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Glacial refugium

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A nunatak is a type of glacial refugium that is located on the snow-free, exposed peaks of mountains, which lie above the ice sheet during glaciations. The identification of ‘diversity hotspots’ in areas, which should have been migration regions during major glacial episodes, is evidence for nunatak
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Lowland glacial refugia, unlike nunatak and peripheral glacial refugia, are found at low elevations rather than in mountains. Situated beyond the limits of ice shields, lowland refugia have been identified for a number of plant and animal species. In Europe, for example, researchers using allozyme
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Traditionally, the identification of glacial refugia has occurred through palaeoecological analysis, which examines fossil organisms and their remains to determine the origins of modern taxa. For example, paleoecological approaches have been used to reconstruct the distributions of pollen in
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of modern-day species, especially in birds, doubt has been cast on the validity of such inferences, as much of the differentiation between populations observed today may have occurred before or after their restriction to refugia. In contrast, isolated geographic locales that host one or more
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This type of refugium is created by an influx of hydrothermal waters which maintains a humid and warm microclimate that allowed thermophilous trees like oak (Quercus), linden (Tilia), and common ash (Fraxinus excelsior) to survive the last ice age in Central Europe.
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Petit, RĂ©my J.; Aguinagalde, Itziar; Beaulieu, Jacques-Louis de; Bittkau, Christiane; Brewer, Simon; Cheddadi, Rachid; Ennos, Richard; Fineschi, Silvia; Grivet, Delphine (2003-06-06). "Glacial Refugia: Hotspots But Not Melting Pots of Genetic Diversity".
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Europe for the 13,000 years since the last glaciation. Researchers in this case ultimately established the spread of forest trees from the mountainous southern fringe of Europe, which suggests that this area served as a glacial refugium during this time.
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Schönswetter, P.; Tribsch, A.; Barfuss, M.; Niklfeld, H. (December 2002). "Several Pleistocene refugia detected in the high alpine plant Phyteuma globulariifolium Sternb. & Hoppe (Campanulaceae) in the European Alps".
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Like nunataks, peripheral glacial refugia exist within mountain systems; they differ in that they are located at the borders of mountain systems. Evidence for peripheral refugia can be found along the borders of the
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Schmitt, Thomas; Hewitt, Godfrey M. (2004-05-07). "Molecular biogeography of the arctic-alpine disjunct burnet moth species Zygaena exulans (Zygaenidae, Lepidoptera) in the Pyrenees and Alps".
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Colinvaux, P. A.; De Oliveira, P. E.; Bush, M. B. (2000-01-01). "Amazonian and neotropical plant communities on glacial time-scales: The failure of the aridity and refuge hypotheses".
51:, peripheral, and lowland. Glacial refugia have been suggested as a major cause of floral and faunal distribution patterns in both temperate and tropical latitudes. With respect to 327:
Holderegger, R., Thiel-Egenter, C. (2009): A discussion of different types of glacial refugia used in mountain biogeography and phytogeography. Journal of Biogeography 36, 476-480.
267: 263:"Holocene succession patterns of land snails across temperate Europe: East to west variation related to glacial refugia, climate and human impact" 141: 261:
HorsĂĄk, Michal; Limondin-Lozouet, Nicole; JuƙičkovĂĄ, Lucie; Granai, SalomĂ©; HoráčkovĂĄ, Jitka; Legentil, Claude; LoĆŸek, Vojen (15 June 2019).
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Delcourt, Hazel R; Delcourt, Paul A (October 1975). "The Blufflands: Pleistocene Pathways into the Tunica Hills".
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Klicka, John; Zink, Robert M. (1997-09-12). "The Importance of Recent Ice Ages in Speciation: A Failed Paradigm".
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and allowed for post-glacial re-colonization. Different types of glacial refugia can be distinguished, namely
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Nunataks and peripheral refugia for alpine plants during quaternary glaciation in the middle part of the Alps
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of plants that commonly appear only hundreds of miles to the north. Major rivers draining southward from the
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Munaut, AndrĂ©-V. (May 1986). "An Atlas of past and present pollen maps of Europe: 0–13,000 years ago".
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are all floristically rich proposed nunatak regions, which are indicative nunatak glacial survival.
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PROVAN, J; BENNETT, K (2008-10-01). "Phylogeographic insights into cryptic glacial refugia".
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In eastern North America, lowland glacial refugia along the Atlantic and Gulf Coasts host
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plants — some of which are rare, even endangered, and others entail the most southerly
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in between the foothills of the Pyrenees and the Alps during the last ice age.
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analysis have been able to confirm the continuous distribution of
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Bermingham, E.; Rohwer, S.; Freeman, S.; Wood, C. (1992-07-15).
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Four distinct types of glacial refugium have been identified:
35:) is a geographic region which made possible the survival of 68:) are generally uncontested as bona fide glacial refugia. 445:"Neotropical biodiversity: timing and potential drivers" 144:(AFLP) technique, researchers have inferred survival of 492:"Inferring the Origins of Lowland Neotropical Birds" 268:Palaeogeography, Palaeoclimatology, Palaeoecology 545:Proceedings of the National Academy of Sciences 8: 148:in peripheral refugia in the European Alps. 674: 672: 310:http://www.eoearth.org/view/article/155685/ 189:tree species. These range from the extinct 774: 582: 564: 507: 749:Hosek, Jan; et al. (31 May 2024). 253: 142:amplified fragment length polymorphism 788: 786: 716:Review of Palaeobotany and Palynology 217:system. (See illustration at right.) 7: 395: 393: 323: 321: 319: 317: 185:are associated with a gradation of 103:glacial refugia. For example, the 25: 490:Brumfield, Robb T. (2012-07-01). 449:Trends in Ecology & Evolution 402:Trends in Ecology & Evolution 882:10.1111/j.1365-2699.2004.01079.x 831:10.1046/j.1365-294x.2002.01651.x 205:, to the critically endangered 1: 793:Stehlik, Ivana (2000-06-01). 663:10.1016/S0277-3791(99)00059-1 620:10.1126/science.277.5332.1666 237:Refugium (population biology) 213:at the downstream end of the 728:10.1016/0034-6667(86)90044-8 443:Rull, ValentĂ­ (2011-10-01). 281:10.1016/j.palaeo.2019.03.028 232:Last Glacial Maximum refugia 681:American Midland Naturalist 308:The encyclopedia of earth, 242:Glacial survival hypothesis 979: 643:Quaternary Science Reviews 509:10.1525/auk.2012.129.3.367 461:10.1016/j.tree.2011.05.011 414:10.1016/j.tree.2008.06.010 197:, to extinct-in-the-wild 146:Phyteuma globulariifolium 870:Journal of Biogeography 566:10.1073/pnas.89.14.6624 360:10.1126/science.1083264 193:near the outlet of the 767:10.1126/sciadv.ado6611 160: 183:Appalachian Mountains 159: 107:mountain ranges, the 60:species (regarded as 58:critically endangered 179:disjunct populations 130:Carpathian Mountains 53:disjunct populations 655:2000QSRv...19..141C 614:(5332): 1666–1669. 557:1992PNAS...89.6624B 352:2003Sci...300.1563P 346:(5625): 1563–1565. 215:Chattahoochee River 191:Critchfield spruce 161: 921:Torreya Guardians 915:Torreya taxifolia 825:(12): 2637–2647. 819:Molecular Ecology 551:(14): 6624–6628. 195:Mississippi River 16:(Redirected from 970: 932: 931: 929: 927: 911:Barlow, Connie. 908: 902: 901: 865: 859: 858: 813: 807: 806: 790: 781: 780: 778: 755:Science Advances 746: 740: 739: 722:(3–4): 411–412. 711: 705: 704: 676: 667: 666: 649:(1–5): 141–169. 638: 632: 631: 603: 597: 596: 586: 568: 536: 530: 529: 511: 487: 481: 480: 440: 434: 433: 397: 388: 387: 334: 328: 325: 312: 306: 300: 299: 297: 295: 258: 89:Hot spring oases 29:glacial refugium 21: 978: 977: 973: 972: 971: 969: 968: 967: 938: 937: 936: 935: 925: 923: 910: 909: 905: 867: 866: 862: 815: 814: 810: 792: 791: 784: 748: 747: 743: 713: 712: 708: 693:10.2307/2424434 678: 677: 670: 640: 639: 635: 605: 604: 600: 538: 537: 533: 489: 488: 484: 455:(10): 508–513. 442: 441: 437: 408:(10): 564–571. 399: 398: 391: 336: 335: 331: 326: 315: 307: 303: 293: 291: 260: 259: 255: 250: 223: 207:Florida torreya 167:Zygaena exulans 154: 125: 100: 91: 83: 74: 66:glacial relicts 33:glacial refugia 23: 22: 18:Glacial refugia 15: 12: 11: 5: 976: 974: 966: 965: 960: 955: 950: 940: 939: 934: 933: 903: 876:(6): 885–893. 860: 808: 797:. 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Index

Glacial refugia
flora
fauna
ice ages
nunatak
disjunct populations
critically endangered
paleoendemics
glacial relicts
Monte Rosa
Avers
Engadine
Bernina
Carpathian Mountains
Pyrenees
European Alps
amplified fragment length polymorphism

Zygaena exulans
endemic
disjunct populations
Appalachian Mountains
paleoendemic
Critchfield spruce
Mississippi River
Altamaha River
Florida torreya
Florida yew
Chattahoochee River
Drought refuge

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