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Ancient DNA reveals lack of postglacial habitat tracking in the arctic fox

Dalén, Love ; Nyström, Veronica ; Valdiosera, Cristina ; Germonpré, Mietje ; Sablin, Mikhail ; Turner, Elaine ; Angerbjörn, Anders ; Arsuaga, Juan Luis ; Götherström, Anders

Proceedings of the National Academy of Sciences - PNAS, 2007-04, Vol.104 (16), p.6726-6729 [Periódico revisado por pares]

United States: National Academy of Sciences

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Título:
Ancient DNA reveals lack of postglacial habitat tracking in the arctic fox
Autor: Dalén, Love ; Nyström, Veronica ; Valdiosera, Cristina ; Germonpré, Mietje ; Sablin, Mikhail ; Turner, Elaine ; Angerbjörn, Anders ; Arsuaga, Juan Luis ; Götherström, Anders
Assuntos: Alopex lagopus ; Animal Ecology ; Animals ; Biologi ; Biological Evolution ; Biological Sciences ; Biology ; Climate change ; Deoxyribonucleic acid ; Diversity of life ; DNA ; DNA, Mitochondrial - genetics ; Ecosystem ; Evolutionary stasis ; Extinct species ; Extinction ; Fossils ; Foxes ; Foxes - genetics ; Genetic variation ; Habitats ; Haplotypes ; Livets mångfald ; Mitochondrial DNA ; Molecular Sequence Data ; Natural History ; NATURAL SCIENCES ; NATURVETENSKAP ; Phylogeography ; Population genetics ; Postglacial recolonization ; Scandinavian and Nordic Countries ; Sequence Analysis, DNA ; Species extinction ; zoologisk ekologi
É parte de: Proceedings of the National Academy of Sciences - PNAS, 2007-04, Vol.104 (16), p.6726-6729
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
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Contributed by Juan Luis Arsuaga, February 22, 2007
Author contributions: L.D. and A.G. designed research; L.D., V.N., C.V., M.G., M.S., E.T., A.A., J.L.A., and A.G. performed research; L.D. analyzed data; and L.D., A.A., J.L.A., and A.G. wrote the paper.
Descrição: How species respond to an increased availability of habitat, for example at the end of the last glaciation, has been well established. In contrast, little is known about the opposite process, when the amount of habitat decreases. The hypothesis of habitat tracking predicts that species should be able to track both increases and decreases in habitat availability. The alternative hypothesis is that populations outside refugia become extinct during periods of unsuitable climate. To test these hypotheses, we used ancient DNA techniques to examine genetic variation in the arctic fox (Alopex lagopus) through an expansion/contraction cycle. The results show that the arctic fox in midlatitude Europe became extinct at the end of the Pleistocene and did not track the habitat when it shifted to the north. Instead, a high genetic similarity between the extant populations in Scandinavia and Siberia suggests an eastern origin for the Scandinavian population at the end of the last glaciation. These results provide new insights into how species respond to climate change, since they suggest that populations are unable to track decreases in habitat avaliability. This implies that arctic species may be particularly vulnerable to increases in global temperatures.
Editor: United States: National Academy of Sciences
Idioma: Inglês

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Ancient DNA reveals lack of postglacial habitat tracking in the arctic fox

Dalén, Love ; Nyström, Veronica ; Valdiosera, Cristina ; Germonpré, Mietje ; Sablin, Mikhail ; Turner, Elaine ; Angerbjörn, Anders ; Arsuaga, Juan Luis ; Götherström, Anders

United States: National Academy of Sciences

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