Evidence of strong small-scale population structure in the Antarctic freshwater copepod Boeckella poppei in lakes on Signy Island, South Orkney Islands
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...
Published in: | Limnology and Oceanography |
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Format: | Article in Journal/Newspaper |
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Online Access: | http://nora.nerc.ac.uk/id/eprint/527359/ https://nora.nerc.ac.uk/id/eprint/527359/1/lno.11435.pdf https://aslopubs.onlinelibrary.wiley.com/doi/full/10.1002/lno.11435 |
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ftnerc:oai:nora.nerc.ac.uk:527359 2023-05-15T13:41:45+02:00 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 2020-09 text http://nora.nerc.ac.uk/id/eprint/527359/ https://nora.nerc.ac.uk/id/eprint/527359/1/lno.11435.pdf https://aslopubs.onlinelibrary.wiley.com/doi/full/10.1002/lno.11435 en eng Wiley https://nora.nerc.ac.uk/id/eprint/527359/1/lno.11435.pdf Maturana, Claudia S.; Segovia, Nicolás I.; González-Wevar, Claudio A.; Díaz, Angie; Rosenfeld, Sebastián; Poulin, Elie; Jackson, Jennifer A. orcid:0000-0003-4158-1924 Convey, Peter orcid:0000-0001-8497-9903 . 2020 Evidence of strong small-scale population structure in the Antarctic freshwater copepod Boeckella poppei in lakes on Signy Island, South Orkney Islands. Limnology and Oceanography, 65 (9). 2024-2040. https://doi.org/10.1002/lno.11435 <https://doi.org/10.1002/lno.11435> cc_by_4 CC-BY Publication - Article PeerReviewed 2020 ftnerc https://doi.org/10.1002/lno.11435 2023-02-04T19:50:27Z 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 cox1 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 Natural Environment Research Council: NERC Open Research Archive Antarctic The Antarctic South Orkney Islands ENVELOPE(-45.500,-45.500,-60.583,-60.583) Signy Island ENVELOPE(-45.595,-45.595,-60.708,-60.708) Boeckella ENVELOPE(-56.999,-56.999,-63.404,-63.404) Limnology and Oceanography 65 9 2024 2040 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
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 cox1 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. |
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://nora.nerc.ac.uk/id/eprint/527359/ https://nora.nerc.ac.uk/id/eprint/527359/1/lno.11435.pdf https://aslopubs.onlinelibrary.wiley.com/doi/full/10.1002/lno.11435 |
long_lat |
ENVELOPE(-45.500,-45.500,-60.583,-60.583) ENVELOPE(-45.595,-45.595,-60.708,-60.708) ENVELOPE(-56.999,-56.999,-63.404,-63.404) |
geographic |
Antarctic The Antarctic South Orkney Islands Signy Island Boeckella |
geographic_facet |
Antarctic The Antarctic South Orkney Islands Signy Island Boeckella |
genre |
Antarc* Antarctic Antarctica Signy Island South Orkney Islands |
genre_facet |
Antarc* Antarctic Antarctica Signy Island South Orkney Islands |
op_relation |
https://nora.nerc.ac.uk/id/eprint/527359/1/lno.11435.pdf Maturana, Claudia S.; Segovia, Nicolás I.; González-Wevar, Claudio A.; Díaz, Angie; Rosenfeld, Sebastián; Poulin, Elie; Jackson, Jennifer A. orcid:0000-0003-4158-1924 Convey, Peter orcid:0000-0001-8497-9903 . 2020 Evidence of strong small-scale population structure in the Antarctic freshwater copepod Boeckella poppei in lakes on Signy Island, South Orkney Islands. Limnology and Oceanography, 65 (9). 2024-2040. https://doi.org/10.1002/lno.11435 <https://doi.org/10.1002/lno.11435> |
op_rights |
cc_by_4 |
op_rightsnorm |
CC-BY |
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_ |
1766156790488104960 |