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High genetic variab...
High genetic variability of vagrant polar bears illustrates importance of population connectivity in fragmented sea ice habitats
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- Kutschera, Verena E. (författare)
- Uppsala University,Uppsala universitet,Evolutionsbiologi,Senckenberg Gesell Nat Forsch, Senckenberg Biodivers & Climate Res Ctr BiK F, Frankfurt, Germany.,Senckenberg Biodiversity and Climate Research Centre
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- Frosch, C. (författare)
- Senckenberg Res Inst, Conservat Genet Grp, Gelnhausen, Germany.;Nat Hist Museum Frankfurt, Gelnhausen, Germany.,Senckenberg Research Institute and Natural History Museum Frankfurt
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- Janke, A. (författare)
- Senckenberg Gesell Nat Forsch, Senckenberg Biodivers & Climate Res Ctr BiK F, Frankfurt, Germany.;Goethe Univ Frankfurt, Inst Ecol Evolut & Divers, Frankfurt, Germany.,Goethe University,Senckenberg Biodiversity and Climate Research Centre
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visa fler...
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- Skirnisson, K. (författare)
- Inst Expt Pathol, Keldur, Iceland.;Univ Iceland, Reykjavik, Iceland.,University of Iceland
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- Bidon, T. (författare)
- Senckenberg Gesell Nat Forsch, Senckenberg Biodivers & Climate Res Ctr BiK F, Frankfurt, Germany.,Senckenberg Biodiversity and Climate Research Centre
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- Lecomte, N. (författare)
- Univ Moncton, Dept Biol, Polar & Boreal Ecol, Moncton, NB, Canada.;Govt Nunavut, Igloolik, NU, Canada.,University of Moncton
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- Fain, S. R. (författare)
- Natl Fish & Wildlife Forens Lab, Ashland, OR USA.,National Fish and Wildlife Forensic Laboratory
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- Eiken, H. G. (författare)
- Norwegian Inst Bioecon Res, NIBIO, Svanvik, Norway.,Norwegian Institute of Bioeconomy Research (Nibio)
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- Hagen, S. B. (författare)
- Norwegian Inst Bioecon Res, NIBIO, Svanvik, Norway.,Norwegian Institute of Bioeconomy Research (Nibio)
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- Arnason, U. (författare)
- Lund University,Lunds universitet,Neurokirurgi,Sektion IV,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Neurosurgery,Section IV,Department of Clinical Sciences, Lund,Faculty of Medicine
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- Laidre, K. L. (författare)
- Univ Washington, Appl Phys Lab, Polar Sci Ctr, Seattle, WA 98105 USA.,University of Washington
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- Nowak, C. (författare)
- Senckenberg Res Inst, Conservat Genet Grp, Gelnhausen, Germany.;Nat Hist Museum Frankfurt, Gelnhausen, Germany.,Senckenberg Research Institute and Natural History Museum Frankfurt
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- Hailer, F. (författare)
- Senckenberg Gesell Nat Forsch, Senckenberg Biodivers & Climate Res Ctr BiK F, Frankfurt, Germany.;Cardiff Univ, Sch Biosci, Cardiff CF10 3AX, S Glam, Wales.,Cardiff University
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(creator_code:org_t)
- 2016-01-07
- 2016
- Engelska.
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Ingår i: Animal Conservation. - : Wiley. - 1367-9430 .- 1469-1795. ; 19:4, s. 337-349
- Relaterad länk:
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https://doi.org/10.1...
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https://uu.diva-port... (primary) (Raw object)
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http://uu.diva-porta...
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http://dx.doi.org/10... (free)
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://lup.lub.lu.s...
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Abstract
Ämnesord
Stäng
- Projections by the Intergovernmental Panel on Climate Change (IPCC) and sea ice forecasts suggest that Arctic sea ice will decline markedly in coming decades. Expected effects on the entire ecosystem include a contraction of suitable polar bear habitat into one or few refugia. Such large-scale habitat decline and fragmentation could lead to reduced genetic diversity. Here we compare genetic variability of four vagrant polar bears that reached Iceland with that in recognized subpopulations from across the range, examining 23 autosomal microsatellites, mitochondrial control region sequences and Y-chromosomal markers. The vagrants' genotypes grouped with different genetic clusters and showed similar genetic variability at autosomal microsatellites (expected heterozygosity, allelic richness, and individual heterozygosity) as individuals in recognized subpopulations. Each vagrant carried a different mitochondrial haplotype. A likely route for polar bears to reach Iceland is via Fram Strait, a major gateway for the physical exportation of sea ice from the Arctic basin. Vagrant polar bears on Iceland likely originated from more than one recognized subpopulation, and may have been caught in sea ice export during long-distance movements to the East Greenland area. Although their potentially diverse geographic origins might suggest that these vagrants encompass much higher genetic variability than vagrants or dispersers in other regions, the four Icelandic vagrants encompassed similar genetic variability as any four randomly picked individuals from a single subpopulation or from the entire sample. We suggest that this is a consequence of the low overall genetic variability and weak range-wide genetic structuring of polar bears - few dispersers can represent a large portion of the species' gene pool. As predicted by theory and our demographic simulations, continued gene flow will be necessary to counteract loss of genetic variability in increasingly fragmented Arctic habitats. Similar considerations will be important in the management of other taxa that utilize sea ice habitats.
Ämnesord
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Genetik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Genetics (hsv//eng)
Nyckelord
- climate change
- dispersal
- genetic variability
- habitat fragmentation
- inbreeding
- Arctic sea ice
- Ursus maritimus
- polar bear
- Arctic sea ice
- climate change
- dispersal
- genetic variability
- habitat fragmentation
- inbreeding
- polar bear
- Ursus maritimus
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Kutschera, Veren ...
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Frosch, C.
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Janke, A.
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Skirnisson, K.
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Bidon, T.
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Lecomte, N.
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visa fler...
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Fain, S. R.
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Eiken, H. G.
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Hagen, S. B.
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Arnason, U.
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Laidre, K. L.
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Nowak, C.
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Hailer, F.
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