Complex genetic structure revealed in the circum-Antarctic broadcast spawning sea urchin Sterechinus neumayeri
Patterns and mechanisms of gene flow and larval dispersal in the Antarctic marine environment are still poorly understood, despite the current threat of rapid climate change and the need for such information to inform conservation and management efforts. Studies on Antarctic brooding marine inverteb...
Main Authors: | , , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2018
|
Subjects: | |
Online Access: | http://hdl.handle.net/10536/DRO/DU:30113329 https://figshare.com/articles/journal_contribution/Complex_genetic_structure_revealed_in_the_circum-Antarctic_broadcast_spawning_sea_urchin_Sterechinus_neumayeri/20794810 |
id |
ftdeakinunifig:oai:figshare.com:article/20794810 |
---|---|
record_format |
openpolar |
spelling |
ftdeakinunifig:oai:figshare.com:article/20794810 2024-06-23T07:47:41+00:00 Complex genetic structure revealed in the circum-Antarctic broadcast spawning sea urchin Sterechinus neumayeri KJ Miller HP Baird J Van Oosterom Julie Mondon CK King 2018-08-09T00:00:00Z http://hdl.handle.net/10536/DRO/DU:30113329 https://figshare.com/articles/journal_contribution/Complex_genetic_structure_revealed_in_the_circum-Antarctic_broadcast_spawning_sea_urchin_Sterechinus_neumayeri/20794810 unknown http://hdl.handle.net/10536/DRO/DU:30113329 https://figshare.com/articles/journal_contribution/Complex_genetic_structure_revealed_in_the_circum-Antarctic_broadcast_spawning_sea_urchin_Sterechinus_neumayeri/20794810 All Rights Reserved Ecology not elsewhere classified Zoology not elsewhere classified Oceanography not elsewhere classified Gene flow Larval dispersal Migration Chaotic genetic patchiness Microsatellites Echinoid School of Life and Environmental Sciences Centre for Integrative Ecology 3103 Ecology 3104 Evolutionary biology Text Journal contribution 2018 ftdeakinunifig 2024-06-13T00:21:12Z Patterns and mechanisms of gene flow and larval dispersal in the Antarctic marine environment are still poorly understood, despite the current threat of rapid climate change and the need for such information to inform conservation and management efforts. Studies on Antarctic brooding marine invertebrates have demonstrated limited connectivity, concurrent with life history expectations; however, no equivalent data are available for broadcast spawning species for which we might expect a higher capacity for larval dispersal. Here, we have used microsatellite DNA markers and mitochondrial DNA sequence data to explore patterns of genetic structure and infer larval dispersal patterns across spatial scales of <500 m to 1400 km in the broadcast spawning sea urchin Sterechinus neumayeri. We show genetic differentiation at small spatial scales (<1 km), but genetic homogeneity over moderate (1−25 km) and large spatial scales (1000 km), consistent with patterns described as chaotic genetic patchiness. Self-recruitment appears common in S. neumayeri, and genotypes of larvae collected from the water column provide preliminary evidence that the adult population structure is maintained through variability among larval cohorts. Genetic similarity at large spatial scales may represent evolutionary connectivity on a circum-Antarctic scale, and likely also reflects a history of shelf recolonisation after isolation in glacial refugia. Article in Journal/Newspaper Antarc* Antarctic DRO - Deakin Research Online Antarctic The Antarctic |
institution |
Open Polar |
collection |
DRO - Deakin Research Online |
op_collection_id |
ftdeakinunifig |
language |
unknown |
topic |
Ecology not elsewhere classified Zoology not elsewhere classified Oceanography not elsewhere classified Gene flow Larval dispersal Migration Chaotic genetic patchiness Microsatellites Echinoid School of Life and Environmental Sciences Centre for Integrative Ecology 3103 Ecology 3104 Evolutionary biology |
spellingShingle |
Ecology not elsewhere classified Zoology not elsewhere classified Oceanography not elsewhere classified Gene flow Larval dispersal Migration Chaotic genetic patchiness Microsatellites Echinoid School of Life and Environmental Sciences Centre for Integrative Ecology 3103 Ecology 3104 Evolutionary biology KJ Miller HP Baird J Van Oosterom Julie Mondon CK King Complex genetic structure revealed in the circum-Antarctic broadcast spawning sea urchin Sterechinus neumayeri |
topic_facet |
Ecology not elsewhere classified Zoology not elsewhere classified Oceanography not elsewhere classified Gene flow Larval dispersal Migration Chaotic genetic patchiness Microsatellites Echinoid School of Life and Environmental Sciences Centre for Integrative Ecology 3103 Ecology 3104 Evolutionary biology |
description |
Patterns and mechanisms of gene flow and larval dispersal in the Antarctic marine environment are still poorly understood, despite the current threat of rapid climate change and the need for such information to inform conservation and management efforts. Studies on Antarctic brooding marine invertebrates have demonstrated limited connectivity, concurrent with life history expectations; however, no equivalent data are available for broadcast spawning species for which we might expect a higher capacity for larval dispersal. Here, we have used microsatellite DNA markers and mitochondrial DNA sequence data to explore patterns of genetic structure and infer larval dispersal patterns across spatial scales of <500 m to 1400 km in the broadcast spawning sea urchin Sterechinus neumayeri. We show genetic differentiation at small spatial scales (<1 km), but genetic homogeneity over moderate (1−25 km) and large spatial scales (1000 km), consistent with patterns described as chaotic genetic patchiness. Self-recruitment appears common in S. neumayeri, and genotypes of larvae collected from the water column provide preliminary evidence that the adult population structure is maintained through variability among larval cohorts. Genetic similarity at large spatial scales may represent evolutionary connectivity on a circum-Antarctic scale, and likely also reflects a history of shelf recolonisation after isolation in glacial refugia. |
format |
Article in Journal/Newspaper |
author |
KJ Miller HP Baird J Van Oosterom Julie Mondon CK King |
author_facet |
KJ Miller HP Baird J Van Oosterom Julie Mondon CK King |
author_sort |
KJ Miller |
title |
Complex genetic structure revealed in the circum-Antarctic broadcast spawning sea urchin Sterechinus neumayeri |
title_short |
Complex genetic structure revealed in the circum-Antarctic broadcast spawning sea urchin Sterechinus neumayeri |
title_full |
Complex genetic structure revealed in the circum-Antarctic broadcast spawning sea urchin Sterechinus neumayeri |
title_fullStr |
Complex genetic structure revealed in the circum-Antarctic broadcast spawning sea urchin Sterechinus neumayeri |
title_full_unstemmed |
Complex genetic structure revealed in the circum-Antarctic broadcast spawning sea urchin Sterechinus neumayeri |
title_sort |
complex genetic structure revealed in the circum-antarctic broadcast spawning sea urchin sterechinus neumayeri |
publishDate |
2018 |
url |
http://hdl.handle.net/10536/DRO/DU:30113329 https://figshare.com/articles/journal_contribution/Complex_genetic_structure_revealed_in_the_circum-Antarctic_broadcast_spawning_sea_urchin_Sterechinus_neumayeri/20794810 |
geographic |
Antarctic The Antarctic |
geographic_facet |
Antarctic The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://hdl.handle.net/10536/DRO/DU:30113329 https://figshare.com/articles/journal_contribution/Complex_genetic_structure_revealed_in_the_circum-Antarctic_broadcast_spawning_sea_urchin_Sterechinus_neumayeri/20794810 |
op_rights |
All Rights Reserved |
_version_ |
1802651840280526848 |