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 copepodBoeckella poppeiis the only macroscopic continental invertebrate species known to be distributed today across th...
Published in: | Limnology and Oceanography |
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Online Access: | https://doi.org/10.1002/lno.11435 http://repositorio.uchile.cl/handle/2250/177802 |
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ftunivchile:oai:repositorio.uchile.cl:2250/177802 2023-05-15T13:38:36+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 González Wevar, Claudio Díaz, Angie Rosenfeld, Sebastián Poulin, Elie Jackson, Jennifer A. Convey, Peter 2020 https://doi.org/10.1002/lno.11435 http://repositorio.uchile.cl/handle/2250/177802 en eng Wiley Limnol. Oceanogr. 65, 2020, 2024–2040 doi:10.1002/lno.11435 http://repositorio.uchile.cl/handle/2250/177802 Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ CC-BY-NC-ND Limnology and Oceanography Long-distance dispersal Terrestrial life East Antarctica Glacial refugia Larsemann hills Victoria land Resting eggs Colonization Biogeography Evolution Artículo de revista 2020 ftunivchile https://doi.org/10.1002/lno.11435 2021-09-25T23:52:05Z Environmental conditions were particularly severe during the Last Glacial Maximum, altering the distribution of the Southern Hemisphere biota, particularly at higher latitudes. The copepodBoeckella poppeiis 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 thecox1 gene on 84 individuals ofB. poppeifrom 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 ofB. poppeishows 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 East Antarctica Signy Island South Orkney Islands Victoria Land Universidad de Chile: Repositorio académico Antarctic Boeckella ENVELOPE(-56.999,-56.999,-63.404,-63.404) East Antarctica Larsemann Hills ENVELOPE(76.217,76.217,-69.400,-69.400) 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 Victoria Land Limnology and Oceanography 65 9 2024 2040 |
institution |
Open Polar |
collection |
Universidad de Chile: Repositorio académico |
op_collection_id |
ftunivchile |
language |
English |
topic |
Long-distance dispersal Terrestrial life East Antarctica Glacial refugia Larsemann hills Victoria land Resting eggs Colonization Biogeography Evolution |
spellingShingle |
Long-distance dispersal Terrestrial life East Antarctica Glacial refugia Larsemann hills Victoria land Resting eggs Colonization Biogeography Evolution Maturana, Claudia S. Segovia, Nicolás González Wevar, Claudio 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 |
topic_facet |
Long-distance dispersal Terrestrial life East Antarctica Glacial refugia Larsemann hills Victoria land Resting eggs Colonization Biogeography Evolution |
description |
Environmental conditions were particularly severe during the Last Glacial Maximum, altering the distribution of the Southern Hemisphere biota, particularly at higher latitudes. The copepodBoeckella poppeiis 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 thecox1 gene on 84 individuals ofB. poppeifrom 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 ofB. poppeishows 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 González Wevar, Claudio Díaz, Angie Rosenfeld, Sebastián Poulin, Elie Jackson, Jennifer A. Convey, Peter |
author_facet |
Maturana, Claudia S. Segovia, Nicolás González Wevar, Claudio 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 |
https://doi.org/10.1002/lno.11435 http://repositorio.uchile.cl/handle/2250/177802 |
long_lat |
ENVELOPE(-56.999,-56.999,-63.404,-63.404) ENVELOPE(76.217,76.217,-69.400,-69.400) ENVELOPE(-45.595,-45.595,-60.708,-60.708) ENVELOPE(-45.500,-45.500,-60.583,-60.583) |
geographic |
Antarctic Boeckella East Antarctica Larsemann Hills Signy Island South Orkney Islands The Antarctic Victoria Land |
geographic_facet |
Antarctic Boeckella East Antarctica Larsemann Hills Signy Island South Orkney Islands The Antarctic Victoria Land |
genre |
Antarc* Antarctic Antarctica East Antarctica Signy Island South Orkney Islands Victoria Land |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica Signy Island South Orkney Islands Victoria Land |
op_source |
Limnology and Oceanography |
op_relation |
Limnol. Oceanogr. 65, 2020, 2024–2040 doi:10.1002/lno.11435 http://repositorio.uchile.cl/handle/2250/177802 |
op_rights |
Attribution-NonCommercial-NoDerivs 3.0 Chile http://creativecommons.org/licenses/by-nc-nd/3.0/cl/ |
op_rightsnorm |
CC-BY-NC-ND |
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_ |
1766108648934735872 |