Evidence of strong small‐scale population structure in the Antarctic freshwater copepod Boeckella poppei in lakes on Signy Island, South Orkney Islands
Abstract Environmental conditions were particularly severe during the Last Glacial Maximum, altering the distribution of the Southern Hemisphere biota, particularly at higher latitudes. The copepod Boeckella poppei is the only macroscopic continental invertebrate species known to be distributed toda...
Published in: | Limnology and Oceanography |
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Online Access: | http://dx.doi.org/10.1002/lno.11435 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11435 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11435 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11435 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11435 |
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crwiley:10.1002/lno.11435 2024-06-02T07:58:20+00:00 Evidence of strong small‐scale population structure in the Antarctic freshwater copepod Boeckella poppei in lakes on Signy Island, South Orkney Islands Maturana, Claudia S. Segovia, Nicolás I. González‐Wevar, Claudio A. Díaz, Angie Rosenfeld, Sebastián Poulin, Elie Jackson, Jennifer A. Convey, Peter British Antarctic Survey Comisión Nacional de Investigación Científica y Tecnológica 2020 http://dx.doi.org/10.1002/lno.11435 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11435 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11435 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11435 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11435 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Limnology and Oceanography volume 65, issue 9, page 2024-2040 ISSN 0024-3590 1939-5590 journal-article 2020 crwiley https://doi.org/10.1002/lno.11435 2024-05-03T10:43:11Z Abstract Environmental conditions were particularly severe during the Last Glacial Maximum, altering the distribution of the Southern Hemisphere biota, particularly at higher latitudes. The copepod Boeckella poppei is the only macroscopic continental invertebrate species known to be distributed today across the three main biogeographic regions in Antarctica as well as in southern South America. Signy Island (South Orkney Islands) is a unique location for the study of Antarctic freshwater ecosystems due to its location and geographic isolation; it contains 17 lakes in several low altitude catchments. We conducted phylogeographic and demographic analyses using the cox 1 gene on 84 individuals of B. poppei from seven lakes across Signy Island. We recorded low levels of genetic diversity and a strong genetic differentiation signal between the eastern and western valleys within the island. Phylogeographic structure and demographic inference analyses suggested at least one asymmetrical dispersal event from west to east. Demographic inference detected a strong signal of population growth during the deglaciation process, which may have followed either (1) a strong genetic bottleneck due to a reduction in population size during the last glacial period, or (2) a founder effect associated with postglacial recolonization of Signy Island from elsewhere. The genetic architecture of this island's populations of B. poppei shows that historical events, rather than continuous dispersal events, likely played a major role in the species' current distribution. Finally, our study considers possible mechanisms for dispersal and colonization success of the most dominant species in the Antarctic freshwater community. Article in Journal/Newspaper Antarc* Antarctic Antarctica Signy Island South Orkney Islands Wiley Online Library Antarctic Boeckella ENVELOPE(-56.999,-56.999,-63.404,-63.404) Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) The Antarctic Limnology and Oceanography 65 9 2024 2040 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Environmental conditions were particularly severe during the Last Glacial Maximum, altering the distribution of the Southern Hemisphere biota, particularly at higher latitudes. The copepod Boeckella poppei is the only macroscopic continental invertebrate species known to be distributed today across the three main biogeographic regions in Antarctica as well as in southern South America. Signy Island (South Orkney Islands) is a unique location for the study of Antarctic freshwater ecosystems due to its location and geographic isolation; it contains 17 lakes in several low altitude catchments. We conducted phylogeographic and demographic analyses using the cox 1 gene on 84 individuals of B. poppei from seven lakes across Signy Island. We recorded low levels of genetic diversity and a strong genetic differentiation signal between the eastern and western valleys within the island. Phylogeographic structure and demographic inference analyses suggested at least one asymmetrical dispersal event from west to east. Demographic inference detected a strong signal of population growth during the deglaciation process, which may have followed either (1) a strong genetic bottleneck due to a reduction in population size during the last glacial period, or (2) a founder effect associated with postglacial recolonization of Signy Island from elsewhere. The genetic architecture of this island's populations of B. poppei shows that historical events, rather than continuous dispersal events, likely played a major role in the species' current distribution. Finally, our study considers possible mechanisms for dispersal and colonization success of the most dominant species in the Antarctic freshwater community. |
author2 |
British Antarctic Survey Comisión Nacional de Investigación Científica y Tecnológica |
format |
Article in Journal/Newspaper |
author |
Maturana, Claudia S. Segovia, Nicolás I. González‐Wevar, Claudio A. Díaz, Angie Rosenfeld, Sebastián Poulin, Elie Jackson, Jennifer A. Convey, Peter |
spellingShingle |
Maturana, Claudia S. Segovia, Nicolás I. González‐Wevar, Claudio A. Díaz, Angie Rosenfeld, Sebastián Poulin, Elie Jackson, Jennifer A. Convey, Peter Evidence of strong small‐scale population structure in the Antarctic freshwater copepod Boeckella poppei in lakes on Signy Island, South Orkney Islands |
author_facet |
Maturana, Claudia S. Segovia, Nicolás I. González‐Wevar, Claudio A. Díaz, Angie Rosenfeld, Sebastián Poulin, Elie Jackson, Jennifer A. Convey, Peter |
author_sort |
Maturana, Claudia S. |
title |
Evidence of strong small‐scale population structure in the Antarctic freshwater copepod Boeckella poppei in lakes on Signy Island, South Orkney Islands |
title_short |
Evidence of strong small‐scale population structure in the Antarctic freshwater copepod Boeckella poppei in lakes on Signy Island, South Orkney Islands |
title_full |
Evidence of strong small‐scale population structure in the Antarctic freshwater copepod Boeckella poppei in lakes on Signy Island, South Orkney Islands |
title_fullStr |
Evidence of strong small‐scale population structure in the Antarctic freshwater copepod Boeckella poppei in lakes on Signy Island, South Orkney Islands |
title_full_unstemmed |
Evidence of strong small‐scale population structure in the Antarctic freshwater copepod Boeckella poppei in lakes on Signy Island, South Orkney Islands |
title_sort |
evidence of strong small‐scale population structure in the antarctic freshwater copepod boeckella poppei in lakes on signy island, south orkney islands |
publisher |
Wiley |
publishDate |
2020 |
url |
http://dx.doi.org/10.1002/lno.11435 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Flno.11435 https://onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11435 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/lno.11435 https://aslopubs.onlinelibrary.wiley.com/doi/pdf/10.1002/lno.11435 |
long_lat |
ENVELOPE(-56.999,-56.999,-63.404,-63.404) ENVELOPE(-45.595,-45.595,-60.708,-60.708) ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic Boeckella Signy Island South Orkney Islands The Antarctic |
geographic_facet |
Antarctic Boeckella Signy Island South Orkney Islands The Antarctic |
genre |
Antarc* Antarctic Antarctica Signy Island South Orkney Islands |
genre_facet |
Antarc* Antarctic Antarctica Signy Island South Orkney Islands |
op_source |
Limnology and Oceanography volume 65, issue 9, page 2024-2040 ISSN 0024-3590 1939-5590 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/lno.11435 |
container_title |
Limnology and Oceanography |
container_volume |
65 |
container_issue |
9 |
container_start_page |
2024 |
op_container_end_page |
2040 |
_version_ |
1800741647050342400 |