Demographic history and inbreeding in two declining sea duck species inferred from whole genome sequence data
Anthropogenic impact has transitioned from threatening already rare species to causing significant declines in once numerous organisms. Long-tailed duck ( Clangula hyemalis ) and velvet scoter ( Melanitta fusca ) were once important quarry sea duck species in NW Europe, but recent declines resulted...
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2024
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ftuniaarhuspubl:oai:pure.atira.dk:publications/73ff6706-6fef-4ffb-84bb-f3a3afae98e2 2024-09-30T14:31:30+00:00 Demographic history and inbreeding in two declining sea duck species inferred from whole genome sequence data Cadiz Escobar, Maria Ignacia Tengstedt, Aja Noersgaard Buur Sørensen, Iben Hove Pedersen, Emma Skindbjerg Fox, Anthony David Hansen, Michael Møller 2024-09 https://pure.au.dk/portal/en/publications/73ff6706-6fef-4ffb-84bb-f3a3afae98e2 https://doi.org/10.1111/eva.70008 eng eng https://pure.au.dk/portal/en/publications/73ff6706-6fef-4ffb-84bb-f3a3afae98e2 info:eu-repo/semantics/openAccess Cadiz Escobar , M I , Tengstedt , A N B , Sørensen , I H , Pedersen , E S , Fox , A D & Hansen , M M 2024 , ' Demographic history and inbreeding in two declining sea duck species inferred from whole genome sequence data ' , Evolutionary Applications , vol. 17 , no. 9 , e70008 . https://doi.org/10.1111/eva.70008 article 2024 ftuniaarhuspubl https://doi.org/10.1111/eva.70008 2024-09-12T00:14:26Z Anthropogenic impact has transitioned from threatening already rare species to causing significant declines in once numerous organisms. Long-tailed duck ( Clangula hyemalis ) and velvet scoter ( Melanitta fusca ) were once important quarry sea duck species in NW Europe, but recent declines resulted in their reclassification as vulnerable on the IUCN Red List. We sequenced and assembled genomes for both species and resequenced 15 individuals of each. Using analyses based on site frequency spectra and sequential Markovian coalescence, we found C. hyemalis to show more historical demographic stability, whereas M. fusca was affected particularly by the Last (Weichselian) Glaciation. This likely reflects C. hyemalis breeding continuously across the Arctic, with cycles of glaciation primarily shifting breeding areas south or north without major population declines, whereas the more restricted southern range of M. fusca would lead to significant range contraction during glaciations. Both species showed evidence of declines over the past thousands of years, potentially reflecting anthropogenic pressures with the recent decline indicating an accelerated process. Analysis of runs of homozygosity (ROH) showed low but nontrivial inbreeding, with FROH from 0.012 to 0.063 in C. hyemalis and ranging from 0 to 0.047 in M. fusca . Lengths of ROH suggested that this was due to ongoing background inbreeding rather than recent declines. Overall, despite demographically important declines, this has not yet led to strong inbreeding and genetic erosion, and the most pressing conservation concern may be the risk of density-dependent (Allee) effects. We recommend monitoring of inbreeding using ROH analysis as a cost-efficient method to track future developments to support effective conservation of these species. Article in Journal/Newspaper Arctic Melanitta fusca velvet scoter Aarhus University: Research Arctic Evolutionary Applications 17 9 |
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Open Polar |
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Aarhus University: Research |
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ftuniaarhuspubl |
language |
English |
description |
Anthropogenic impact has transitioned from threatening already rare species to causing significant declines in once numerous organisms. Long-tailed duck ( Clangula hyemalis ) and velvet scoter ( Melanitta fusca ) were once important quarry sea duck species in NW Europe, but recent declines resulted in their reclassification as vulnerable on the IUCN Red List. We sequenced and assembled genomes for both species and resequenced 15 individuals of each. Using analyses based on site frequency spectra and sequential Markovian coalescence, we found C. hyemalis to show more historical demographic stability, whereas M. fusca was affected particularly by the Last (Weichselian) Glaciation. This likely reflects C. hyemalis breeding continuously across the Arctic, with cycles of glaciation primarily shifting breeding areas south or north without major population declines, whereas the more restricted southern range of M. fusca would lead to significant range contraction during glaciations. Both species showed evidence of declines over the past thousands of years, potentially reflecting anthropogenic pressures with the recent decline indicating an accelerated process. Analysis of runs of homozygosity (ROH) showed low but nontrivial inbreeding, with FROH from 0.012 to 0.063 in C. hyemalis and ranging from 0 to 0.047 in M. fusca . Lengths of ROH suggested that this was due to ongoing background inbreeding rather than recent declines. Overall, despite demographically important declines, this has not yet led to strong inbreeding and genetic erosion, and the most pressing conservation concern may be the risk of density-dependent (Allee) effects. We recommend monitoring of inbreeding using ROH analysis as a cost-efficient method to track future developments to support effective conservation of these species. |
format |
Article in Journal/Newspaper |
author |
Cadiz Escobar, Maria Ignacia Tengstedt, Aja Noersgaard Buur Sørensen, Iben Hove Pedersen, Emma Skindbjerg Fox, Anthony David Hansen, Michael Møller |
spellingShingle |
Cadiz Escobar, Maria Ignacia Tengstedt, Aja Noersgaard Buur Sørensen, Iben Hove Pedersen, Emma Skindbjerg Fox, Anthony David Hansen, Michael Møller Demographic history and inbreeding in two declining sea duck species inferred from whole genome sequence data |
author_facet |
Cadiz Escobar, Maria Ignacia Tengstedt, Aja Noersgaard Buur Sørensen, Iben Hove Pedersen, Emma Skindbjerg Fox, Anthony David Hansen, Michael Møller |
author_sort |
Cadiz Escobar, Maria Ignacia |
title |
Demographic history and inbreeding in two declining sea duck species inferred from whole genome sequence data |
title_short |
Demographic history and inbreeding in two declining sea duck species inferred from whole genome sequence data |
title_full |
Demographic history and inbreeding in two declining sea duck species inferred from whole genome sequence data |
title_fullStr |
Demographic history and inbreeding in two declining sea duck species inferred from whole genome sequence data |
title_full_unstemmed |
Demographic history and inbreeding in two declining sea duck species inferred from whole genome sequence data |
title_sort |
demographic history and inbreeding in two declining sea duck species inferred from whole genome sequence data |
publishDate |
2024 |
url |
https://pure.au.dk/portal/en/publications/73ff6706-6fef-4ffb-84bb-f3a3afae98e2 https://doi.org/10.1111/eva.70008 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Melanitta fusca velvet scoter |
genre_facet |
Arctic Melanitta fusca velvet scoter |
op_source |
Cadiz Escobar , M I , Tengstedt , A N B , Sørensen , I H , Pedersen , E S , Fox , A D & Hansen , M M 2024 , ' Demographic history and inbreeding in two declining sea duck species inferred from whole genome sequence data ' , Evolutionary Applications , vol. 17 , no. 9 , e70008 . https://doi.org/10.1111/eva.70008 |
op_relation |
https://pure.au.dk/portal/en/publications/73ff6706-6fef-4ffb-84bb-f3a3afae98e2 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1111/eva.70008 |
container_title |
Evolutionary Applications |
container_volume |
17 |
container_issue |
9 |
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1811636022028533760 |