Population structure and long-term decline in three species of heart urchins Abatus spp. near-shore in the Vestfold Hills region, East Antarctica
Patterns of fine-scale spatial population structure in Antarctic benthic species are poorly understood. There is a high proportion of brooding species in the Antarctic benthos, and a brooding life history strategy is expected to restrict their dispersal abilities and therefore foster population stru...
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ftunivtasecite:oai:ecite.utas.edu.au:107453 2023-05-15T13:42:40+02:00 Population structure and long-term decline in three species of heart urchins Abatus spp. near-shore in the Vestfold Hills region, East Antarctica Carrea, C Burridge, CP King, CK Miller, KJ 2016 application/pdf https://doi.org/10.3354/meps11573 http://ecite.utas.edu.au/107453 en eng Inter-Research http://ecite.utas.edu.au/107453/1/2016_Abatus.pdf http://dx.doi.org/10.3354/meps11573 Carrea, C and Burridge, CP and King, CK and Miller, KJ, Population structure and long-term decline in three species of heart urchins Abatus spp. near-shore in the Vestfold Hills region, East Antarctica, Marine Ecology - Progress Series, 545 pp. 227-238. ISSN 0171-8630 (2016) [Refereed Article] http://ecite.utas.edu.au/107453 Biological Sciences Genetics Genetics not elsewhere classified Refereed Article PeerReviewed 2016 ftunivtasecite https://doi.org/10.3354/meps11573 2022-08-30T09:11:43Z Patterns of fine-scale spatial population structure in Antarctic benthic species are poorly understood. There is a high proportion of brooding species in the Antarctic benthos, and a brooding life history strategy is expected to restrict their dispersal abilities and therefore foster population structure. Additionally, genetic structuring of populations can preserve signals of historic processes (such as Pleistocene glaciations) on species distributions and abundances. We developed a set of seven microsatellite markers to examine population genetic variation and infer the demographic history of three sympatric Antarctic sea urchin species from the order Spatangoida ( Abatus ingens , A. shackletoni and A. philippii ), all with brooding life history strategies. Samples were collected at five sites separated by up to 5 km, in the near-shore area surrounding Davis Station in the Vestfold Hills area of the Australian Antarctic Territory. We found evidence of a long-term population decline in all three species, and the estimated timing of the decline precedes anthropogenic activities and is compatible with long-term climate variability. Two genetic clusters in A. ingens and A. shackletoni suggest secondary contact after population differentiation in glacial refugia. Life history is not a good predictor of fine-scale population structure in these species, with gene flow possible at distances of 5 km. Finally, no evidence was found for a potential impact of pollution from Davis Station on genetic variation. The reduced effective population size observed for these Antarctic benthic species highlights their fragility and the need for conservation concern. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica eCite UTAS (University of Tasmania) Antarctic Australian Antarctic Territory Davis Station ENVELOPE(77.968,77.968,-68.576,-68.576) Davis-Station ENVELOPE(77.968,77.968,-68.576,-68.576) East Antarctica The Antarctic Vestfold Vestfold Hills Marine Ecology Progress Series 545 227 238 |
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Open Polar |
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eCite UTAS (University of Tasmania) |
op_collection_id |
ftunivtasecite |
language |
English |
topic |
Biological Sciences Genetics Genetics not elsewhere classified |
spellingShingle |
Biological Sciences Genetics Genetics not elsewhere classified Carrea, C Burridge, CP King, CK Miller, KJ Population structure and long-term decline in three species of heart urchins Abatus spp. near-shore in the Vestfold Hills region, East Antarctica |
topic_facet |
Biological Sciences Genetics Genetics not elsewhere classified |
description |
Patterns of fine-scale spatial population structure in Antarctic benthic species are poorly understood. There is a high proportion of brooding species in the Antarctic benthos, and a brooding life history strategy is expected to restrict their dispersal abilities and therefore foster population structure. Additionally, genetic structuring of populations can preserve signals of historic processes (such as Pleistocene glaciations) on species distributions and abundances. We developed a set of seven microsatellite markers to examine population genetic variation and infer the demographic history of three sympatric Antarctic sea urchin species from the order Spatangoida ( Abatus ingens , A. shackletoni and A. philippii ), all with brooding life history strategies. Samples were collected at five sites separated by up to 5 km, in the near-shore area surrounding Davis Station in the Vestfold Hills area of the Australian Antarctic Territory. We found evidence of a long-term population decline in all three species, and the estimated timing of the decline precedes anthropogenic activities and is compatible with long-term climate variability. Two genetic clusters in A. ingens and A. shackletoni suggest secondary contact after population differentiation in glacial refugia. Life history is not a good predictor of fine-scale population structure in these species, with gene flow possible at distances of 5 km. Finally, no evidence was found for a potential impact of pollution from Davis Station on genetic variation. The reduced effective population size observed for these Antarctic benthic species highlights their fragility and the need for conservation concern. |
format |
Article in Journal/Newspaper |
author |
Carrea, C Burridge, CP King, CK Miller, KJ |
author_facet |
Carrea, C Burridge, CP King, CK Miller, KJ |
author_sort |
Carrea, C |
title |
Population structure and long-term decline in three species of heart urchins Abatus spp. near-shore in the Vestfold Hills region, East Antarctica |
title_short |
Population structure and long-term decline in three species of heart urchins Abatus spp. near-shore in the Vestfold Hills region, East Antarctica |
title_full |
Population structure and long-term decline in three species of heart urchins Abatus spp. near-shore in the Vestfold Hills region, East Antarctica |
title_fullStr |
Population structure and long-term decline in three species of heart urchins Abatus spp. near-shore in the Vestfold Hills region, East Antarctica |
title_full_unstemmed |
Population structure and long-term decline in three species of heart urchins Abatus spp. near-shore in the Vestfold Hills region, East Antarctica |
title_sort |
population structure and long-term decline in three species of heart urchins abatus spp. near-shore in the vestfold hills region, east antarctica |
publisher |
Inter-Research |
publishDate |
2016 |
url |
https://doi.org/10.3354/meps11573 http://ecite.utas.edu.au/107453 |
long_lat |
ENVELOPE(77.968,77.968,-68.576,-68.576) ENVELOPE(77.968,77.968,-68.576,-68.576) |
geographic |
Antarctic Australian Antarctic Territory Davis Station Davis-Station East Antarctica The Antarctic Vestfold Vestfold Hills |
geographic_facet |
Antarctic Australian Antarctic Territory Davis Station Davis-Station East Antarctica The Antarctic Vestfold Vestfold Hills |
genre |
Antarc* Antarctic Antarctica East Antarctica |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica |
op_relation |
http://ecite.utas.edu.au/107453/1/2016_Abatus.pdf http://dx.doi.org/10.3354/meps11573 Carrea, C and Burridge, CP and King, CK and Miller, KJ, Population structure and long-term decline in three species of heart urchins Abatus spp. near-shore in the Vestfold Hills region, East Antarctica, Marine Ecology - Progress Series, 545 pp. 227-238. ISSN 0171-8630 (2016) [Refereed Article] http://ecite.utas.edu.au/107453 |
op_doi |
https://doi.org/10.3354/meps11573 |
container_title |
Marine Ecology Progress Series |
container_volume |
545 |
container_start_page |
227 |
op_container_end_page |
238 |
_version_ |
1766171008485556224 |