Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins
Abstract Krill are vital as food for many marine animals but also impacted by global warming. To learn how they and other zooplankton may adapt to a warmer world we studied local adaptation in the widespread Northern krill (Meganyctiphanes norvegica). We assemble and characterize its large genome an...
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Online Access: | https://doi.org/10.1038/s41467-024-50239-7 https://doaj.org/article/a2c1aab5f1694e8dbc3e1d67591d55a4 |
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ftdoajarticles:oai:doaj.org/article:a2c1aab5f1694e8dbc3e1d67591d55a4 2024-09-15T18:18:24+00:00 Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins Per Unneberg Mårten Larsson Anna Olsson Ola Wallerman Anna Petri Ignas Bunikis Olga Vinnere Pettersson Chiara Papetti Astthor Gislason Henrik Glenner Joan E. Cartes Leocadio Blanco-Bercial Elena Eriksen Bettina Meyer Andreas Wallberg 2024-08-01T00:00:00Z https://doi.org/10.1038/s41467-024-50239-7 https://doaj.org/article/a2c1aab5f1694e8dbc3e1d67591d55a4 EN eng Nature Portfolio https://doi.org/10.1038/s41467-024-50239-7 https://doaj.org/toc/2041-1723 doi:10.1038/s41467-024-50239-7 2041-1723 https://doaj.org/article/a2c1aab5f1694e8dbc3e1d67591d55a4 Nature Communications, Vol 15, Iss 1, Pp 1-29 (2024) Science Q article 2024 ftdoajarticles https://doi.org/10.1038/s41467-024-50239-7 2024-08-05T17:50:07Z Abstract Krill are vital as food for many marine animals but also impacted by global warming. To learn how they and other zooplankton may adapt to a warmer world we studied local adaptation in the widespread Northern krill (Meganyctiphanes norvegica). We assemble and characterize its large genome and compare genome-scale variation among 74 specimens from the colder Atlantic Ocean and warmer Mediterranean Sea. The 19 Gb genome likely evolved through proliferation of retrotransposons, now targeted for inactivation by extensive DNA methylation, and contains many duplicated genes associated with molting and vision. Analysis of 760 million SNPs indicates extensive homogenizing gene-flow among populations. Nevertheless, we detect signatures of adaptive divergence across hundreds of genes, implicated in photoreception, circadian regulation, reproduction and thermal tolerance, indicating polygenic adaptation to light and temperature. The top gene candidate for ecological adaptation was nrf-6, a lipid transporter with a Mediterranean variant that may contribute to early spring reproduction. Such variation could become increasingly important for fitness in Atlantic stocks. Our study underscores the widespread but uneven distribution of adaptive variation, necessitating characterization of genetic variation among natural zooplankton populations to understand their adaptive potential, predict risks and support ocean conservation in the face of climate change. Article in Journal/Newspaper Meganyctiphanes norvegica Northern krill Directory of Open Access Journals: DOAJ Articles Nature Communications 15 1 |
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Science Q Per Unneberg Mårten Larsson Anna Olsson Ola Wallerman Anna Petri Ignas Bunikis Olga Vinnere Pettersson Chiara Papetti Astthor Gislason Henrik Glenner Joan E. Cartes Leocadio Blanco-Bercial Elena Eriksen Bettina Meyer Andreas Wallberg Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
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Science Q |
description |
Abstract Krill are vital as food for many marine animals but also impacted by global warming. To learn how they and other zooplankton may adapt to a warmer world we studied local adaptation in the widespread Northern krill (Meganyctiphanes norvegica). We assemble and characterize its large genome and compare genome-scale variation among 74 specimens from the colder Atlantic Ocean and warmer Mediterranean Sea. The 19 Gb genome likely evolved through proliferation of retrotransposons, now targeted for inactivation by extensive DNA methylation, and contains many duplicated genes associated with molting and vision. Analysis of 760 million SNPs indicates extensive homogenizing gene-flow among populations. Nevertheless, we detect signatures of adaptive divergence across hundreds of genes, implicated in photoreception, circadian regulation, reproduction and thermal tolerance, indicating polygenic adaptation to light and temperature. The top gene candidate for ecological adaptation was nrf-6, a lipid transporter with a Mediterranean variant that may contribute to early spring reproduction. Such variation could become increasingly important for fitness in Atlantic stocks. Our study underscores the widespread but uneven distribution of adaptive variation, necessitating characterization of genetic variation among natural zooplankton populations to understand their adaptive potential, predict risks and support ocean conservation in the face of climate change. |
format |
Article in Journal/Newspaper |
author |
Per Unneberg Mårten Larsson Anna Olsson Ola Wallerman Anna Petri Ignas Bunikis Olga Vinnere Pettersson Chiara Papetti Astthor Gislason Henrik Glenner Joan E. Cartes Leocadio Blanco-Bercial Elena Eriksen Bettina Meyer Andreas Wallberg |
author_facet |
Per Unneberg Mårten Larsson Anna Olsson Ola Wallerman Anna Petri Ignas Bunikis Olga Vinnere Pettersson Chiara Papetti Astthor Gislason Henrik Glenner Joan E. Cartes Leocadio Blanco-Bercial Elena Eriksen Bettina Meyer Andreas Wallberg |
author_sort |
Per Unneberg |
title |
Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
title_short |
Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
title_full |
Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
title_fullStr |
Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
title_full_unstemmed |
Ecological genomics in the Northern krill uncovers loci for local adaptation across ocean basins |
title_sort |
ecological genomics in the northern krill uncovers loci for local adaptation across ocean basins |
publisher |
Nature Portfolio |
publishDate |
2024 |
url |
https://doi.org/10.1038/s41467-024-50239-7 https://doaj.org/article/a2c1aab5f1694e8dbc3e1d67591d55a4 |
genre |
Meganyctiphanes norvegica Northern krill |
genre_facet |
Meganyctiphanes norvegica Northern krill |
op_source |
Nature Communications, Vol 15, Iss 1, Pp 1-29 (2024) |
op_relation |
https://doi.org/10.1038/s41467-024-50239-7 https://doaj.org/toc/2041-1723 doi:10.1038/s41467-024-50239-7 2041-1723 https://doaj.org/article/a2c1aab5f1694e8dbc3e1d67591d55a4 |
op_doi |
https://doi.org/10.1038/s41467-024-50239-7 |
container_title |
Nature Communications |
container_volume |
15 |
container_issue |
1 |
_version_ |
1810456533693104128 |