Phylogeography and molecular diversity of two highly abundant Themisto amphipod species in a rapidly changing Arctic Ocean
Abstract Rapid warming in the Arctic is drastically impacting marine ecosystems, affecting species communities and food‐web structure. Pelagic Themisto amphipods are a major component of the Arctic zooplankton community and represent a key link between secondary producers and marine vertebrates at h...
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crwiley:10.1002/ece3.10359 2024-06-02T08:00:54+00:00 Phylogeography and molecular diversity of two highly abundant Themisto amphipod species in a rapidly changing Arctic Ocean Murray, Ayla Præbel, Kim Desiderato, Andrea Auel, Holger Havermans, Charlotte Deutsche Forschungsgemeinschaft 2023 http://dx.doi.org/10.1002/ece3.10359 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.10359 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 13, issue 8 ISSN 2045-7758 2045-7758 journal-article 2023 crwiley https://doi.org/10.1002/ece3.10359 2024-05-03T11:59:01Z Abstract Rapid warming in the Arctic is drastically impacting marine ecosystems, affecting species communities and food‐web structure. Pelagic Themisto amphipods are a major component of the Arctic zooplankton community and represent a key link between secondary producers and marine vertebrates at higher trophic levels. Two co‐existing species dominate in the region: the larger Themisto libellula , considered a true polar species and the smaller Themisto abyssorum , a sub‐Arctic, boreal‐Atlantic species. Recent changes in abundance and distribution ranges have been detected in both species, likely due to the Atlantification of the Arctic. The ecology and genetic structure of these species are understudied, despite their high biomass and importance in the food web. For both species, we assessed genetic diversity, patterns of spatial genetic structure and demographic history using samples from the Greenland shelf, Fram Strait and Svalbard. This was achieved by analysing variation on the mitochondrial cytochrome c oxidase subunit 1 gene (mtCOI). The results revealed contrasting levels of mtCOI diversity: low levels in T. libellula and high levels in T. abyssorum . A lack of spatial genetic structure and a high degree of genetic connectivity were detected in both species in the study region. These patterns of diversity are potentially linked to the impacts of the Last Glacial Maximum. T. libellula populations may have been isolated in glacial refugia, undergoing gene flow restriction and vicariant effects, followed by a population expansion after deglaciation. Whereas T. abyssorum likely maintained a stable, widely distributed metapopulation further south, explaining the high diversity and connectivity. This study provides new data on the phylogeography of two ecologically important species, which can contribute to predicting how zooplankton communities and food‐web structure will manifest in the rapidly changing Arctic. Article in Journal/Newspaper Arctic Arctic Ocean Fram Strait Greenland Svalbard Themisto abyssorum Themisto Themisto libellula Zooplankton Wiley Online Library Arctic Arctic Ocean Svalbard Greenland Ecology and Evolution 13 8 |
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Open Polar |
collection |
Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Rapid warming in the Arctic is drastically impacting marine ecosystems, affecting species communities and food‐web structure. Pelagic Themisto amphipods are a major component of the Arctic zooplankton community and represent a key link between secondary producers and marine vertebrates at higher trophic levels. Two co‐existing species dominate in the region: the larger Themisto libellula , considered a true polar species and the smaller Themisto abyssorum , a sub‐Arctic, boreal‐Atlantic species. Recent changes in abundance and distribution ranges have been detected in both species, likely due to the Atlantification of the Arctic. The ecology and genetic structure of these species are understudied, despite their high biomass and importance in the food web. For both species, we assessed genetic diversity, patterns of spatial genetic structure and demographic history using samples from the Greenland shelf, Fram Strait and Svalbard. This was achieved by analysing variation on the mitochondrial cytochrome c oxidase subunit 1 gene (mtCOI). The results revealed contrasting levels of mtCOI diversity: low levels in T. libellula and high levels in T. abyssorum . A lack of spatial genetic structure and a high degree of genetic connectivity were detected in both species in the study region. These patterns of diversity are potentially linked to the impacts of the Last Glacial Maximum. T. libellula populations may have been isolated in glacial refugia, undergoing gene flow restriction and vicariant effects, followed by a population expansion after deglaciation. Whereas T. abyssorum likely maintained a stable, widely distributed metapopulation further south, explaining the high diversity and connectivity. This study provides new data on the phylogeography of two ecologically important species, which can contribute to predicting how zooplankton communities and food‐web structure will manifest in the rapidly changing Arctic. |
author2 |
Deutsche Forschungsgemeinschaft |
format |
Article in Journal/Newspaper |
author |
Murray, Ayla Præbel, Kim Desiderato, Andrea Auel, Holger Havermans, Charlotte |
spellingShingle |
Murray, Ayla Præbel, Kim Desiderato, Andrea Auel, Holger Havermans, Charlotte Phylogeography and molecular diversity of two highly abundant Themisto amphipod species in a rapidly changing Arctic Ocean |
author_facet |
Murray, Ayla Præbel, Kim Desiderato, Andrea Auel, Holger Havermans, Charlotte |
author_sort |
Murray, Ayla |
title |
Phylogeography and molecular diversity of two highly abundant Themisto amphipod species in a rapidly changing Arctic Ocean |
title_short |
Phylogeography and molecular diversity of two highly abundant Themisto amphipod species in a rapidly changing Arctic Ocean |
title_full |
Phylogeography and molecular diversity of two highly abundant Themisto amphipod species in a rapidly changing Arctic Ocean |
title_fullStr |
Phylogeography and molecular diversity of two highly abundant Themisto amphipod species in a rapidly changing Arctic Ocean |
title_full_unstemmed |
Phylogeography and molecular diversity of two highly abundant Themisto amphipod species in a rapidly changing Arctic Ocean |
title_sort |
phylogeography and molecular diversity of two highly abundant themisto amphipod species in a rapidly changing arctic ocean |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1002/ece3.10359 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.10359 |
geographic |
Arctic Arctic Ocean Svalbard Greenland |
geographic_facet |
Arctic Arctic Ocean Svalbard Greenland |
genre |
Arctic Arctic Ocean Fram Strait Greenland Svalbard Themisto abyssorum Themisto Themisto libellula Zooplankton |
genre_facet |
Arctic Arctic Ocean Fram Strait Greenland Svalbard Themisto abyssorum Themisto Themisto libellula Zooplankton |
op_source |
Ecology and Evolution volume 13, issue 8 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.10359 |
container_title |
Ecology and Evolution |
container_volume |
13 |
container_issue |
8 |
_version_ |
1800745114706903040 |