Connectivity in the cold: the comparative population genetics of vent-endemic fauna in the Scotia Sea, Southern Ocean
We report the first comparative population genetics study for vent fauna in the Southern Ocean using cytochrome C oxidase I and microsatellite markers. Three species are examined: the kiwaid squat lobster, Kiwa tyleri, the peltospirid gastropod, Gigantopelta chessoia, and a lepetodrilid limpet, Lepe...
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Language: | English |
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2016
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ftsouthampton:oai:eprints.soton.ac.uk:391998 2023-07-30T04:06:41+02:00 Connectivity in the cold: the comparative population genetics of vent-endemic fauna in the Scotia Sea, Southern Ocean Roterman, C.N. Copley, J.T. Linse, K.T. Tyler, P.A. Rogers, A.D. 2016-03 https://eprints.soton.ac.uk/391998/ English eng Roterman, C.N., Copley, J.T., Linse, K.T., Tyler, P.A. and Rogers, A.D. (2016) Connectivity in the cold: the comparative population genetics of vent-endemic fauna in the Scotia Sea, Southern Ocean. Molecular Ecology, 25 (5), 1073-1088. (doi:10.1111/mec.13541 <http://dx.doi.org/10.1111/mec.13541>). Article PeerReviewed 2016 ftsouthampton https://doi.org/10.1111/mec.13541 2023-07-09T22:06:11Z We report the first comparative population genetics study for vent fauna in the Southern Ocean using cytochrome C oxidase I and microsatellite markers. Three species are examined: the kiwaid squat lobster, Kiwa tyleri, the peltospirid gastropod, Gigantopelta chessoia, and a lepetodrilid limpet, Lepetodrilus sp., collected from vent fields 440 km apart on the East Scotia Ridge (ESR) and from the Kemp Caldera on the South Sandwich Island Arc, ~95 km eastwards. We report no differentiation for all species across the ESR, consistent with panmixia or recent range expansions. A lack of differentiation is notable for Kiwa tyleri, which exhibits extremely abbreviated lecithotrophic larval development, suggestive of a very limited dispersal range. Larval lifespans may, however, be extended by low temperature-induced metabolic rate reduction in the Southern Ocean, muting the impact of dispersal strategy on patterns of population structure. COI diversity patterns suggest all species experienced demographic bottlenecks or selective sweeps in the past million years and possibly at different times. ESR and Kemp limpets are divergent, although with evidence of very recent ESR-Kemp immigration. Their divergence, possibility indicative of incipient speciation, along with the absence of the other two species at Kemp, may be the consequence of differing dispersal capabilities across a ~1000 m depth range and/or different selective regimes between the two areas. Estimates of historic and recent limpet gene flow between the ESR and Kemp are consistent with predominantly easterly currents and potentially therefore, cross-axis currents on the ESR, with biogeographic implications for the region. Article in Journal/Newspaper Scotia Sea Southern Ocean University of Southampton: e-Prints Soton Southern Ocean Scotia Sea East Scotia Ridge ENVELOPE(-29.250,-29.250,-57.917,-57.917) Molecular Ecology 25 5 1073 1088 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
We report the first comparative population genetics study for vent fauna in the Southern Ocean using cytochrome C oxidase I and microsatellite markers. Three species are examined: the kiwaid squat lobster, Kiwa tyleri, the peltospirid gastropod, Gigantopelta chessoia, and a lepetodrilid limpet, Lepetodrilus sp., collected from vent fields 440 km apart on the East Scotia Ridge (ESR) and from the Kemp Caldera on the South Sandwich Island Arc, ~95 km eastwards. We report no differentiation for all species across the ESR, consistent with panmixia or recent range expansions. A lack of differentiation is notable for Kiwa tyleri, which exhibits extremely abbreviated lecithotrophic larval development, suggestive of a very limited dispersal range. Larval lifespans may, however, be extended by low temperature-induced metabolic rate reduction in the Southern Ocean, muting the impact of dispersal strategy on patterns of population structure. COI diversity patterns suggest all species experienced demographic bottlenecks or selective sweeps in the past million years and possibly at different times. ESR and Kemp limpets are divergent, although with evidence of very recent ESR-Kemp immigration. Their divergence, possibility indicative of incipient speciation, along with the absence of the other two species at Kemp, may be the consequence of differing dispersal capabilities across a ~1000 m depth range and/or different selective regimes between the two areas. Estimates of historic and recent limpet gene flow between the ESR and Kemp are consistent with predominantly easterly currents and potentially therefore, cross-axis currents on the ESR, with biogeographic implications for the region. |
format |
Article in Journal/Newspaper |
author |
Roterman, C.N. Copley, J.T. Linse, K.T. Tyler, P.A. Rogers, A.D. |
spellingShingle |
Roterman, C.N. Copley, J.T. Linse, K.T. Tyler, P.A. Rogers, A.D. Connectivity in the cold: the comparative population genetics of vent-endemic fauna in the Scotia Sea, Southern Ocean |
author_facet |
Roterman, C.N. Copley, J.T. Linse, K.T. Tyler, P.A. Rogers, A.D. |
author_sort |
Roterman, C.N. |
title |
Connectivity in the cold: the comparative population genetics of vent-endemic fauna in the Scotia Sea, Southern Ocean |
title_short |
Connectivity in the cold: the comparative population genetics of vent-endemic fauna in the Scotia Sea, Southern Ocean |
title_full |
Connectivity in the cold: the comparative population genetics of vent-endemic fauna in the Scotia Sea, Southern Ocean |
title_fullStr |
Connectivity in the cold: the comparative population genetics of vent-endemic fauna in the Scotia Sea, Southern Ocean |
title_full_unstemmed |
Connectivity in the cold: the comparative population genetics of vent-endemic fauna in the Scotia Sea, Southern Ocean |
title_sort |
connectivity in the cold: the comparative population genetics of vent-endemic fauna in the scotia sea, southern ocean |
publishDate |
2016 |
url |
https://eprints.soton.ac.uk/391998/ |
long_lat |
ENVELOPE(-29.250,-29.250,-57.917,-57.917) |
geographic |
Southern Ocean Scotia Sea East Scotia Ridge |
geographic_facet |
Southern Ocean Scotia Sea East Scotia Ridge |
genre |
Scotia Sea Southern Ocean |
genre_facet |
Scotia Sea Southern Ocean |
op_relation |
Roterman, C.N., Copley, J.T., Linse, K.T., Tyler, P.A. and Rogers, A.D. (2016) Connectivity in the cold: the comparative population genetics of vent-endemic fauna in the Scotia Sea, Southern Ocean. Molecular Ecology, 25 (5), 1073-1088. (doi:10.1111/mec.13541 <http://dx.doi.org/10.1111/mec.13541>). |
op_doi |
https://doi.org/10.1111/mec.13541 |
container_title |
Molecular Ecology |
container_volume |
25 |
container_issue |
5 |
container_start_page |
1073 |
op_container_end_page |
1088 |
_version_ |
1772819536718856192 |