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1720:). Therefore, it generally means that photodegradation transforms recalcitrant into labile DOC molecules that can be rapidly used by prokaryotes for biomass production and respiration. However, it can also increase CDOM through the transformation of compounds such as triglycerides, into more complex aromatic compounds, which are less degradable by microbes. Moreover, UV radiation can produce e.g., reactive oxygen species, which are harmful to microbes. The impact of photochemical processes on the DOC pool depends also on the chemical composition, with some studies suggesting that recently produced autochthonous DOC becomes less bioavailable while allochthonous DOC becomes more bioavailable to prokaryotes after sunlight exposure, albeit others have found the contrary. Photochemical reactions are particularly important in coastal waters which receive high loads of terrestrial derived CDOM, with an estimated ~20–30% of terrestrial DOC being rapidly photodegraded and consumed. Global estimates also suggests that in marine systems photodegradation of DOC produces ~180 Tg C yr of inorganic carbon, with an additional 100 Tg C yr of DOC made more available to microbial degradation. Another attempt at global ocean estimates also suggest that photodegradation (210 Tg C yr) is approximately the same as the annual global input of riverine DOC (250 Tg C yr;), while others suggest that direct photodegradation exceeds the riverine DOC inputs.
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refractory DOC (RDOC) that persists in the ocean for millennia. The ocean is a patchy environment that harbors a great diversity of microbes and physicochemical processes with the potential to remove refractory DOC when these molecules encounter environmental conditions and microbes that can degrade them. Physical mixing transports refractory DOC throughout the ocean realm and thereby increases the likelihood of its removal. Deep ocean waters can be entrained into hydrothermal circulation and associated DOC can be removed by thermal degradation. Sinking particles from the upper ocean release labile DOC (LDOC) that triggers hot spots of microbial activity and primes the removal of refractory molecules. Mixing of subsurface waters into sunlit waters exposes refractory DOC to warmer temperatures and photochemical processes that can mineralize and transform refractory molecules into simple compounds (e.g., pyruvate, formaldehyde) for rapid microbial utilization. Thus, it appears the lifetime of refractory molecules in the ocean is regulated by the rate of global overturning circulation (GOC). This relationship indicates a slowing of GOC could lead to an increase in the reservoir size of refractory DOC, assuming a constant production rate of refractory DOC (inset panel).
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compounds are highly photosensitive, whereas proteins, carbohydrates, and their monomers are readily taken up by bacteria. Microbes and other consumers are selective in the type of DOM they utilize and typically prefer certain organic compounds over others. Consequently, DOM becomes less reactive as it is continually reworked. Said another way, the DOM pool becomes less labile and more refractory with degradation. As it is reworked, organic compounds are continually being added to the bulk DOM pool by physical mixing, exchange with particles, and/or production of organic molecules by the consumer community. As such, the compositional changes that occur during degradation are more complex than the simple removal of more labile components and resultant accumulation of remaining, less labile compounds.
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1547:) are highly productive and extend over large areas in coastal waters but their production of DOC has not received much attention. Macrophytes release DOC during growth with a conservative estimate (excluding release from decaying tissues) suggesting that macroalgae release between 1-39% of their gross primary production, while seagrasses release less than 5% as DOC of their gross primary production. The released DOC has been shown to be rich in carbohydrates, with rates depending on temperature and light availability. Globally the macrophyte communities have been suggested to produce ~160 Tg C yr of DOC, which is approximately half the annual global river DOC input (250 Tg C yr).
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1692:(CDOM) absorbs light in the blue and UV-light range and therefore influences plankton productivity both negatively by absorbing light, that otherwise would be available for photosynthesis, and positively by protecting plankton organisms from harmful UV-light. However, as the impact of UV damage and ability to repair is extremely variable, there is no consensus on how UV-light changes might impact overall plankton communities. The CDOM absorption of light initiates a complex range of photochemical processes, which can impact nutrient, trace metal and DOC chemical composition, and promote DOC degradation.
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concentrations indicated by dark blue fields) is present during overturning of the water column. precursor for deep and intermediate water mass formation. DOC is also exported with subduction in the gyres. In regions where DOCenriched subtropical water is prevented by polar frontal systems from serving as a precursor for overturning circulation (such as at the sites of
Antarctic Bottom Water formation in the Southern Ocean) DOC export is a weak component of the biological pump. Waters south of the Antarctic Polar Front lack significant exportable DOC (depicted by light blue field) during winter.
1583:. The DOC concentrations in sediments are often an order of magnitude higher than in the overlying water column. This concentration difference results in a continued diffusive flux and suggests that sediments are a major DOC source releasing 350 Tg C yr, which is comparable to the input of DOC from rivers. This estimate is based on calculated diffusive fluxes and does not include resuspension events which also releases DOC and therefore the estimate could be conservative. Also, some studies have shown that geothermal systems and petroleum seepage contribute with pre-aged DOC to the deep
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temperature, sun-light exposure, biological production of recalcitrant compounds, and the effect of priming or dilution of individual molecules. For example, lignin can be degraded in aerobic soils but is relatively recalcitrant in anoxic marine sediments. This example shows bioavailability varies as a function of the ecosystem's properties. Accordingly, even normally ancient and recalcitrant compounds, such as petroleum, carboxyl-rich alicyclic molecules, can be degraded in the appropriate environmental setting.
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3,000 meters, highest concentrations are in the North
Atlantic Deep Water where dissolved organic carbon from the high concentration surface ocean is removed to depth. While in the northern Indian Ocean high DOC is observed due to high fresh water flux and sediments. Since the time scales of horizontal motion along the ocean bottom are in the thousands of years, the refractory dissolved organic carbon is slowly consumed on its way from the North Atlantic and reaches a minimum in the North Pacific.
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photochemical degradation (yellow arrow), or particle exchange (green arrow). Labile components are removed down the water column and DOC becomes diluted by processes, such as particle exchange (brown arrow), sediment dissolution (gray arrow), and microbial reworking (white arrow), which continue to alter, add, and/or remove molecules from the bulk DOC pool. Thus, the apparent recalcitrance of DOC in the ocean’s interior is an emergent property that is largely controlled by environmental context.
810:. In some organisms (stages) that do not feed in the traditional sense, dissolved matter may be the only external food source. Moreover, DOC is an indicator of organic loadings in streams, as well as supporting terrestrial processing (e.g., within soil, forests, and wetlands) of organic matter. Dissolved organic carbon has a high proportion of biodegradable dissolved organic carbon (BDOC) in first order streams compared to higher order streams. In the absence of extensive
1680:, but it also stimulates the bacterial degradation of the flocculated DOC. The impacts of flocculation on the removal of DOC from coastal waters are highly variable with some studies suggesting it can remove up to 30% of the DOC pool, while others find much lower values (3–6%;). Such differences could be explained by seasonal and system differences in the DOC chemical composition, pH, metallic cation concentration, microbial reactivity, and ionic strength.
51:
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between 1,000 and 4,000 years in surface waters, and between 3,000 and 6,000 years in the deep ocean, indicating that it persists through several deep ocean mixing cycles between 300 and 1,400 years each. Behind these average radiocarbon ages, a large spectrum of ages is hidden. Follett et al. showed DOC comprises a fraction of modern radiocarbon age, as well as DOC reaching radiocarbon ages of up to 12,000 years.
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1278:(R), and exchanged with the atmosphere. Organic carbon is produced by organisms and is released during and after their life; e.g., in rivers, 1–20% of the total amount of DOC is produced by macrophytes. Carbon can enter the system from the catchment and is transported to the oceans by rivers and streams. There is also exchange with carbon in the sediments, e.g., burial of organic carbon, which is important for
1427:). Prokaryotes are also the main decomposers of DOC, although for some of the most recalcitrant forms of DOC very slow abiotic degradation in hydrothermal systems or possibly sorption to sinking particles may be the main removal mechanism. Mechanistic knowledge about DOC-microbe-interactions is crucial to understand the cycling and distribution of this active carbon reservoir.
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resistant to degradation and can persist in the ocean for millennia. In the coastal ocean, organic matter from terrestrial plant litter or soils appears to be more refractory and thus often behaves conservatively. In addition, refractory DOC is produced in the ocean by the bacterial transformation of labile DOC, which reshapes its composition.
1112:. Soil DOM can be derived from different sources (inputs), such as atmospheric carbon dissolved in rainfall, litter and crop residues, manure, root exudates, and decomposition of soil organic matter (SOM). In the soil, DOM availability depends on its interactions with mineral components (e.g., clays, Fe and Al oxides) modulated by
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alternative or additional explanation is given by the "dilution hypothesis", that all compounds are labile, but exist in concentrations individually too low to sustain microbial populations but collectively form a large pool. The dilution hypothesis has found support in recent experimental and theoretical studies.
1476:). These compounds are widely distributed in the ocean, suggesting that bacterial DOC production could be important in marine systems. Viruses are the most abundant life forms in the oceans infecting all life forms including algae, bacteria and zooplankton. After infection, the virus either enters a dormant (
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vegetation and soils, coastal fringe ecosystems) and may have been produced recently or thousands of years ago. Moreover, even organic compounds deriving from the same source and of the same age may have been subjected to different processing histories prior to accumulating within the same pool of DOM.
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Dissolved organic matter recalcitrance (i.e., its overall reactivity toward degradation and/or utilization) is therefore an emergent property. The perception of DOM recalcitrance changes during organic matter degradation and in conjunction with any other process that removes or adds organic compounds
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account for an unknown part of the freshwater DOC flux to the oceans. The DOC in groundwater is a mixture of terrestrial, infiltrated marine, and in situ microbially produced material. This flux of DOC to coastal waters could be important, as concentrations in groundwater are generally higher than in
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In panel (A) oceanic DOC stocks are shown in black circles with red font and units are Pg-C. DOC fluxes are shown in black and white font and units are either Tg-C yr or Pg-C yr. Letters in arrows and associated flux values correspond to descriptions displayed in (B), which lists sources and sinks of
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release commonly accounting between 5 and 30% of their total primary production, although this varies from species to species. Nonetheless, this release of extracellular DOC is enhanced under high light and low nutrient levels, and thus should increase relatively from eutrophic to oligotrophic areas,
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Jiao, Nianzhi; Herndl, Gerhard J.; Hansell, Dennis A.; Benner, Ronald; Kattner, Gerhard; Wilhelm, Steven W.; Kirchman, David L.; Weinbauer, Markus G.; Luo, Tingwei; Chen, Feng; Azam, Farooq (2010). "Microbial production of recalcitrant dissolved organic matter: long-term carbon storage in the global
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is a closely related term often used interchangeably with DOC. While DOC refers specifically to the mass of carbon in the dissolved organic material, DOM refers to the total mass of the dissolved organic matter. So DOM also includes the mass of other elements present in the organic material, such as
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More precise measurement techniques developed in the late 1990s have allowed for a good understanding of how dissolved organic carbon is distributed in marine environments both vertically and across the surface. It is now understood that dissolved organic carbon in the ocean spans a range from very
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Regions of significant net DOC production (broad arrows) include coastal and equatorial upwelling regions that support much of the global new production. DOC is transported into and around the subtropical gyres with the wind-driven surface circulation. Export takes place if exportable DOC (elevated
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Interior ocean DOM is a highly modified fraction that remains after years of exposure to sunlight, utilization by heterotrophs, flocculation and coagulation, and interaction with particles. Many of these processes within the DOM pool are compound- or class-specific. For example, condensed aromatic
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Dissolved organic matter is a heterogeneous pool of thousands, likely millions, of organic compounds. These compounds differ not only in composition and concentration (from pM to μM), but also originate from various organisms (phytoplankton, zooplankton, and bacteria) and environments (terrestrial
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Benner, R., and
Ziegler, S. (1999). "Do photochemical transformations of dissolved organic matter produce biorefractory as well as bioreactive substrates?" in Proceedings of the 8th International Symposium on Microbial Ecology, eds C. R. Bell, M. Brylinsky, and P. Johnson-Green (Port Aransas, TX:
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In addition to vertical distributions, horizontal distributions have been modeled and sampled as well. In the surface ocean at a depth of 30 meters, the higher dissolved organic carbon concentrations are found in the South
Pacific Gyre, the South Atlantic Gyre, and the Indian Ocean. At a depth of
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DOC is conceptually divided into labile DOC, which is rapidly taken up by heterotrophic microbes, and the recalcitrant DOC reservoir, which has accumulated in the ocean (following a definition by
Hansell). As a consequence of its recalcitrance, the accumulated DOC reaches average radiocarbon ages
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Filtered (0.2 μm) coastal marine waters collected at various locations around the United
Kingdom. The differences in colour is due to the range of soil-derived carbon input to the coastal water, with dark brown (left) indicating a high soil-derived carbon contribution and near-clear water (right)
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The surprising resistance of high concentrations of DOC to microbial degradation has been addressed by several hypotheses. The prevalent notion is that the recalcitrant fraction of DOC has certain chemical properties, which prevent decomposition by microbes ("intrinsic stability hypothesis"). An
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of DOC has been found at high-temperature hydrothermal ridge-flanks, where outflow DOC concentrations are lower than in the inflow. While the global impact of these processes has not been investigated, current data suggest it is a minor DOC sink. Abiotic DOC flocculation is often observed during
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The dots represent DOC molecules and arrows represent physicochemical and biological processes that impact DOC concentration and molecular composition. In the surface ocean, DOC derived from primary production is rapidly remineralized or transformed through microbial degradation (black arrow),
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Phytoplankton production and food web dynamics in surface waters release a diverse mixture of dissolved molecules with varying reactivities. Bacteria and archaea utilize labile and semi-labile forms of DOC in surface and mesopelagic waters of the upper ocean, leaving behind a vast reservoir of
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sources. Autochthonous DOC is produced within the system, primarily by plankton organisms and in coastal waters additionally by benthic microalgae, benthic fluxes, and macrophytes, whereas allochthonous DOC is mainly of terrestrial origin supplemented by groundwater and atmospheric inputs. In
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DOC, and these terms seem to be used interchangeably in the context of DOC. Depending on the origin and composition of DOC, its behavior and cycling are different; the labile fraction of DOC decomposes rapidly through microbially or photochemically mediated processes, whereas refractory DOC is
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Sparling, G.; Chibnall, E.; Pronger, J.; Rutledge, S.; Wall, A.; Campbell, D.; Schipper, L. 2016. Estimates of annual leaching losses of dissolved organic carbon from pastures on
Allophanic soils grazed by dairy cattle, Waikato, New Zealand. New Zealand Journal of Agricultural Research 59:
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This wide range in turnover or degradation times has been linked with the chemical composition, structure and molecular size, but degradation also depends on the environmental conditions (e.g., nutrients), prokaryote diversity, redox state, iron availability, mineral-particle associations,
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Due to the continuous production and degradation in natural systems, the DOC pool contains a spectrum of reactive compounds each with their own reactivity, that have been divided into fractions from labile to recalcitrant, depending on the turnover times, as shown in the following table...
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Del-Giorgio, P., and Davies, J. (2003). "Patterns of dissolved organic matter lability and consumption across aquatic ecosystems", in
Aquatic Ecosystems: Interactivity of Dissolved Organic Matter, eds S. E. G. Findlay and R. L. Sinsabaugh (San Diego, CA: Academic Press), 399–424. doi:
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Webb, J. R., Santos, I. R., Maher, D. T., Tait, D. R., Cyronak, T., Sadat-Noori, M., et al. (2019). Groundwater as a source of dissolved organic matter to coastal waters: insights from radon and CDOM observations in 12 shallow coastal systems. Limnol. Oceanogr. 64, 182–196. doi:
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Thingstad, T. F., Havskum, H., Kaas, H., Nielsen, T. G., Riemann, B., Lefevre, D., et al. (1999). Bacteria-protist interactions and organic matter degradation under P-limited conditions: analysis of an enclosure experiment using a simple model. Limnol. Oceanogr. 44, 62–79. doi:
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processes. It also depends on SOM fractions (e.g., stabilized organic molecules and microbial biomass) by mineralization and immobilization processes. In addition, the intensity of these interactions changes according to soil inherent properties, land use, and crop management.
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Wada, S., Aoki, M. N., Tsuchiya, Y., Sato, T., Shinagawa, H., and Hama, T. (2007). Quantitative and qualitative analyses of dissolved organic matter released from
Ecklonia cava Kjellman, in Oura Bay, Shimoda, Izu Peninsula, Japan. J. Exp. Mar. Biol. Ecol. 349, 344–358. doi:
1075:. This carbon (1.9 Pg C y) is transported to the oceans (0.9 Pg C y), buried in the sediments (0.2 Pg C y) or emitted as CO (0.8 Pg C y). More recent estimations are different: In 2013, Raymond et al. claimed CO emission from inland waters can be as high as 2.1 Pg C y.
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Myers-Pigg, A. N., Louchouarn, P., Amon, R. M. W., Prokushkin, A., Pierce, K., and
Rubtsov, A. (2015). Labile pyrogenic dissolved organic carbon in major Siberian Arctic rivers: implications for wildfire-stream metabolic linkages. Geophys. Res. Lett. 42, 377–385. doi:
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Hudson, J. J., Dillon, P. J., and Somers, K. M. (2003). Long-term patterns in dissolved organic carbon in boreal lakes: the role of incident radiation, precipitation, air temperature, southern oscillation and acid deposition. Hydrol. Earth Syst. Sci. 7, 390–398. doi:
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Williamson, C. E., Stemberger, R. S., Morris, D. P., Frost, T. A., and Paulsen, S. G. (1996). Ultraviolet radiation in North American lakes: attenuation estimates from DOC measurements and implications for plankton communities. Limnol. Oceanogr. 41, 1024–1034. doi:
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Hewson, I., O'neil, J. M., Fuhrman, J. A., and Dennison, W. C. (2001). Virus-like particle distribution and abundance in sediments and overlying waters along eutrophication gradients in two subtropical estuaries. Limnol. Oceanogr. 46, 1734–1746. doi:
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Wagner, S., Schubotz, F., Kaiser, K., Hallmann, C., Waska, H., Rossel, P.E., Hansman, R., Elvert, M., Middelburg, J.J., Engel, A. and Blattmann, T.M. (2020) "Soothsaying DOM: A current perspective on the future of oceanic dissolved organic carbon".
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Aquatic systems are very important in global carbon sequestration; e.g., when different European ecosystems are compared, inland aquatic systems form the second largest carbon sink (19–41 Tg C y); only forests take up more carbon (125–223 Tg C y).
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Jumars, P. A., Penry, D. L., Baross, J. A., and Perry, M. J. (1989). Closing the microbial loop: dissolved carbon pathway to heterotrophic bacteria from incomplete ingestion, digestion and absorption in animals. Deep Sea Res. 36, 483–495. doi:
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Kattner, G., Simon, M., and Koch, B. P. (2011). "Molecular characterization of dissolved organic matter and constraints for prokaryotic utilization", in Microbial Carbon Pump in the Ocean, eds N. Jiao, F. Azam, and S. Sansers (Washington, DC:
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Wang, X.-C., Chen, R. F., and Gardner, G. B. (2004). Sources and transport of dissolved and particulate organic carbon in the Mississippi River estuary and adjacent coastal waters of the northern Gulf of Mexico. Mar. Chem. 89, 241–256. doi:
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Sulzberger, B., and Durisch-Kaiser, E. (2009). Chemical characterization of dissolved organic matter (DOM): a prerequisite for understanding UV-induced changes of DOM absorption properties and bioavailability. Aquat. Sci. 71, 104–126. doi:
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Lønborg, C., Álvarez-Salgado, X. A., Davidson, K., and Miller, A. E. J. (2009). Production of bioavailable and refractory dissolved organic matter by coastal heterotrophic microbial populations. Estuar. Coast. Shelf Sci. 82, 682–688. doi:
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Volk, C., Bell, K., Ibrahim, E., Verges, D., Amy, G., and Lechevallier, M. (2000). Impact of enhanced and optimized coagulation on removal of organic matter and its biodegradable fraction in drinking water. Water Res. 34, 3247–3257. doi:
1830:. Moreover, DOM samples often contain high concentrations of inorganic salts that are incompatible with such techniques. Therefore, it is necessary a concentration and isolation step of the sample. The most used isolation techniques are
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Burdige, D. J., and Komada, T. (2014). "Sediment pore waters", in Biogeochemistry of Marine Dissolved Organic Matter, eds D. A. Hansen and C. A. Carlson (Cambridge, MA: Academic Press), 535–577. doi: 10.1016/B978-0-12-405940-5.00012-1
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Burnett, W. C., Aggarwal, P. K., Aureli, A., Bokuniewicz, H., Cable, J. E., Charette, M. A., et al. (2006). Quantifying submarine groundwater discharge in the coastal zone via multiple methods. Sci. Total Environ. 367, 498–543. doi:
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Cole, J. J., Prairie, Y. T., Caraco, N. F., McDowell, W. H., Tranvik, L. J., Striegl, R. G., et al. (2007). Plumbing the global carbon cycle: integrating inland waters into the terrestrial carbon budget. Ecosystems 10, 172–185. doi:
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processes from dead organic matter including plants and animals. DOC can originate from within or outside any given body of water. DOC originating from within the body of water is known as autochthonous DOC and typically comes from
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Moran, M. A., Sheldon, W. M., and Zepp, R. G. (2000). Carbon loss and optical property changes during long-term photochemical and biological degradation of estuarine dissolved organic matter. Limnol. Oceanogr. 45, 1254–1264. doi:
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Zigah, Prosper K.; McNichol, Ann P.; Xu, Li; Johnson, Carl; Santinelli, Chiara; Karl, David M.; Repeta, Daniel J. (2017). "Allochthonous sources and dynamic cycling of ocean dissolved organic carbon revealed by carbon isotopes".
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Berto, S., Laurentiis, E. D., Tota, T., Chiavazza, E., Daniele, P. G., Minella, M., et al. (2016). Properties of the humic-like material arising from the phototransformation of L-tyrosine. Sci. Total Environ. 546, 434–444. doi:
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Saidy, A.R.; Smernik, R.J.; Baldock, J.A.; Kaiser, K.; Sanderman, J. 2015. Microbial degradation of organic carbon sorbed to phyllosilicate clays with and without hydrous iron oxide coating. European Journal of Soil Science 66:
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Carlson, C. A., and Hansell, D. A. (2015). "DOM sources, sinks, reactivity, and budgets", in Biogeochemistry of Marine Dissolved Organic Matter, eds C. A. Carlson and D. A. Hansell (San Diego, CA: Academic Press), 65–126. doi:
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to very recalcitrant (refractory). The labile dissolved organic carbon is mainly produced by marine organisms and is consumed in the surface ocean, and consists of sugars, proteins, and other compounds that are easily used by
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Stubbins, A., Uher, G., Law, C. S., Mopper, K., Robinson, C., and Upstill-Goddard, R. C. (2006). Open-ocean carbon monoxide photoproduction. Deep Sea Res. II Top. Stud. Oceanogr. 53, 1695–1705. doi: 10.1016/j.dsr2.2006.05.011
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can use as a source of energy and carbon. Some subset of DOC constitutes the precursors of disinfection byproducts for drinking water. BDOC can contribute to undesirable biological regrowth within water distribution systems.
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Miller, W. L., and Moran, M. A. (1997). Interaction of photochemical and microbial processes in the degradation of refractory dissolved organic matter from a coastal marine environment. Limnol. Oceanogr. 42, 1317–1324. doi:
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Raymond, P. A., and Spencer, R. G. M. (2015). "Riverine DOM", in Biogeochemistry of Marine Dissolved Organic Matter, eds D. A. Hansell and C. A. Carlson (Amsterdam: Elsevier), 509–533. doi: 10.1016/B978-0-12-405940-5.00011-X
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Veum, K.S.; Goyne, K.W.; Motavalli, P.P.; Udawatta, R.P. 2009. Runoff and dissolved organic carbon loss from a paired-watershed study of three adjacent agricultural Watersheds. Agriculture, Ecosystems & Environment 130:
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Mopper, K., Kieber, D. J., and Stubbins, A. (2015). "Marine photochemistry of organic matter", in Biogeochemistry of Marine Dissolved Organic Matter, eds C. A. Carlson and D. A. Hansell (Amsterdam: Elsevier), 389–450. doi:
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Sobek, S., Tranvik, L. J., Prairie, Y. T., Kortelainen, P., and Cole, J. J. (2007). Patterns and regulation of dissolved organic carbon: an analysis of 7,500 widely distributed lakes. Limnol. Oceanogr. 52, 1208–1219. doi:
1255:). The inorganic carbon compounds exist in equilibrium that depends on the pH of the water. DIC concentrations in freshwater range from about zero in acidic waters to 60 mg C L in areas with carbonate-rich sediments.
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Dissolved organic matter (DOM) is one of the most active and mobile carbon pools and has an important role in global carbon cycling. In addition, dissolved organic carbon (DOC) affects the soil negative electrical charges
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Miller, W. L., Moran, M. A., Sheldon, W. M., Zepp, R. G., and Opsahl, S. (2002). Determination of apparent quantum yield spectra for the formation of biologically labile photoproducts. Limnol. Oceanogr. 47, 343–352. doi:
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Lønborg, C., and Álvarez-Salgado, X. A. (2012). Recycling versus export of bioavailable dissolved organic matter in the coastal ocean and efficiency of the continental shelf pump. Glob. Biogeochem. Cycles 26:GB3018. doi:
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Ferguson, R. L., and Sunda, W. G. (1984). Utilization of amino acids by planktonic marine bacteria: importance of clean technique and low substrate additions. Limnol. Oceanogr. 29, 258–274. doi: 10.4319/lo.1984.29.2.0258
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Martin, P., Cherukuru, N., Tan, A.S., Sanwlani, N., Mujahid, A. and Müller, M.(2018) "Distribution and cycling of terrigenous dissolved organic carbon in peatland-draining rivers and coastal waters of Sarawak, Borneo",
1757:. Recalcitrant dissolved organic carbon is evenly spread throughout the water column and consists of high molecular weight and structurally complex compounds that are difficult for marine organisms to use such as the
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Kieber, R. J., Hydro, L. H., and Seaton, P. J. (1997). Photooxidation of triglycerides and fatty acids in seawater: implication toward the formation of marine humic substances. Limnol. Oceanogr. 42, 1454–1462. doi:
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Miller, W. L., and Zepp, R. G. (1995). Photochemical production of dissolved inorganic carbon from terrestrial organic matter: significance of the oceanic organic carbon cycle. Geophys. Res. Lett. 22, 417–420. doi:
853:(TOC) is an operational classification. Many researchers use the term "dissolved" for compounds that pass through a 0.45 μm filter, but 0.22 μm filters have also been used to remove higher colloidal concentrations.
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Lang, S. Q., Butterfield, D. A., Lilley, M. D., Paul Johnson, H., and Hedges, J. I. (2006). Dissolved organic carbon in ridge-axis and ridge-flank hydrothermal systems. Geochim. Cosmochim. Acta 70, 3830–3842. doi:
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Komada, T., and Reimers, C. E. (2001). Resuspension-induced partitioning of organic carbon between solid and solution phases from a river–ocean transition. Mar. Chem. 76, 155–174. doi: 10.1016/S0304-4203(01)00055-X
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Keil, R. G., and Mayer, L. M. (2014). "Mineral matrices and organic matter", in Treatise on Geochemistry, 2nd Edn, eds H. Holland and K. Turekian (Oxford: Elsevier), 337–359. doi: 10.1016/B978-0-08-095975-7.01024-X
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Bianchi, T. S. (2011). The role of terrestrially derived organic carbon in the coastal ocean: a changing paradigm and the priming effect. Proc. Natl. Acad. Sci. U.S.A. 108, 19473–19481. doi: 10.1073/pnas.1017982108
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1216:; particles > 0.45 μm) and DOC (dissolved organic carbon; particles < 0.45 μm). DOC usually makes up 90% of the total amount of aquatic organic carbon. Its concentration ranges from 0.1 to >300 mg L.
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Benner, R., Benitez-Nelson, B., Kaiser, K., and Amon, R. M. W. (2004). Export of young terrigenous dissolved organic carbon from rivers to the Arctic Ocean. Geophys. Res. Lett. 31:L05305. doi: 10.1029/2003GL019251
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Kerner, M., Hohenberg, H., Ertl, S., Reckermann, M., and Spitzy, A. (2003). Self-organization of dissolved organic matter tomicelle-like microparticles in river water. Nature 422, 150–154. doi: 10.1038/nature01469
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Karl, D. M., Hebel, D. V., Bjorkman, K., and Letelier, R. M. (1998). The role of dissolved organic matter release in the productivity of the oligotrophic north Pacific Ocean. Limnol. Oceanogr. 43, 1270–1286. doi:
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Dachs, J., and Méjanelle, L. (2010). Organic pollutants in coastal waters, sediments, and biota: a relevant driver for ecosystems during the anthropocene? Estuarines Coasts 33, 1–14. doi: 10.1007/s12237-009-9255-8
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Zech, W.; Senesi, N.; Guggenberger, G.; Kaiser, K.; Lehmann, J.; Miano, T.M.; Miltner, A.; Schroth, G. 1997. Factors controlling humification and mineralization of soil organic matter in the tropics. Geoderma 79:
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Kawasaki, N., and Benner, R. (2006). Bacterial release of dissolved organic matter during cell growth and decline: molecular origin and composition. Limnol. Oceanogr. 51, 2170–2180. doi: 10.4319/lo.2006.51.5.2170
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Andrews, S. S., and Zafiriou, O. C. (2000). Photochemical oxygen consumption in marine waters: a Major soink for colored dissolved organic matter? Limnol. Oceanogr. 45, 267–277. doi: 10.4319/lo.2000.45.2.0267
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Willey, J. D., Kieber, R. J., Eyman, M. S. Jr., and Brooks Avery, G. (2000). Rainwater dissolved organic carbon concentrations and global flux. Glob. Biogeochem. Cycles 14, 139–148. doi: 10.1029/1999GB900036
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Moran, M. A., and Zepp, R. G. (1997). Role of photoreactions in the formation of biologically labile compounds from dissolved organic matter. Limnol. Oceanogr. 42, 1307–1316. doi: 10.4319/lo.1997.42.6.1307
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860:
is all substances that pass through a GF/F filter, which has a nominal pore size of approximately 0.7 μm (Whatman glass microfiber filter, 0.6–0.8 μm particle retention). The recommended procedure is the
826:
may be near the top of the range and the middle of oceans may be near the bottom. Occasionally, high concentrations of organic carbon indicate anthropogenic influences, but most DOC originates naturally.
2732:
Ward, N. D., Keil, R. G., Medeiros, P. M., Brito, D. C., Cunha, A. C., Dittmar, T., et al. (2013). Degradation of terrestrially derived macromolecules in the Amazon River. Nat. Geosci. 6, 530–533. doi:
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Obernosterer, I., and Herndl, G. J. (1995). Phytoplankton extracellular release and bacterial growth: dependence on the inorganic N:P ratio. Mar. Ecol. Prog. Ser. 116, 247–257. doi: 10.3354/meps116247
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1444:
during physiological stress situations e.g., nutrient limitation. Other studies have demonstrated DOC production in association with meso- and macro-zooplankton feeding on phytoplankton and bacteria.
3968:
Sholkovitz, E. R. (1976). Flocculation of dissolved organic and inorganic matter during the mixing of river water and seawater. Geochim. Cosmochim. Acta 40, 831–845. doi: 10.1016/0016-7037(76)90035-1
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Thomas, J. D. (1997). The role of dissolved organic matter, particularly free amino acids and humic substances, in freshwater ecosystems. Freshw. Biol. 38, 1–36. doi: 10.1046/j.1365-2427.1997.00206.x
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Powell, R. T., Landing, W. M., and Bauer, J. E. (1996). Colloidal trace metals, organic carbon and nitrogen in a southeastern U.S. estuary. Mar. Chem. 55, 165–176. doi: 10.1016/S0304-4203(96)00054-0
1456:, excretion and defecation which can be important energy sources for microbes. Such DOC production is largest during periods with high food concentration and dominance of large zooplankton species.
2833:
Reitsema, R.E., Meire, P. and Schoelynck, J. (2018) "The future of freshwater macrophytes in a changing world: dissolved organic carbon quantity and quality and its interactions with macrophytes".
822:, baseflow concentrations of DOC in undisturbed watersheds generally range from approximately 1 to 20 mg/L carbon. Carbon concentrations considerably vary across ecosystems. For example, the
4529:
Hodson, R. E., Maccubbin, A. E., and Pomeroy, L. R. (1981). Dissolved adenosine triphosphate utilization by free-living and attached bacterioplankton. Mar. Biol. 64, 43–51. doi: 10.1007/bf00394079
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Rhode, S. C., Pawlowski, M., and Tollrian, R. (2001). The impact of ultraviolet radiation on the vertical distribution of zooplankton of the genus Daphnia. Nature 412, 69–72. doi: 10.1038/35083567
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Kaiser, K.; Guggenberger, G. 2007. Sorptive stabilization of organic matter by microporous goethite: sorption into small pores vs. surface complexation. European Journal of Soil Science 58: 45–59.
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Raymond, P. A., Hartmann, J., Lauerwald, R., Sobek, S., McDonald, C., Hoover, M., et al. (2013). Global carbon dioxide emissions from inland waters. Nature 503, 355–359. doi: 10.1038/nature12760
30:
Net DOC production (NDP) in the upper 74 metres (a) and net DOC export (NDX) below 74 metres (b). At steady state, the global summation of NDX is equal to that of NDP, and is 2.31 ± 0.60 PgC yr.
3739:
Burdige, D. J., and Gardner, K. G. (1998). Molecular weight distribution of dissolved organic carbon in marine sediment pore waters. Mar. Chem. 62, 45–64. doi: 10.1016/S0304-4203(98)00035-8
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Kaiser, K., and Benner, R. (2008). Major bacterial contribution to the ocean reservoir of detrital organic carbon and nitrogen. Limnol. Oceanogr. 53, 99–112. doi: 10.4319/lo.2008.53.1.0099
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Penhale, P. A., and Smith, W. O. (1977). Excretion of dissolved organic carbon by eelgrass (Zostera marina) and its epiphytes. Limnol. Oceanogr. 22, 400–407. doi: 10.4319/lo.1977.22.3.0400
1472:. The biochemical components of bacteria are largely the same as other organisms, but some compounds from the cell wall are unique and are used to trace bacterial derived DOC (e.g.,
3314:
Thornton, D. C. O. (2014). Dissolved organic matter (DOM) release by phytoplankton in the contemporary and future ocean. Eur. J. Phycol. 49, 20–46. doi: 10.1080/09670262.2013.875596
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Kirchman, David L.; Suzuki, Yoshimi; Garside, Christopher; Ducklow, Hugh W. (15 August 1991). "High turnover rates of dissolved organic carbon during a spring phytoplankton bloom".
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nitrogen, oxygen and hydrogen. DOC is a component of DOM and there is typically about twice as much DOM as DOC. Many statements that can be made about DOC apply equally to DOM, and
2973:
Stumm, W., and Morgan, J. J. (1996). Aquatic Chemistry: Chemical Equilibria and Rates in Natural Waters. Environmental Science and Technology. New York: John Wiley & Sons, Inc.
1387:
Dissolved organic carbon (DOC) represents one of the Earth's major carbon pools. It contains a similar amount of carbon as the atmosphere and exceeds the amount of carbon bound in
1168:. The concentration, composition, and bioavailability of DOC are altered during transport through the soil column by various physicochemical and biological processes, including
3368:
Iturriaga, R., and Zsolnay, A. (1981). Transformation of some dissolved organic compounds by a natural heterotrophic population. Mar. Biol. 62, 125–129. doi: 10.1007/BF00388174
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Amon, R. M. W., and Benner, R. (1996). Bacterial utilization of different size classes of dissolved organic matter. Limnol. Oceanogr. 41, 41–51. doi: 10.4319/lo.1996.41.1.0041
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Benner, R., and Amon, R. M. (2015). The size-reactivity continuum of major bioelements in the ocean. Ann. Rev. Mar. Sci. 7, 185–205. doi: 10.1146/annurev-marine-010213-135126
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Kalbitz, K.; Solinger, S.; Park, J.H.; Michalzik, B.; Matzner, E. 2000. Controls on the dynamics of dissolved organic matter in soils: a review. Soil Science 165: 277–304.
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Mulholland, P. J. (1981). Formation of Particulate Organic Carbon in Water from a Southeastern Swamp-Stream. Limnol. Oceanogr. 26, 790–795. doi: 10.4319/lo.1981.26.4.0790
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Barrón, C., and Duarte, C. M. (2015). Dissolved organic carbon pools and export from the coastal ocean. Glob. Biogeochem. Cycles 29, 1725–1738. doi: 10.1002/2014GB005056
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Pregnall, A. M. (1983). Release of dissolved organic carbon from the estuarine intertidal macroalga Enteromorpha prolifera. Mar. Biol. 73, 37–42. doi: 10.1007/BF00396283
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Chin, W. C., Orellana, M. V., and Verdugo, P. (1998). Spontaneous assembly of marine dissolved organic matter into polymer gels. Nature 391, 568–572. doi: 10.1038/35345
2007:
1310:
Simplified view of the main sources (black text; underlined are the allochthonous sources) and sinks (yellow text) of the oceanic dissolved organic carbon (DOC) pool.
2332:
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The marine DOC pool is important for the functioning of marine ecosystems because they are at the interface between the chemical and the biological worlds. DOC fuels
3431:
McCarthy, M., Pratum, T., Hedges, J., and Benner, R. (1997). Chemical composition of dissolved organic nitrogen in the ocean. Nature 390, 150–154. doi: 10.1038/36535
1516:
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Stubbins, A., Niggemann, J., and Dittmar, T. (2012). Photo-lability of deep ocean dissolved black carbon. Biogeosciences 9, 1661–1670. doi: 10.5194/bg-9-1661-2012
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Hollibaugh, J. T., and Azam, F. (1983). Microbial degradation of dissolved proteins in seawater. Limnol. Oceanogr. 28, 1104–1116. doi: 10.4319/lo.1983.28.6.1104
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Lee, S.A., Kim, T.H. and Kim, G. (2020) "Tracing terrestrial versus marine sources of dissolved organic carbon in a coastal bay using stable carbon isotopes".
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Jaeckle, W.B.; Manahan, D.T. (1989). "Feeding by a "nonfeeding" larva: uptake of dissolved amino acids from seawater by lecithotrophic larvae of the gastropod
4854:
Green, Nelson W.; Perdue, E. Michael; Aiken, George R.; Butler, Kenna D.; Chen, Hongmei; Dittmar, Thorsten; Niggemann, Jutta; Stubbins, Aron (20 April 2014).
1347:– though sometimes photodegradation "transforms" DOC rather than removing it, ending up with higher molecular weight complex molecules), microbial (mainly by
3305:
Wetz, M. S., and Wheeler, P. A. (2007). Release of dissolved organic matter by coastal diatoms. Limnol. Oceanogr. 52, 798–807. doi: 10.4319/lo.2007.52.2.0798
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Madsen, T. V., and Sand-Jensen, K. (1991). Photosynthetic carbon assimilation in aquatic macrophytes. Aquat. Bot. 41, 5–40. doi: 10.1016/0304-3770(91)90037-6
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Dittmar, T., and Koch, B. P. (2006). Thermogenic organic matter dissolved in the abyssal ocean. Mar. Chem. 102, 208–217. doi: 10.1016/j.marchem.2006.04.003
3085:
Hansell, Dennis; Carlson, Craig; Repeta, Daniel; Schlitzer, Reiner (2009). "Dissolved Organic Matter in the Ocean: A Controversy Stimulates New Insights".
1769:. As a result, the observed vertical distribution consists of high concentrations of labile DOC in the upper water column and low concentrations at depth.
2352:"Relationship Between Heterotrophic Bacteria and Some Physical and Chemical Parameters in a Northern City's Drinking Water Distribution Networks of China"
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Right side: microbial loop, with bacteria using dissolved organic carbon to gain biomass, which then re-enters the classic carbon flow through protists.
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3775:
Dittmar, T., and Paeng, J. (2009). A heat-induced molecular signature in marine dissolved organic matter. Nat. Geosci. 2, 175–179. doi: 10.1038/ngeo440
3981:(1989). Effects of flocculated humic matter on free and attached pelagic microorganisms. Limnol. Oceanogr. 34, 688–699. doi: 10.4319/lo.1989.34.4.0688
1196:. Bioavailable DOM is subjected to microbial decomposition, resulting in a reduction in size and molecular weight. Novel molecules are synthesized by
423:
96:
2124:
Lønborg, C., Carreira, C., Jickells, T. and Álvarez-Salgado, X.A. (2020) "Impacts of global change on ocean dissolved organic carbon (DOC) cycling".
4420:"Dynamics and Characterization of Refractory Dissolved Organic Matter Produced by a Pure Bacterial Culture in an Experimental Predator-Prey System"
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molecules. The hydrophobicity and retention time of colloids and dissolved molecules in soils are controlled by their size, polarity, charge, and
596:
123:
659:
477:
3349:
Lampert, W. (1978). Release of dissolved organic carbon by grazing zooplankton. Limnol. Oceanogr. 23, 831–834. doi: 10.4319/lo.1978.23.4.0831
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Tremblay, L. and Benner, R. (2006) "Microbial contributions to N-immobilization and organic matter preservation in decaying plant detritus".
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601:
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Gmach, M.R., Cherubin, M.R., Kaiser, K. and Cerri, C.E.P. (2020) "Processes that influence dissolved organic matter in the soil: a review".
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represent the main sites of OM degradation and burial in the ocean, hosting microbes in densities up to 1000 times higher than found in the
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compounds and reducing molecular size, transforming DOC to particulate organic flocs which can sediment and/or be consumed by grazers and
749:. When water originates from land areas with a high proportion of organic soils, these components can drain into rivers and lakes as DOC.
3001:
Luyssaert, S., Abril, G., Andres, R., Bastviken, D., Bellassen, V., Bergamaschi, P., et al. (2012). The European land and inland water CO
2410:
2159:
Monroy, P., Hernández-García, E., Rossi, V. and López, C. (2017) "Modeling the dynamical sinking of biogenic particles in oceanic flow".
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Shen, Y., Chapelle, F.H., Strom, E.W. and Benner, R. (2015) "Origins and bioavailability of dissolved organic matter in groundwater".
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and pollens), and also thousands of synthetic human-made organic chemicals that can be measured in the ocean at trace concentrations.
1380:
from plants exported during rain events, emissions of plant materials to the atmosphere and deposition in aquatic environments (e.g.,
3654:
Brilinsky, M. (1977). Release of dissolved organic matter by some marine macrophytes. Mar. Biol. 39, 213–220. doi: 10.1007/BF00390995
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4915:
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rapid (minutes) shifts in salinity when fresh and marine waters mix. Flocculation changes the DOC chemical composition, by removing
1569:
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1703:
involves the transformation of CDOM into smaller and less colored molecules (e.g., organic acids), or into inorganic carbon (CO, CO
1510:
Left side: classic description of the carbon flow from photosynthetic algae to grazers and higher trophic levels in the food chain.
3381:
Ogawa, H.; Amagai, Y.; Koike, I.; Kaiser, K.; Benner, R. (2001). "Production of refractory dissolved organic matter by bacteria".
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1487:
3449:
Weinbauer, M. A. G. (2004). Ecology of prokaryotic viruses. FEMS Microbiol. Rev. 28, 127–181. doi: 10.1016/j.femsre.2003.08.001
1638:. It has been suggested that the combined effects of photochemical and microbial degradation represent the major sinks of DOC.
3462:: impacts on dissolved organic matter production and composition. Biogeochemistry 116, 231–240. doi: 10.1007/s10533-013-9853-1
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Simon, M., Grossart, H., Schweitzer, B. and Ploug, H. (2002) "Microbial ecology of organic aggregates in aquatic ecosystems".
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Moody, C.S. and Worrall, F. (2017) "Modeling rates of DOC degradation using DOM composition and hydroclimatic variables".
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Roshan, S. and DeVries, T. (2017) "Efficient dissolved organic carbon production and export in the oligotrophic ocean".
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4817:"Structural characterization of dissolved organic matter: a review of current techniques for isolation and analysis"
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Likewise, inorganic carbon also consists of a particulate (PIC) and a dissolved phase (DIC). PIC mainly consists of
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are also important processes associated to DOM losses in the soil. In well-drained soils, leached DOC can reach the
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technique, which calls for filtration through pre-combusted glass fiber filters, typically the GF/F classification.
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and accounts for roughly 10 % of the global land-to-sea dissolved organic carbon (DOC) flux. The rivers carry high
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768:
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3231:"Long-term stability of marine dissolved organic carbon emerges from a neutral network of compounds and microbes"
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1351:), aggregation (primarily when river and seawater mixes) and thermal degradation (in e.g., hydrothermal systems).
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Walker, Brett D.; Beaupré, Steven R.; Guilderson, Thomas P.; McCarthy, Matthew D.; Druffel, Ellen R. M. (2016).
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spring bloom and coupling with the microbial foodweb. Mar. Ecol. Prog. Ser. 81, 269–276. doi: 10.3354/meps081269
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2042:"Autochthonous versus allochthonous carbon sources of bacteria: Results from whole-lake C addition experiments"
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is a mixture of organic compounds originating from detritus or primary producers. It can be divided into POC (
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Stone, Richard (18 June 2010). "Marine Biogeochemistry: The Invisible Hand Behind A Vast Carbon Reservoir".
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Aquatic carbon occurs in different forms. Firstly, a division is made between organic and inorganic carbon.
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molecules are preferentially partitioned onto soil minerals and have a longer retention time in soils than
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Most commonly referred sources of DOC are: atmospheric (e.g., rain and dust), terrestrial (e.g., rivers),
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Kritzberg, Emma S.; Cole, Jonathan J.; Pace, Michael L.; Granéli, Wilhelm; Bade, Darren L. (March 2004).
741:, while DOC originating outside the body of water is known as allochthonous DOC and typically comes from
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4856:"An intercomparison of three methods for the large-scale isolation of oceanic dissolved organic matter"
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Boekell, W. H. M. V., Hansen, F. C., Riegman, R., and Bak, R. P. M. (1992). Lysis-induced decline of a
4343:
Sharp, Jonathan H. (6 August 1996). "Marine dissolved organic carbon: Are the older values correct?".
2333:"Brown Water: The Ecological and Economic Implications of Increased Dissolved Organic Carbon in Lakes"
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Dissolved organic matter can be classified as labile or as recalcitrant, depending on its reactivity.
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The main processes that remove DOC from the ocean water column are: (1) Thermal degradation in e.g.,
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Follett, Christopher L.; Repeta, Daniel J.; Rothman, Daniel H.; Xu, Li; Santinelli, Chiara (2014).
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128:
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Dittmar, Thorsten (2015). "Reasons Behind the Long-Term Stability of Dissolved Organic Matter".
3901:"Mixing it up in the ocean carbon cycle and the removal of refractory dissolved organic carbon"
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probably as a mechanism for dissipating cellular energy. Phytoplankton can also produce DOC by
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Minor, Elizabeth C.; Swenson, Michael M.; Mattson, Bruce M.; Oyler, Alan R. (21 August 2014).
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4204:"Pacific carbon cycling constrained by organic matter size, age and composition relationships"
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Arrieta, J. M.; Mayol, E.; Hansman, R. L.; Herndl, G. J.; Dittmar, T.; Duarte, C. M. (2015).
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Carlson, Craig A.; Hansell, Dennis A. (2015). "DOM Sources, Sinks, Reactivity, and Budgets".
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Bacteria are often viewed as the main consumers of DOC, but they can also produce DOC during
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3628:
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Delong, Edward F.; Karl, David M. (2005). "Genomic perspectives in microbial oceanography".
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1989:
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Precipitation and surface water leaches dissolved organic carbon (DOC) from vegetation and
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O balance between 2001 and 2005. Biogeosciences 9, 3357–3380. doi: 10.5194/bg-9-3357-2012
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by more than two-hundred times. DOC is mainly produced in the near-surface layers during
1328:), and benthic fluxes (exchange of DOC across the sediment-water interface but also from
4937:
4871:
4714:
4657:
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4435:
4390:
4301:
4219:
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3572:
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3184:
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1587:, but consistent global estimates of the overall input are currently lacking. Globally,
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as that which can pass through a filter with a pore size typically between 0.22 and 0.7
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4698:
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Hansell DA and Craig AC (2015) "Marine Dissolved Organic Matter and the Carbon Cycle".
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Suttle, C. A. (2005). Viruses in the sea. Nature 437, 356–361. doi: 10.1038/nature04160
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processes. Other sources of marine DOC are dissolution from particles, terrestrial and
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4601:"Growth of Marine Bacteria at Limiting Concentrations of Organic Carbon in Seawater1"
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Dissolved organic carbon (DOC) fluxes in the surface, mesopelagic, and interior ocean
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4798:
4699:"A Model of Extracellular Enzymes in Free-Living Microbes: Which Strategy Pays Off?"
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4759:"Molecular characterization of dissolved organic matter (DOM): a critical review"
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Traving, Sachia J.; Thygesen, Uffe H.; Riemann, Lasse; Stedmon, Colin A. (2015).
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Hansell, Dennis A.; Craig A. Carlson; Daniel J. Repeta; Reiner Schlitzer (2009).
2304:"Hydraulic Fracturing Operations: Handbook of Environmental Management Practices"
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1588:
1584:
1469:
1424:
1232:
1189:
1185:
1145:
1141:
1036:
418:
391:
386:
381:
371:
341:
227:
86:
4262:
3953:
3924:
3717:
3642:
3547:
3494:
3283:
3254:
2856:
2818:
2808:
2780:
2586:
2351:
2182:
2147:
1907:
4774:
4625:
4600:
4480:"Dissolved Organic Matter in the Ocean: A Controversy Stimulates New Insights"
2619:
Hansell, Dennis A. (2013). "Recalcitrant Dissolved Organic Carbon Fractions".
2504:
2356:
2008 2nd International Conference on Bioinformatics and Biomedical Engineering
2068:
1540:
1536:
1484:) state. The lytic cycle causes disruption of the cell(s) and release of DOC.
1416:
1271:
1173:
1149:
1117:
1113:
1109:
878:
823:
687:
366:
4887:
4782:
4496:
3632:
3509:"Exploring the oceanic microeukaryotic interactome with metaomics approaches"
3098:
2137:
2076:
1783:
Environmental processes controlling the apparent recalcitrance of oceanic DOC
4666:
4641:
4310:
4242:
4203:
3707:
3484:
3402:
2846:
2172:
1865:
1592:
coastal seawater, but reliable global estimates are also currently lacking.
1477:
1220:
1129:
4953:
4840:
4790:
4740:
4675:
4461:
4329:
3942:
3588:
3458:
Lønborg, C., Middelboe, M., and Brussaard, C. P. D. (2013). Viral lysis of
3410:
3272:
2640:
2576:
2542:
2453:
Protocols for the Joint Global Ocean Flux studies (JGOFS) core measurements
2409:
Narayana, P.S.; Varalakshmi, D; Pullaiah, T; Sambasiva Rao, K.R.S. (2018).
2363:
3507:
Krabberød, AK; Bjorbækmo, MFM; Shalchian-Tabrizi, K.; Logares, R. (2017).
4722:
4443:
3229:
Mentges, A.; Feenders, C.; Deutsch, C.; Blasius, B.; Dittmar, T. (2019).
3192:
1993:
1620:
1544:
1412:
1169:
842:
835:
4642:"Dilution limits dissolved organic carbon utilization in the deep ocean"
3580:
3535:
2534:
1200:, and some of these metabolites enter the DOC reservoir in groundwater.
4832:
4399:
3948:
3712:
3637:
3542:
3489:
3278:
2851:
2813:
2775:
2581:
2280:
2177:
2142:
1609:
1124:
During the decomposition of organic material, most carbon is lost as CO
811:
449:
232:
2207:
1822:
DOM is found in low concentrations in nature for direct analysis with
724:
as in the atmosphere and up to 20% of all organic carbon. In general,
4506:
4227:
3525:
3508:
3201:
3107:
2241:
1966:
1949:
1762:
1758:
1749:
1572:(CDOM) concentrations, shown here interfacing with ocean shelf water.
1101:
721:
611:
1727:
1673:
1554:
1515:
1500:
1486:
1481:
819:
783:
767:
746:
738:
606:
20:
3952:
Material was copied from this source, which is available under a
3716:
Material was copied from this source, which is available under a
3641:
Material was copied from this source, which is available under a
3546:
Material was copied from this source, which is available under a
3493:
Material was copied from this source, which is available under a
3282:
Material was copied from this source, which is available under a
2855:
Material was copied from this source, which is available under a
2817:
Material was copied from this source, which is available under a
2779:
Material was copied from this source, which is available under a
2585:
Material was copied from this source, which is available under a
2181:
Material was copied from this source, which is available under a
2146:
Material was copied from this source, which is available under a
1411:(bacteria and archaea) contribute to the DOC pool via release of
2450:
Knap, A. Michaels; A. Close; A. Ducklow; H. Dickson, A. (1994).
1564:
South-East Asia is home to one of the world's largest stores of
1339:
The four main processes removing DOC from the water column are:
1100:
in the soil solution, retention and translocation of nutrients (
1012:
Sources and sinks of dissolved organic carbon in the soil system
742:
1948:
Kenny, Jonathan E.; Bida, Morgan; Pagano, Todd (October 2014).
815:
1320:(e.g., microalgae, cyanobacteria, macrophytes), groundwater,
4372:"A cross-system analysis of labile dissolved organic carbon"
4286:"Hidden cycle of dissolved organic carbon in the deep ocean"
1144:
and release nutrients and pollutants that can contaminate
3894:
3892:
716:
systems and is one of the greatest cycled reservoirs of
4757:
Nebbioso, Antonio; Piccolo, Alessandro (January 2013).
4370:
Sondergaard, Morten; Mathias Middelboe (9 March 1995).
1258:
POC can be degraded to form DOC; DOC can become POC by
790:
Colour differences in DOC collected from coastal waters
3954:
Creative Commons Attribution 4.0 International License
3718:
Creative Commons Attribution 4.0 International License
3643:
Creative Commons Attribution 4.0 International License
3548:
Creative Commons Attribution 4.0 International License
3495:
Creative Commons Attribution 4.0 International License
3284:
Creative Commons Attribution 4.0 International License
2857:
Creative Commons Attribution 4.0 International License
2819:
Creative Commons Attribution 4.0 International License
2781:
Creative Commons Attribution 4.0 International License
2587:
Creative Commons Attribution 4.0 International License
2183:
Creative Commons Attribution 3.0 International License
2148:
Creative Commons Attribution 4.0 International License
856:
A practical definition of dissolved typically used in
4810:
4808:
2008:"Global biogeochemical cycles: progress and problems"
1846:
is considered as the cheapest and easiest technique.
1493:
DOC net production, transport and export in the ocean
3376:
3374:
2515:
2513:
2302:Cheremisinoff, Nicholas; Davletshin, Anton (2015).
1452:Zooplankton-mediated release of DOC occurs through
4907:Biogeochemistry of Marine Dissolved Organic Matter
4568:Biogeochemistry of Marine Dissolved Organic Matter
3964:
3962:
3139:Biogeochemistry of Marine Dissolved Organic Matter
2472:Biogeochemistry of Marine Dissolved Organic Matter
1262:. Inorganic and organic carbon are linked through
794:indicating a low soil-derived carbon contribution.
1561:Peatland river water draining into coastal waters
1507:Simplified microbial food web in the sunlit ocean
690:. The fraction remaining on the filter is called
2350:Wu, Qing; Zhao, Xin-Hua; Wang, Xiao-Dan (2008).
4473:
4471:
4290:Proceedings of the National Academy of Sciences
4241:Khatiwala, S.; Primeau, F.; Holzer, M. (2012).
2829:
2827:
2597:
2595:
1982:Journal of Geophysical Research: Biogeosciences
4821:Environmental Science: Processes & Impacts
3224:
3222:
3220:
3132:
3130:
3128:
3126:
2614:
2612:
2610:
2608:
2437:"Whatman glass microfiber filters, Grade GF/F"
2120:
2118:
2116:
2114:
1918:
1916:
1164:and percolates through the soil column to the
893:DOC pool spectrum from labile to recalcitrant
798:DOC is a basic nutrient, supporting growth of
3680:
3678:
3614:
3612:
3610:
3608:
3606:
2867:
2865:
2112:
2110:
2108:
2106:
2104:
2102:
2100:
2098:
2096:
2094:
1363:In marine systems DOC originates from either
653:
8:
3335:
3333:
2917:
2915:
2753:
2751:
2749:
1071:Inland waters primarily receive carbon from
720:on Earth, accounting for the same amount of
2791:
2789:
2652:
2650:
1733:Change in the composition of DOC with depth
774:Size and classification of marine particles
1623:to particles; (3) abiotic degradation via
1128:to the atmosphere by microbial oxidation.
802:and plays an important role in the global
756:, and is a major component of the Earth's
660:
646:
33:
27:Net ocean DOC production and export fluxes
4752:
4750:
4730:
4665:
4624:
4505:
4495:
4451:
4398:
4319:
4309:
3932:
3534:
3524:
3262:
3200:
3106:
1965:
1376:, terrestrial DOC also includes material
4904:Hansell DA and Carlson CA (Eds.) (2014)
3861:
3859:
3816:
3814:
3062:
3060:
3021:
3019:
2939:
2937:
888:
3849:
3847:
3845:
1887:
1771:
1645:
597:Territorialisation of carbon governance
41:
4763:Analytical and Bioanalytical Chemistry
4703:Applied and Environmental Microbiology
4424:Applied and Environmental Microbiology
2415:. Scientific Publishers. p. 225.
1657:Removal of refractory DOC in the ocean
1035:Origins and bioavailability of DOC in
4414:Gruber, David F.; Jean-Paul Simjouw;
2470:. In: Hansell D and Carlson C (Eds.)
1810:to the DOM pool under consideration.
602:Total Carbon Column Observing Network
7:
2633:10.1146/annurev-marine-120710-100757
1148:, whereas runoff transports DOM and
4247:Earth and Planetary Science Letters
3899:Shen, Yuan; Benner, Ronald (2018).
2006:Hedges, John I. (3 December 1991).
1243:and a negligibly small fraction of
1152:to other areas, rivers, and lakes.
4910:, Second edition, Academic Press.
4576:10.1016/B978-0-12-405940-5.00007-8
4047:10.1111/j.1751-1097.1996.tb03086.x
3886:10.1016/B978-0-12-405940-5.00003-0
3866:10.1016/B978-0-12-405940-5.00008-X
3147:10.1016/B978-0-12-405940-5.00003-0
1053:Freshwater DOC sources and sinks
14:
2161:Nonlinear Processes in Geophysics
1570:coloured dissolved organic matter
1423:, as well as via mortality (e.g.
3947:
3711:
3636:
3541:
3488:
3277:
2850:
2812:
2774:
2723:10.1016/j.orggeochem.2017.09.008
2685:10.1016/B978-012256371-3/50018-4
2580:
2396:"Dissolved Organic Carbon (DOC)"
2176:
2141:
1774:
1648:
1303:
1227:), DIC consists of carbonate (CO
1059:
1028:
1005:
778:Adapted from Simon et al., 2002.
627:
626:
49:
4134:University of Texas at Austin).
4096:10.1016/j.scitotenv.2015.12.047
3785:10.1016/j.scitotenv.2006.05.009
2621:Annual Review of Marine Science
2493:Geochimica et Cosmochimica Acta
2412:Research Methodology in Zoology
4418:; Gary L. Taghon (June 2006).
4379:Marine Ecology Progress Series
1602:submarine hydrothermal systems
1435:Phytoplankton produces DOC by
698:Dissolved organic matter (DOM)
562:Climate reconstruction proxies
1:
4946:10.1126/science.328.5985.1476
4880:10.1016/j.marchem.2014.01.012
4357:10.1016/S0304-4203(96)00075-8
4192:10.1016/j.marchem.2004.02.014
4018:10.1016/S0043-1354(00)00033-6
16:Organic carbon classification
4599:Jannasch, Holger W. (1967).
3359:10.1016/0198-0149(89)90001-0
3173:Geophysical Research Letters
2027:10.1016/0304-4203(92)90096-s
1297:Ocean DOC sources and sinks
728:compounds are the result of
532:Carbonate compensation depth
197:Particulate inorganic carbon
3621:Frontiers in Marine Science
3045:10.1016/j.jembe.2007.05.024
2771:10.1590/1678-992x-2018-0164
2523:Nature Reviews Microbiology
2474:, pages 579–610, Elsevier.
2126:Frontiers in Marine Science
999:Soil DOC sources and sinks
974:tens of thousands of years
4997:
4605:Limnology and Oceanography
4263:10.1016/j.epsl.2012.01.038
3925:10.1038/s41598-018-20857-5
3255:10.1038/s41598-019-54290-z
3035:10.1016/j.ecss.2009.02.026
2835:Frontiers in plant science
2809:10.1038/s41467-019-11394-4
2049:Limnology and Oceanography
1908:10.1038/s41467-017-02227-3
1861:Dissolved inorganic carbon
1818:DOM isolation and analysis
1214:particulate organic carbon
849:The dissolved fraction of
692:particulate organic carbon
587:Carbon capture and storage
191:Particulate organic carbon
185:Dissolved inorganic carbon
4775:10.1007/s00216-012-6363-2
4626:10.4319/lo.1967.12.2.0264
4173:10.4319/lo.2002.47.2.0343
4154:10.4319/lo.1997.42.6.1317
4144:10.1007/s00027-008-8082-5
4086:10.4319/lo.1997.42.6.1454
4076:10.4319/lo.2000.45.6.1254
4028:10.4319/lo.1996.41.5.1024
3821:10.1016/j.gca.2006.04.031
3730:10.4319/lo.2001.46.7.1734
3513:Aquatic Microbial Ecology
3296:10.4319/lo.1998.43.6.1270
2964:10.4319/lo.2007.52.3.1208
2881:10.1007/s10021-006-9013-8
2675:10.4319/lo.1999.44.1.0062
2602:10.1007/s10533-010-9419-4
2505:10.1016/j.gca.2005.08.024
2468:"DOM in the Coastal Zone"
2196:Aquatic microbial ecology
2069:10.4319/lo.2004.49.2.0588
1707:), and nutrient salts (NH
1372:addition to soil derived
1104:), and immobilization of
1068:DOC and POC — DIC and PIC
891:
592:Carbon cycle re-balancing
4976:Water quality indicators
4497:10.5670/oceanog.2009.109
3633:10.3389/fmars.2020.00341
3099:10.5670/oceanog.2009.109
2308:Environmental Management
2138:10.3389/fmars.2020.00466
1042:dissolved organic matter
673:Dissolved organic carbon
567:Carbon-to-nitrogen ratio
527:Carbonate–silicate cycle
495:Carbon dioxide clathrate
490:Clathrate gun hypothesis
318:Net ecosystem production
179:Dissolved organic carbon
4971:Environmental chemistry
4667:10.1126/science.1258955
4311:10.1073/pnas.1407445111
4255:2012E&PSL.325..116K
4106:10.5194/hess-7-390-2003
3708:10.5194/bg-15-6847-2018
3485:10.5670/oceanog.2001.05
3403:10.1126/science.1057627
2847:10.3389/fpls.2018.00629
2331:Elser, Stephen (2014).
2173:10.5194/npg-24-293-2017
1928:Bio-geochemical Methods
1690:colored fraction of DOC
1625:photochemical reactions
1382:volatile organic carbon
1022:Groundwater DOC sources
869:Labile and recalcitrant
577:Deep Carbon Observatory
37:Part of a series on the
3340:10.1093/plankt/19.1.97
2577:10.5194/bg-17-135-2020
2364:10.1109/ICBBE.2008.336
2358:. pp. 4713–4716.
1844:solid-phase extraction
1840:solid-phase extraction
1735:
1573:
1527:
1513:
1498:
1073:terrestrial ecosystems
987:Terrestrial ecosystems
795:
781:
397:Continental shelf pump
173:Total inorganic carbon
139:Satellite measurements
31:
2339:on 25 September 2017.
1896:Nature Communications
1731:
1558:
1519:
1504:
1490:
1282:in aquatic habitats.
1204:Freshwater ecosystems
1132:and landscape slope,
787:
771:
684:operationally defined
679:) is the fraction of
582:Global Carbon Project
313:Ecosystem respiration
24:
4723:10.1128/AEM.02070-15
4570:. pp. 369–388.
4444:10.1128/AEM.02882-05
4249:. 325–326: 116–125.
3977:Tranvik, L. J., and
3876:10.1029/2012GB004353
3794:Longnecker, K., and
3193:10.1002/2016GL071348
2743:10.1002/2014GL062762
1994:10.1002/2016JG003493
1876:Total organic carbon
1460:Bacteria and viruses
1405:microbial production
1280:carbon sequestration
1270:(P) by for instance
851:total organic carbon
834:consists of organic
411:Carbon sequestration
167:Total organic carbon
4938:2010Sci...328.1476S
4932:(5985): 1476–1477.
4872:2014MarCh.161...14G
4715:2015ApEnM..81.7385T
4658:2015Sci...348..331A
4617:1967LimOc..12..264J
4436:2006ApEnM..72.4184G
4416:Sybil P. Seitzinger
4391:1995MEPS..118..283S
4302:2014PNAS..11116706F
4296:(47): 16706–16711.
4220:2016NatGe...9..888W
3917:2018NatSR...8.2542S
3581:10.1038/nature04157
3573:2005Natur.437..336D
3395:2001Sci...292..917O
3247:2019NatSR...917780M
3185:2017GeoRL..44.2407Z
3141:. pp. 65–126.
2535:10.1038/nrmicro2386
2234:1991Natur.352..612K
2061:2004LimOc..49..588K
1669:Thermal degradation
1642:Thermal degradation
1397:zooplankton grazing
1326:zooplankton grazing
1098:acid-base reactions
1080:P = photosynthesis
961:thousands of years
877:DOC is also called
708:DOC is abundant in
458:Atmospheric methane
424:Soil carbon storage
274:Reverse Krebs cycle
129:Ocean acidification
4833:10.1039/C4EM00062E
4400:10.3354/meps118283
3905:Scientific Reports
3460:Micromonas pusilla
3235:Scientific Reports
2281:10.1007/BF00391067
2265:Haliotis rufescens
1736:
1636:marine prokaryotes
1629:biotic degradation
1574:
1528:
1514:
1499:
1421:hydrolytic enzymes
1393:primary production
1330:hydrothermal vents
941:semi-recalcitrant
796:
782:
747:terrestrial plants
537:Great Calcite Belt
485:Aerobic production
305:Carbon respiration
247:Metabolic pathways
207:Primary production
32:
4709:(21): 7385–7393.
4652:(6232): 331–333.
4208:Nature Geoscience
4066:10.1029/94GL03344
3808:10.1002/lno.11028
3796:Kujawinski, E. B.
3567:(7057): 336–342.
3389:(5518): 917–920.
2759:Scientia Agricola
2373:978-1-4244-1747-6
2228:(6336): 612–614.
2208:10.3354/ame028175
1960:(10): 2862–2897.
1566:tropical peatland
1480:) or productive (
1401:hydrothermal vent
1324:processes (e.g.,
1318:primary producers
1290:Marine ecosystems
1264:aquatic organisms
980:
979:
969:highly resistant
779:
670:
669:
468:Methane emissions
124:In the atmosphere
4988:
4957:
4892:
4891:
4860:Marine Chemistry
4851:
4845:
4844:
4827:(9): 2064–2079.
4812:
4803:
4802:
4754:
4745:
4744:
4734:
4694:
4688:
4687:
4669:
4637:
4631:
4630:
4628:
4596:
4590:
4589:
4563:
4557:
4554:
4548:
4545:
4539:
4536:
4530:
4527:
4521:
4518:
4512:
4511:
4509:
4499:
4475:
4466:
4465:
4455:
4430:(6): 4184–4191.
4411:
4405:
4404:
4402:
4376:
4367:
4361:
4360:
4351:(3–4): 265–277.
4345:Marine Chemistry
4340:
4334:
4333:
4323:
4313:
4281:
4275:
4274:
4238:
4232:
4231:
4228:10.1038/ngeo2830
4199:
4193:
4189:
4183:
4180:
4174:
4170:
4164:
4161:
4155:
4151:
4145:
4141:
4135:
4131:
4125:
4122:
4116:
4113:
4107:
4103:
4097:
4093:
4087:
4083:
4077:
4073:
4067:
4063:
4057:
4054:
4048:
4044:
4038:
4035:
4029:
4025:
4019:
4015:
4009:
4006:
4000:
3997:
3991:
3988:
3982:
3975:
3969:
3966:
3957:
3951:
3946:
3936:
3896:
3887:
3883:
3877:
3873:
3867:
3863:
3854:
3851:
3840:
3837:
3831:
3828:
3822:
3818:
3809:
3805:
3799:
3792:
3786:
3782:
3776:
3773:
3767:
3764:
3758:
3755:
3749:
3746:
3740:
3737:
3731:
3727:
3721:
3715:
3702:(2): 6847–6865.
3691:
3685:
3682:
3673:
3670:
3664:
3661:
3655:
3652:
3646:
3640:
3616:
3601:
3600:
3556:
3550:
3545:
3540:
3538:
3528:
3526:10.3354/ame01811
3504:
3498:
3492:
3469:
3463:
3456:
3450:
3447:
3441:
3438:
3432:
3429:
3423:
3422:
3378:
3369:
3366:
3360:
3356:
3350:
3347:
3341:
3337:
3328:
3321:
3315:
3312:
3306:
3303:
3297:
3293:
3287:
3281:
3276:
3266:
3226:
3215:
3214:
3204:
3179:(5): 2407–2415.
3167:
3161:
3160:
3134:
3121:
3120:
3110:
3082:
3076:
3073:
3067:
3064:
3055:
3052:
3046:
3042:
3036:
3032:
3026:
3023:
3014:
2999:
2993:
2992:10.1038/ngeo1830
2989:
2983:
2980:
2974:
2971:
2965:
2961:
2955:
2951:
2945:
2941:
2932:
2929:
2923:
2919:
2910:
2906:
2900:
2897:
2891:
2888:
2882:
2878:
2872:
2869:
2860:
2854:
2831:
2822:
2816:
2793:
2784:
2778:
2755:
2744:
2740:
2734:
2733:10.1038/ngeo1817
2730:
2724:
2720:
2714:
2711:
2705:
2701:
2695:
2692:
2686:
2682:
2676:
2672:
2666:
2663:
2657:
2654:
2645:
2644:
2616:
2603:
2599:
2590:
2584:
2561:
2555:
2554:
2517:
2508:
2489:
2483:
2466:Cauwet G (2002)
2464:
2458:
2457:
2447:
2441:
2440:
2433:
2427:
2426:
2406:
2400:
2399:
2392:
2386:
2385:
2347:
2341:
2340:
2335:. Archived from
2328:
2322:
2321:
2299:
2293:
2292:
2260:
2254:
2253:
2242:10.1038/352612a0
2217:
2211:
2192:
2186:
2180:
2157:
2151:
2145:
2122:
2089:
2088:
2046:
2037:
2031:
2030:
2015:Marine Chemistry
2012:
2003:
1997:
1988:(5): 1175–1191.
1978:
1972:
1971:
1969:
1967:10.3390/w6102862
1945:
1939:
1938:
1936:
1934:
1924:"Organic Carbon"
1920:
1911:
1892:
1856:Blackwater river
1778:
1724:Recalcitrant DOC
1719:
1718:
1701:Photodegradation
1696:Photodegradation
1652:
1577:Marine sediments
1551:Marine sediments
1374:humic substances
1341:photodegradation
1307:
1266:. CO is used in
1083:
1079:
1063:
1032:
1009:
933:weeks to months
889:
858:marine chemistry
777:
754:marine food webs
662:
655:
648:
635:
630:
629:
434:pelagic sediment
328:Soil respiration
323:Photorespiration
53:
34:
4996:
4995:
4991:
4990:
4989:
4987:
4986:
4985:
4981:Water chemistry
4961:
4960:
4921:
4901:
4896:
4895:
4853:
4852:
4848:
4814:
4813:
4806:
4756:
4755:
4748:
4696:
4695:
4691:
4639:
4638:
4634:
4598:
4597:
4593:
4586:
4565:
4564:
4560:
4555:
4551:
4546:
4542:
4537:
4533:
4528:
4524:
4519:
4515:
4477:
4476:
4469:
4413:
4412:
4408:
4374:
4369:
4368:
4364:
4342:
4341:
4337:
4283:
4282:
4278:
4240:
4239:
4235:
4214:(12): 888–891.
4201:
4200:
4196:
4190:
4186:
4181:
4177:
4171:
4167:
4162:
4158:
4152:
4148:
4142:
4138:
4132:
4128:
4123:
4119:
4114:
4110:
4104:
4100:
4094:
4090:
4084:
4080:
4074:
4070:
4064:
4060:
4055:
4051:
4045:
4041:
4036:
4032:
4026:
4022:
4016:
4012:
4007:
4003:
3998:
3994:
3989:
3985:
3979:Sieburth, J. M.
3976:
3972:
3967:
3960:
3898:
3897:
3890:
3884:
3880:
3874:
3870:
3864:
3857:
3852:
3843:
3838:
3834:
3829:
3825:
3819:
3812:
3806:
3802:
3793:
3789:
3783:
3779:
3774:
3770:
3765:
3761:
3756:
3752:
3747:
3743:
3738:
3734:
3728:
3724:
3692:
3688:
3683:
3676:
3671:
3667:
3662:
3658:
3653:
3649:
3617:
3604:
3558:
3557:
3553:
3506:
3505:
3501:
3470:
3466:
3457:
3453:
3448:
3444:
3439:
3435:
3430:
3426:
3380:
3379:
3372:
3367:
3363:
3357:
3353:
3348:
3344:
3338:
3331:
3322:
3318:
3313:
3309:
3304:
3300:
3294:
3290:
3228:
3227:
3218:
3169:
3168:
3164:
3157:
3136:
3135:
3124:
3084:
3083:
3079:
3074:
3070:
3065:
3058:
3053:
3049:
3043:
3039:
3033:
3029:
3024:
3017:
3012:
3008:
3004:
3000:
2996:
2990:
2986:
2981:
2977:
2972:
2968:
2962:
2958:
2952:
2948:
2942:
2935:
2930:
2926:
2920:
2913:
2907:
2903:
2898:
2894:
2889:
2885:
2879:
2875:
2870:
2863:
2832:
2825:
2797:Biogeochemistry
2794:
2787:
2756:
2747:
2741:
2737:
2731:
2727:
2721:
2717:
2712:
2708:
2702:
2698:
2693:
2689:
2683:
2679:
2673:
2669:
2664:
2660:
2655:
2648:
2618:
2617:
2606:
2600:
2593:
2562:
2558:
2519:
2518:
2511:
2490:
2486:
2465:
2461:
2449:
2448:
2444:
2435:
2434:
2430:
2423:
2408:
2407:
2403:
2394:
2393:
2389:
2374:
2349:
2348:
2344:
2330:
2329:
2325:
2318:
2301:
2300:
2296:
2262:
2261:
2257:
2219:
2218:
2214:
2193:
2189:
2158:
2154:
2123:
2092:
2044:
2039:
2038:
2034:
2010:
2005:
2004:
2000:
1979:
1975:
1947:
1946:
1942:
1932:
1930:
1922:
1921:
1914:
1893:
1889:
1884:
1852:
1836:reverse osmosis
1832:ultrafiltration
1820:
1799:
1788:
1785:
1779:
1755:marine bacteria
1745:
1734:
1726:
1717:
1714:
1713:
1712:
1698:
1686:
1664:
1663:
1659:
1653:
1644:
1598:
1563:
1553:
1533:
1524:
1511:
1509:
1495:
1462:
1450:
1433:
1361:
1356:
1355:
1354:
1353:
1352:
1338:
1333:
1315:
1308:
1299:
1298:
1292:
1254:
1250:
1242:
1238:
1230:
1226:
1206:
1194:bioavailability
1158:
1127:
1094:denitrification
1089:
1088:
1087:
1086:
1085:
1084:R = respiration
1081:
1077:
1076:
1070:
1064:
1055:
1054:
1048:
1047:
1046:
1045:
1044:
1039:
1033:
1024:
1023:
1017:
1016:
1015:
1014:
1013:
1010:
1001:
1000:
994:
989:
894:
871:
792:
780:
776:
766:
666:
625:
618:
617:
616:
556:
548:
547:
546:
511:
501:
500:
499:
452:
442:
441:
440:
429:Marine sediment
413:
403:
402:
401:
362:Solubility pump
350:Biological pump
344:
334:
333:
332:
307:
297:
296:
295:
279:Carbon fixation
264:
249:
239:
238:
237:
218:
202:
155:
153:Forms of carbon
145:
144:
143:
118:
108:
107:
106:
61:
29:
17:
12:
11:
5:
4994:
4992:
4984:
4983:
4978:
4973:
4963:
4962:
4959:
4958:
4919:
4900:
4899:External links
4897:
4894:
4893:
4846:
4804:
4769:(1): 109–124.
4746:
4689:
4632:
4611:(2): 264–271.
4591:
4584:
4558:
4549:
4540:
4531:
4522:
4513:
4490:(4): 202–211.
4467:
4406:
4362:
4335:
4276:
4233:
4194:
4184:
4175:
4165:
4156:
4146:
4136:
4126:
4117:
4108:
4098:
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4078:
4068:
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4049:
4039:
4030:
4020:
4010:
4001:
3992:
3983:
3970:
3958:
3888:
3878:
3868:
3855:
3841:
3832:
3823:
3810:
3800:
3787:
3777:
3768:
3759:
3750:
3741:
3732:
3722:
3696:Biogeosciences
3686:
3674:
3665:
3656:
3647:
3602:
3551:
3499:
3464:
3451:
3442:
3433:
3424:
3370:
3361:
3351:
3342:
3329:
3316:
3307:
3298:
3288:
3216:
3162:
3155:
3122:
3093:(4): 202–211.
3077:
3068:
3056:
3047:
3037:
3027:
3015:
3010:
3006:
3002:
2994:
2984:
2975:
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2924:
2911:
2901:
2892:
2883:
2873:
2861:
2823:
2785:
2745:
2735:
2725:
2715:
2706:
2704:Science/AAAS).
2696:
2687:
2677:
2667:
2658:
2646:
2604:
2591:
2565:Biogeosciences
2556:
2529:(8): 593–599.
2509:
2499:(1): 133–146.
2484:
2459:
2442:
2428:
2421:
2401:
2387:
2372:
2342:
2323:
2316:
2294:
2269:Marine Biology
2255:
2212:
2187:
2167:(2): 293–305.
2152:
2090:
2055:(2): 588–596.
2032:
2021:(1–3): 67–93.
1998:
1973:
1940:
1912:
1886:
1885:
1883:
1880:
1879:
1878:
1873:
1871:Microbial loop
1868:
1863:
1858:
1851:
1848:
1819:
1816:
1798:
1795:
1790:
1789:
1781:
1780:
1773:
1744:
1741:
1732:
1725:
1722:
1715:
1697:
1694:
1685:
1682:
1678:filter feeders
1666:
1665:
1660:
1655:
1654:
1647:
1643:
1640:
1617:microparticles
1597:
1594:
1559:
1552:
1549:
1532:
1529:
1520:
1505:
1491:
1461:
1458:
1454:sloppy feeding
1449:
1446:
1432:
1429:
1389:marine biomass
1360:
1357:
1343:(particularly
1334:
1311:
1309:
1302:
1301:
1300:
1296:
1295:
1294:
1293:
1291:
1288:
1274:, produced by
1268:photosynthesis
1252:
1248:
1240:
1236:
1228:
1224:
1210:Organic carbon
1205:
1202:
1178:biodegradation
1166:saturated zone
1157:
1154:
1125:
1066:
1065:
1058:
1057:
1056:
1052:
1051:
1050:
1049:
1034:
1027:
1026:
1025:
1021:
1020:
1019:
1018:
1011:
1004:
1003:
1002:
998:
997:
996:
995:
993:
990:
988:
985:
978:
977:
975:
972:
970:
966:
965:
962:
959:
956:
952:
951:
948:
945:
942:
938:
937:
934:
931:
928:
924:
923:
922:< 200 Tg C
920:
919:hours to days
917:
914:
910:
909:
906:
905:turnover time
903:
900:
896:
895:
892:
870:
867:
808:microbial loop
800:microorganisms
788:
772:
765:
762:
758:carbon cycling
735:aquatic plants
726:organic carbon
718:organic matter
681:organic carbon
668:
667:
665:
664:
657:
650:
642:
639:
638:
637:
636:
620:
619:
615:
614:
609:
604:
599:
594:
589:
584:
579:
574:
572:Deep biosphere
569:
564:
558:
557:
554:
553:
550:
549:
545:
544:
542:Redfield ratio
539:
534:
529:
524:
522:Nutrient cycle
519:
513:
512:
509:Biogeochemical
507:
506:
503:
502:
498:
497:
492:
487:
482:
481:
480:
475:
465:
463:Methanogenesis
460:
454:
453:
448:
447:
444:
443:
439:
438:
437:
436:
426:
421:
415:
414:
409:
408:
405:
404:
400:
399:
394:
389:
384:
379:
377:Microbial loop
374:
369:
364:
359:
358:
357:
346:
345:
340:
339:
336:
335:
331:
330:
325:
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303:
302:
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298:
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292:
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262:
260:Chemosynthesis
257:
255:Photosynthesis
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116:Carbon dioxide
114:
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84:
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63:
62:
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2:
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4955:
4951:
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4920:
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4916:9780124071537
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4585:9780124059405
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2824:
2820:
2815:
2810:
2806:
2802:
2798:
2792:
2790:
2786:
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2777:
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2754:
2752:
2750:
2746:
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2736:
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2726:
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2716:
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2707:
2700:
2697:
2691:
2688:
2681:
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2671:
2668:
2662:
2659:
2653:
2651:
2647:
2642:
2638:
2634:
2630:
2626:
2622:
2615:
2613:
2611:
2609:
2605:
2598:
2596:
2592:
2588:
2583:
2578:
2574:
2570:
2566:
2560:
2557:
2552:
2548:
2544:
2540:
2536:
2532:
2528:
2524:
2516:
2514:
2510:
2506:
2502:
2498:
2494:
2488:
2485:
2481:
2480:9780080500119
2477:
2473:
2469:
2463:
2460:
2455:
2454:
2446:
2443:
2438:
2432:
2429:
2424:
2422:9789388172400
2418:
2414:
2413:
2405:
2402:
2397:
2391:
2388:
2383:
2379:
2375:
2369:
2365:
2361:
2357:
2353:
2346:
2343:
2338:
2334:
2327:
2324:
2319:
2317:9781119099994
2313:
2309:
2305:
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2290:
2286:
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2278:
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2270:
2266:
2259:
2256:
2251:
2247:
2243:
2239:
2235:
2231:
2227:
2223:
2216:
2213:
2209:
2205:
2201:
2197:
2191:
2188:
2184:
2179:
2174:
2170:
2166:
2162:
2156:
2153:
2149:
2144:
2139:
2135:
2131:
2127:
2121:
2119:
2117:
2115:
2113:
2111:
2109:
2107:
2105:
2103:
2101:
2099:
2097:
2095:
2091:
2086:
2082:
2078:
2074:
2070:
2066:
2062:
2058:
2054:
2050:
2043:
2036:
2033:
2028:
2024:
2020:
2016:
2009:
2002:
1999:
1995:
1991:
1987:
1983:
1977:
1974:
1968:
1963:
1959:
1955:
1951:
1944:
1941:
1929:
1925:
1919:
1917:
1913:
1909:
1905:
1901:
1897:
1891:
1888:
1881:
1877:
1874:
1872:
1869:
1867:
1864:
1862:
1859:
1857:
1854:
1853:
1849:
1847:
1845:
1842:. Among them
1841:
1837:
1833:
1829:
1825:
1817:
1815:
1811:
1807:
1803:
1796:
1794:
1784:
1777:
1772:
1770:
1768:
1764:
1760:
1756:
1751:
1742:
1740:
1730:
1723:
1721:
1710:
1706:
1702:
1695:
1693:
1691:
1683:
1681:
1679:
1675:
1670:
1658:
1651:
1646:
1641:
1639:
1637:
1634:
1633:heterotrophic
1630:
1626:
1622:
1618:
1614:
1611:
1607:
1604:; (2) bubble
1603:
1595:
1593:
1590:
1586:
1582:
1578:
1571:
1567:
1562:
1557:
1550:
1548:
1546:
1542:
1538:
1530:
1523:
1518:
1508:
1503:
1494:
1489:
1485:
1483:
1479:
1475:
1474:peptidoglycan
1471:
1467:
1466:cell division
1459:
1457:
1455:
1447:
1445:
1443:
1438:
1437:extracellular
1431:Phytoplankton
1430:
1428:
1426:
1422:
1418:
1414:
1410:
1406:
1402:
1398:
1394:
1390:
1385:
1383:
1379:
1375:
1370:
1369:allochthonous
1366:
1365:autochthonous
1358:
1350:
1346:
1342:
1337:
1331:
1327:
1323:
1319:
1314:
1306:
1289:
1287:
1283:
1281:
1277:
1273:
1269:
1265:
1261:
1256:
1246:
1245:carbonic acid
1234:
1222:
1217:
1215:
1211:
1203:
1201:
1199:
1198:soil microbes
1195:
1191:
1187:
1183:
1179:
1175:
1171:
1167:
1163:
1155:
1153:
1151:
1147:
1143:
1139:
1135:
1131:
1122:
1119:
1115:
1111:
1107:
1103:
1099:
1095:
1074:
1069:
1062:
1043:
1038:
1031:
1008:
991:
986:
984:
976:
973:
971:
968:
967:
963:
960:
957:
955:recalcitrant
954:
953:
949:
946:
943:
940:
939:
935:
932:
929:
926:
925:
921:
918:
915:
912:
911:
907:
904:
901:
899:DOC fraction
898:
897:
890:
887:
883:
880:
876:
868:
866:
864:
859:
854:
852:
847:
844:
841:
840:heterotrophic
837:
833:
832:BDOC fraction
828:
825:
821:
817:
813:
809:
805:
801:
791:
786:
775:
770:
763:
761:
759:
755:
750:
748:
744:
740:
736:
731:
730:decomposition
727:
723:
719:
715:
711:
706:
704:
699:
695:
693:
689:
685:
682:
678:
674:
663:
658:
656:
651:
649:
644:
643:
641:
640:
634:
624:
623:
622:
621:
613:
610:
608:
605:
603:
600:
598:
595:
593:
590:
588:
585:
583:
580:
578:
575:
573:
570:
568:
565:
563:
560:
559:
552:
551:
543:
540:
538:
535:
533:
530:
528:
525:
523:
520:
518:
517:Marine cycles
515:
514:
510:
505:
504:
496:
493:
491:
488:
486:
483:
479:
476:
474:
471:
470:
469:
466:
464:
461:
459:
456:
455:
451:
446:
445:
435:
432:
431:
430:
427:
425:
422:
420:
417:
416:
412:
407:
406:
398:
395:
393:
390:
388:
385:
383:
380:
378:
375:
373:
370:
368:
365:
363:
360:
356:
353:
352:
351:
348:
347:
343:
338:
337:
329:
326:
324:
321:
319:
316:
314:
311:
310:
306:
301:
300:
290:
287:
285:
282:
281:
280:
277:
275:
272:
270:
267:
266:
261:
258:
256:
253:
252:
248:
243:
242:
234:
231:
229:
226:
224:
221:
220:
213:
210:
209:
208:
205:
204:
198:
195:
192:
189:
186:
183:
180:
177:
174:
171:
168:
165:
162:
159:
158:
154:
149:
148:
140:
137:
135:
132:
130:
127:
125:
122:
121:
117:
112:
111:
103:
100:
98:
97:Boreal forest
95:
93:
90:
88:
85:
83:
80:
78:
75:
73:
70:
68:
65:
64:
57:
56:
52:
48:
47:
44:
40:
36:
35:
28:
23:
19:
4929:
4923:
4906:
4863:
4859:
4849:
4824:
4820:
4766:
4762:
4706:
4702:
4692:
4649:
4645:
4635:
4608:
4604:
4594:
4567:
4561:
4552:
4543:
4534:
4525:
4516:
4487:
4484:Oceanography
4483:
4427:
4423:
4409:
4382:
4378:
4365:
4348:
4344:
4338:
4293:
4289:
4279:
4246:
4236:
4211:
4207:
4197:
4187:
4178:
4168:
4159:
4149:
4139:
4129:
4120:
4111:
4101:
4091:
4081:
4071:
4061:
4052:
4042:
4033:
4023:
4013:
4004:
3995:
3986:
3973:
3908:
3904:
3881:
3871:
3835:
3826:
3803:
3790:
3780:
3771:
3762:
3753:
3744:
3735:
3725:
3699:
3695:
3689:
3668:
3659:
3650:
3624:
3620:
3564:
3560:
3554:
3536:10261/153315
3516:
3512:
3502:
3479:(4): 41–49.
3476:
3473:Oceanography
3472:
3467:
3459:
3454:
3445:
3436:
3427:
3386:
3382:
3364:
3354:
3345:
3324:
3319:
3310:
3301:
3291:
3241:(1): 17780.
3238:
3234:
3176:
3172:
3165:
3138:
3090:
3087:Oceanography
3086:
3080:
3071:
3050:
3040:
3030:
2997:
2987:
2978:
2969:
2959:
2949:
2927:
2904:
2895:
2886:
2876:
2838:
2834:
2803:(1): 61–78.
2800:
2796:
2762:
2758:
2738:
2728:
2718:
2709:
2699:
2690:
2680:
2670:
2661:
2624:
2620:
2568:
2564:
2559:
2526:
2522:
2496:
2492:
2487:
2471:
2462:
2452:
2445:
2431:
2411:
2404:
2390:
2355:
2345:
2337:the original
2326:
2307:
2297:
2272:
2268:
2264:
2258:
2225:
2221:
2215:
2199:
2195:
2190:
2164:
2160:
2155:
2129:
2125:
2052:
2048:
2035:
2018:
2014:
2001:
1985:
1981:
1976:
1957:
1953:
1943:
1931:. Retrieved
1927:
1899:
1895:
1890:
1821:
1812:
1808:
1804:
1800:
1791:
1782:
1746:
1743:Distribution
1737:
1708:
1704:
1699:
1687:
1667:
1656:
1613:flocculation
1599:
1589:groundwaters
1585:ocean basins
1581:water column
1575:
1560:
1534:
1526:oceanic DOC.
1521:
1506:
1492:
1463:
1451:
1434:
1386:
1362:
1345:UV-radiation
1335:
1313:Main sources
1312:
1284:
1260:flocculation
1257:
1218:
1207:
1182:biosynthesis
1162:plant litter
1159:
1123:
1106:heavy metals
1090:
1067:
981:
964:~63000 Tg C
927:semi-labile
884:
875:Recalcitrant
872:
855:
848:
831:
829:
806:through the
804:carbon cycle
797:
789:
773:
751:
707:
702:
697:
696:
676:
672:
671:
355:Martin curve
342:Carbon pumps
269:Calvin cycle
223:Black carbon
178:
161:Total carbon
102:Geochemistry
43:Carbon cycle
26:
18:
4385:: 283–294.
3911:(1): 2542.
3325:Phaeocystis
2627:: 421–445.
2202:: 175–211.
1933:27 November
1797:As emergent
1767:humic acids
1606:coagulation
1537:macrophytes
1531:Macrophytes
1470:viral lysis
1448:Zooplankton
1425:viral shunt
1417:exopolymers
1409:Prokaryotes
1403:input, and
1349:prokaryotes
1276:respiration
1272:macrophytes
1233:bicarbonate
1223:(e.g., CaCO
1190:hydrophilic
1186:Hydrophobic
1156:Groundwater
1150:xenobiotics
1146:groundwater
1142:water table
1110:xenobiotics
1037:groundwater
950:~1400 Tg C
688:micrometers
419:Carbon sink
382:Viral shunt
372:Marine snow
228:Blue carbon
82:Deep carbon
77:Atmospheric
67:Terrestrial
4965:Categories
1902:(1): 1–8.
1882:References
1627:; and (4)
1541:macroalgae
1415:material,
1336:Main sinks
1322:food chain
1221:carbonates
1174:desorption
1118:desorption
1114:adsorption
936:~600 Tg C
879:refractory
824:Everglades
714:freshwater
703:vice versa
392:Whale pump
387:Jelly pump
367:Lipid pump
92:Permafrost
60:By regions
4888:0304-4203
4866:: 14–19.
4783:1618-2642
4507:1912/3183
3202:1912/8912
3117:129511530
3108:1912/3183
2275:: 87–94.
2077:0024-3590
1866:Foam line
1478:lysogenic
1442:autolysis
1130:Soil type
1096:process,
836:molecules
4954:20558685
4841:24668418
4799:36714947
4791:22965531
4741:26253668
4684:28514618
4676:25883355
4462:16751530
4330:25385632
3943:29416076
3589:16163343
3519:: 1–12.
3419:36359472
3411:11340202
3273:31780725
3211:55057882
3005:, CO, CH
2944:115–122.
2909:117–161.
2641:22881353
2551:14616875
2543:20601964
2521:ocean".
2456:. JGOFS.
2439:. Merck.
2382:24876521
2289:84541307
2085:15021562
1850:See also
1621:sorption
1545:seagrass
1413:capsular
1170:sorption
1134:leaching
947:decades
902:acronym
843:bacteria
812:wetlands
764:Overview
633:Category
4934:Bibcode
4925:Science
4868:Bibcode
4732:4592861
4711:Bibcode
4654:Bibcode
4646:Science
4613:Bibcode
4453:1489638
4432:Bibcode
4387:Bibcode
4321:4250131
4298:Bibcode
4271:7017553
4251:Bibcode
4216:Bibcode
3934:5803198
3913:Bibcode
3597:4400950
3569:Bibcode
3391:Bibcode
3383:Science
3264:6883037
3243:Bibcode
3181:Bibcode
2841:: 629.
2250:4285758
2230:Bibcode
2132:: 466.
2057:Bibcode
1610:abiotic
1539:(i.e.,
1535:Marine
1378:leached
1359:Sources
1102:cations
913:labile
908:amount
694:(POC).
478:Wetland
450:Methane
233:Kerogen
134:Removal
4952:
4914:
4886:
4839:
4797:
4789:
4781:
4739:
4729:
4682:
4674:
4582:
4460:
4450:
4328:
4318:
4269:
3941:
3931:
3627::341.
3595:
3587:
3561:Nature
3417:
3409:
3271:
3261:
3209:
3153:
3115:
2954:32–49.
2922:83–94.
2639:
2549:
2541:
2478:
2419:
2380:
2370:
2314:
2287:
2248:
2222:Nature
2083:
2075:
1838:, and
1763:pollen
1759:lignin
1750:labile
1419:, and
1138:runoff
1136:, and
944:DOCSR
930:DOCSL
820:swamps
722:carbon
710:marine
631:
612:CO2SYS
473:Arctic
212:marine
72:Marine
4795:S2CID
4680:S2CID
4375:(PDF)
4267:S2CID
3593:S2CID
3415:S2CID
3207:S2CID
3113:S2CID
3009:and N
2765:(3).
2571:(1).
2547:S2CID
2378:S2CID
2285:S2CID
2246:S2CID
2081:S2CID
2045:(PDF)
2011:(PDF)
1954:Water
1765:, or
1711:, HPO
1674:humic
1615:into
1596:Sinks
1482:lytic
1239:), CO
1040:DOM:
958:DOCR
916:DOCL
838:that
818:, or
743:soils
739:algae
607:C4MIP
555:Other
199:(PIC)
193:(POC)
187:(DIC)
181:(DOC)
175:(TIC)
169:(TOC)
4950:PMID
4912:ISBN
4884:ISSN
4837:PMID
4787:PMID
4779:ISSN
4737:PMID
4672:PMID
4580:ISBN
4458:PMID
4326:PMID
3939:PMID
3585:PMID
3407:PMID
3269:PMID
3151:ISBN
2637:PMID
2539:PMID
2476:ISBN
2417:ISBN
2368:ISBN
2312:ISBN
2073:ISSN
1935:2018
1688:The
1684:CDOM
1608:and
1543:and
1468:and
1395:and
1235:(HCO
1180:and
1116:and
1108:and
992:Soil
863:HTCO
830:The
816:bogs
712:and
163:(TC)
87:Soil
4942:doi
4930:328
4876:doi
4864:161
4829:doi
4771:doi
4767:405
4727:PMC
4719:doi
4662:doi
4650:348
4621:doi
4572:doi
4502:hdl
4492:doi
4448:PMC
4440:doi
4395:doi
4383:118
4353:doi
4316:PMC
4306:doi
4294:111
4259:doi
4224:doi
3929:PMC
3921:doi
3704:doi
3629:doi
3577:doi
3565:437
3531:hdl
3521:doi
3481:doi
3399:doi
3387:292
3259:PMC
3251:doi
3197:hdl
3189:doi
3143:doi
3103:hdl
3095:doi
2843:doi
2805:doi
2801:122
2767:doi
2629:doi
2573:doi
2531:doi
2501:doi
2360:doi
2277:doi
2273:103
2267:".
2238:doi
2226:352
2204:doi
2169:doi
2134:doi
2065:doi
2023:doi
1990:doi
1986:122
1962:doi
1904:doi
1826:or
1824:NMR
1631:by
1619:or
1367:or
1231:),
745:or
737:or
677:DOC
4967::
4948:.
4940:.
4928:.
4882:.
4874:.
4862:.
4858:.
4835:.
4825:16
4823:.
4819:.
4807:^
4793:.
4785:.
4777:.
4765:.
4761:.
4749:^
4735:.
4725:.
4717:.
4707:81
4705:.
4701:.
4678:.
4670:.
4660:.
4648:.
4644:.
4619:.
4609:12
4607:.
4603:.
4578:.
4500:.
4488:22
4486:.
4482:.
4470:^
4456:.
4446:.
4438:.
4428:72
4426:.
4422:.
4393:.
4381:.
4377:.
4349:56
4347:.
4324:.
4314:.
4304:.
4292:.
4288:.
4265:.
4257:.
4245:.
4222:.
4210:.
4206:.
3961:^
3937:.
3927:.
3919:.
3907:.
3903:.
3891:^
3858:^
3844:^
3813:^
3710:.
3700:15
3698:,
3677:^
3635:.
3623:,
3605:^
3591:.
3583:.
3575:.
3563:.
3529:.
3517:79
3515:.
3511:.
3487:.
3477:14
3475:,
3413:.
3405:.
3397:.
3385:.
3373:^
3332:^
3267:.
3257:.
3249:.
3237:.
3233:.
3219:^
3205:.
3195:.
3187:.
3177:44
3175:.
3149:.
3125:^
3111:.
3101:.
3091:22
3089:.
3059:^
3018:^
2936:^
2914:^
2864:^
2849:.
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