Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide-scale barcoding approach
Aim: The Antarctic marine environment hosts diversified and highly endemic benthos owing to its unique geologic and climatic history. Current warming trends have increased the urgency of understanding Antarctic species history to predict how environmental changes will impact ecosystem functioning. A...
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ftzenodo:oai:zenodo.org:6687607 2024-09-15T17:40:10+00:00 Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide-scale barcoding approach Cowart, Dominique Schiaparelli, Stefano Alvaro, Maria Chiara Cecchetto, Matteo Le Port, Anne-Sophie Jollivet, Didier Hourdez, Stéphane 2022-06-22 https://doi.org/10.5061/dryad.p2ngf1vt0 unknown Zenodo https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.p2ngf1vt0 oai:zenodo.org:6687607 info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode Antarctic biogeography benthic invertebrate DNA barcoding Gene flow Polynoidae Southern Ocean species connectivity info:eu-repo/semantics/other 2022 ftzenodo https://doi.org/10.5061/dryad.p2ngf1vt0 2024-07-26T02:58:25Z Aim: The Antarctic marine environment hosts diversified and highly endemic benthos owing to its unique geologic and climatic history. Current warming trends have increased the urgency of understanding Antarctic species history to predict how environmental changes will impact ecosystem functioning. Antarctic benthic lineages have traditionally been examined under three hypotheses: 1) high endemism and local radiation, 2) emergence of deep-sea taxa through thermohaline circulation, 3) species migrations across the Polar Front. In this study, we investigated which hypotheses best describe benthic invertebrate origins by examining Antarctic scale worms. Location: Southern Ocean, Kerguelen archipelago, South American peninsula, Indian Ocean, New Zealand. Taxon: Scale worm polychaetes (Polynoidae). Methods: We amassed 670 polynoids from the Southern Ocean and neighbouring areas and performed phylogenetic reconstructions to identify lineages across geographic regions, aided by mitochondrial markers Cytochrome c oxidase subunit I (Cox1) and 16S ribosomal RNA (16S). Additionally, we produced haplotype networks at the species scale to examine genetic diversity, biogeographic separations, and past demography. Results: The Cox1 dataset provided the most illuminating insights into the evolution of polynoids. Eunoe sp. was present at South America and Kerguelen, in favour of the latter acting as a migration crossroads. Harmothoe fuligineum, widespread around the Antarctic continent, was also present but isolated at Kerguelen, possibly resulting from historical freeze-thaw cycles. The genus Polyeunoa appears to have diversified prior to colonizing the continent, leading to the cooccurrence of at least three cryptic species around the Southern and Indian Oceans. Analyses identified that nearly all populations are presently expanding following a bottleneck event, possibly caused by habitat reduction from the last glacial episodes. Main Conclusions: This study details the largest phylogenetic dataset assembled to date for ... Other/Unknown Material Antarc* Antarctic Southern Ocean Zenodo |
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Zenodo |
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ftzenodo |
language |
unknown |
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Antarctic biogeography benthic invertebrate DNA barcoding Gene flow Polynoidae Southern Ocean species connectivity |
spellingShingle |
Antarctic biogeography benthic invertebrate DNA barcoding Gene flow Polynoidae Southern Ocean species connectivity Cowart, Dominique Schiaparelli, Stefano Alvaro, Maria Chiara Cecchetto, Matteo Le Port, Anne-Sophie Jollivet, Didier Hourdez, Stéphane Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide-scale barcoding approach |
topic_facet |
Antarctic biogeography benthic invertebrate DNA barcoding Gene flow Polynoidae Southern Ocean species connectivity |
description |
Aim: The Antarctic marine environment hosts diversified and highly endemic benthos owing to its unique geologic and climatic history. Current warming trends have increased the urgency of understanding Antarctic species history to predict how environmental changes will impact ecosystem functioning. Antarctic benthic lineages have traditionally been examined under three hypotheses: 1) high endemism and local radiation, 2) emergence of deep-sea taxa through thermohaline circulation, 3) species migrations across the Polar Front. In this study, we investigated which hypotheses best describe benthic invertebrate origins by examining Antarctic scale worms. Location: Southern Ocean, Kerguelen archipelago, South American peninsula, Indian Ocean, New Zealand. Taxon: Scale worm polychaetes (Polynoidae). Methods: We amassed 670 polynoids from the Southern Ocean and neighbouring areas and performed phylogenetic reconstructions to identify lineages across geographic regions, aided by mitochondrial markers Cytochrome c oxidase subunit I (Cox1) and 16S ribosomal RNA (16S). Additionally, we produced haplotype networks at the species scale to examine genetic diversity, biogeographic separations, and past demography. Results: The Cox1 dataset provided the most illuminating insights into the evolution of polynoids. Eunoe sp. was present at South America and Kerguelen, in favour of the latter acting as a migration crossroads. Harmothoe fuligineum, widespread around the Antarctic continent, was also present but isolated at Kerguelen, possibly resulting from historical freeze-thaw cycles. The genus Polyeunoa appears to have diversified prior to colonizing the continent, leading to the cooccurrence of at least three cryptic species around the Southern and Indian Oceans. Analyses identified that nearly all populations are presently expanding following a bottleneck event, possibly caused by habitat reduction from the last glacial episodes. Main Conclusions: This study details the largest phylogenetic dataset assembled to date for ... |
format |
Other/Unknown Material |
author |
Cowart, Dominique Schiaparelli, Stefano Alvaro, Maria Chiara Cecchetto, Matteo Le Port, Anne-Sophie Jollivet, Didier Hourdez, Stéphane |
author_facet |
Cowart, Dominique Schiaparelli, Stefano Alvaro, Maria Chiara Cecchetto, Matteo Le Port, Anne-Sophie Jollivet, Didier Hourdez, Stéphane |
author_sort |
Cowart, Dominique |
title |
Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide-scale barcoding approach |
title_short |
Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide-scale barcoding approach |
title_full |
Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide-scale barcoding approach |
title_fullStr |
Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide-scale barcoding approach |
title_full_unstemmed |
Origin, diversity, and biogeography of Antarctic scale worms (Polychaeta: Polynoidae): a wide-scale barcoding approach |
title_sort |
origin, diversity, and biogeography of antarctic scale worms (polychaeta: polynoidae): a wide-scale barcoding approach |
publisher |
Zenodo |
publishDate |
2022 |
url |
https://doi.org/10.5061/dryad.p2ngf1vt0 |
genre |
Antarc* Antarctic Southern Ocean |
genre_facet |
Antarc* Antarctic Southern Ocean |
op_relation |
https://zenodo.org/communities/dryad https://doi.org/10.5061/dryad.p2ngf1vt0 oai:zenodo.org:6687607 |
op_rights |
info:eu-repo/semantics/openAccess Creative Commons Zero v1.0 Universal https://creativecommons.org/publicdomain/zero/1.0/legalcode |
op_doi |
https://doi.org/10.5061/dryad.p2ngf1vt0 |
_version_ |
1810485290110812160 |