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Contrasting genomic consequences of anthropogenic reintroduction and natural recolonization in high-arctic wild reindeer
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Burnett, Hamish A. (author)
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Bieker, Vanessa C. (author)
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Le Moullec, Mathilde (author)
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Peeters, Bart (author)
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Rosvold, Jørgen (author)
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Ønvik Pedersen, Åshild (author)
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- Dalén, Love, 1980- (author)
- Stockholms universitet,Zoologiska institutionen,Centre for Palaeogenetics, Sweden; Swedish Museum of Natural History, Sweden
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Loe, Leif Egil (author)
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Jensen, Henrik (author)
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Hansen, Brage B. (author)
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Martin, Michael D. (author)
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(creator_code:org_t)
- 2023
- English.
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In: Evolutionary Applications. - 1752-4571. ; 16:9, s. 1531-1548
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https://doi.org/10.1...
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
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- Anthropogenic reintroduction can supplement natural recolonization in reestablishing a species' distribution and abundance. However, both reintroductions and recolonizations can give rise to founder effects that reduce genetic diversity and increase inbreeding, potentially causing the accumulation of genetic load and reduced fitness. Most current populations of the endemic high-arctic Svalbard reindeer (Rangifer tarandus platyrhynchus) originate from recent reintroductions or recolonizations following regional extirpations due to past overharvesting. We investigated and compared the genomic consequences of these two paths to reestablishment using whole-genome shotgun sequencing of 100 Svalbard reindeer across their range. We found little admixture between reintroduced and natural populations. Two reintroduced populations, each founded by 12 individuals around four decades (i.e. 8 reindeer generations) ago, formed two distinct genetic clusters. Compared to the source population, these populations showed only small decreases in genome-wide heterozygosity and increases in inbreeding and lengths of runs of homozygosity. In contrast, the two naturally recolonized populations without admixture possessed much lower heterozygosity, higher inbreeding and longer runs of homozygosity, possibly caused by serial population founder effects and/or fewer or more genetically related founders than in the reintroduction events. Naturally recolonized populations can thus be more vulnerable to the accumulation of genetic load than reintroduced populations. This suggests that in some organisms even small-scale reintroduction programs based on genetically diverse source populations can be more effective than natural recolonization in establishing genetically diverse populations. These findings warrant particular attention in the conservation and management of populations and species threatened by habitat fragmentation and loss.
Subject headings
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Genetik (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Genetics (hsv//eng)
Keyword
- conservation genetics
- inbreeding
- recolonization
- reintroduction
Publication and Content Type
- ref (subject category)
- art (subject category)
To the university's database
- By the author/editor
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Burnett, Hamish ...
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Bieker, Vanessa ...
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Le Moullec, Math ...
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Peeters, Bart
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Rosvold, Jørgen
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Ønvik Pedersen, ...
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show more...
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Dalén, Love, 198 ...
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Loe, Leif Egil
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Jensen, Henrik
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Hansen, Brage B.
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Martin, Michael ...
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show less...
- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Evolutionary Bio ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Genetics
- Articles in the publication
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Evolutionary App ...
- By the university
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Stockholm University