Genetic diversity of the NE Atlantic sea urchin Strongylocentrotus droebachiensis unveils chaotic genetic patchiness possibly linked to local selective pressure
We compared the genetic differentiation in the green sea urchin Strongylocentrotus droebachiensis from discrete populations on the NE Atlantic coast. By using eight recently developed microsatellite markers, genetic structure was compared between populations from the Danish Strait in the south to th...
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ftunivbergen:oai:bora.uib.no:1956/19341 2023-05-15T15:39:05+02:00 Genetic diversity of the NE Atlantic sea urchin Strongylocentrotus droebachiensis unveils chaotic genetic patchiness possibly linked to local selective pressure Norderhaug, Kjell Magnus Angles d'Auriac, M. B. Fagerli, Camilla With Gundersen, Hege Christie, Hartvig C. Dahl, K. Hobæk, Anders 2018-09-11T10:45:24Z application/pdf http://hdl.handle.net/1956/19341 https://doi.org/10.1007/s00227-015-2801-y eng eng Springer urn:issn:1432-1793 urn:issn:0025-3162 http://hdl.handle.net/1956/19341 https://doi.org/10.1007/s00227-015-2801-y cristin:1366588 Attribution CC BY http://creativecommons.org/licenses/by/4.0 Copyright 2016 The Authors Marine Biology Effective Population Size Kelp Forest Pelagic Larva Norwegian Coast Planktonic Larval Stage Peer reviewed Journal article 2018 ftunivbergen https://doi.org/10.1007/s00227-015-2801-y 2023-03-14T17:44:12Z We compared the genetic differentiation in the green sea urchin Strongylocentrotus droebachiensis from discrete populations on the NE Atlantic coast. By using eight recently developed microsatellite markers, genetic structure was compared between populations from the Danish Strait in the south to the Barents Sea in the north (56–79°N). Urchins are spread by pelagic larvae and may be transported long distances by northwards-going ocean currents. Two main superimposed patterns were identified. The first showed a subtle but significant genetic differentiation from the southernmost to the northernmost of the studied populations and could be explained by an isolation by distance model. The second pattern included two coastal populations in mid-Norway (65°N), NH and NS, as well as the northernmost population of continental Norway (71°N) FV. They showed a high degree of differentiation from all other populations. The explanation to the second pattern is most likely chaotic genetic patchiness caused by introgression from another species, S. pallidus, into S. droebachiensis resulting from selective pressure. Ongoing sea urchin collapse and kelp forests recovery are observed in the area of NH, NS and FV populations. High gene flow between populations spanning more than 22° in latitude suggests a high risk of new grazing events to occur rapidly in the future if conditions for sea urchins are favourable. On the other hand, the possibility of hybridization in association with collapsing populations may be used as an early warning indicator for monitoring purposes. publishedVersion Article in Journal/Newspaper Barents Sea University of Bergen: Bergen Open Research Archive (BORA-UiB) Barents Sea Danish Strait ENVELOPE(-101.756,-101.756,78.035,78.035) Norway Marine Biology 163 2 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Effective Population Size Kelp Forest Pelagic Larva Norwegian Coast Planktonic Larval Stage |
spellingShingle |
Effective Population Size Kelp Forest Pelagic Larva Norwegian Coast Planktonic Larval Stage Norderhaug, Kjell Magnus Angles d'Auriac, M. B. Fagerli, Camilla With Gundersen, Hege Christie, Hartvig C. Dahl, K. Hobæk, Anders Genetic diversity of the NE Atlantic sea urchin Strongylocentrotus droebachiensis unveils chaotic genetic patchiness possibly linked to local selective pressure |
topic_facet |
Effective Population Size Kelp Forest Pelagic Larva Norwegian Coast Planktonic Larval Stage |
description |
We compared the genetic differentiation in the green sea urchin Strongylocentrotus droebachiensis from discrete populations on the NE Atlantic coast. By using eight recently developed microsatellite markers, genetic structure was compared between populations from the Danish Strait in the south to the Barents Sea in the north (56–79°N). Urchins are spread by pelagic larvae and may be transported long distances by northwards-going ocean currents. Two main superimposed patterns were identified. The first showed a subtle but significant genetic differentiation from the southernmost to the northernmost of the studied populations and could be explained by an isolation by distance model. The second pattern included two coastal populations in mid-Norway (65°N), NH and NS, as well as the northernmost population of continental Norway (71°N) FV. They showed a high degree of differentiation from all other populations. The explanation to the second pattern is most likely chaotic genetic patchiness caused by introgression from another species, S. pallidus, into S. droebachiensis resulting from selective pressure. Ongoing sea urchin collapse and kelp forests recovery are observed in the area of NH, NS and FV populations. High gene flow between populations spanning more than 22° in latitude suggests a high risk of new grazing events to occur rapidly in the future if conditions for sea urchins are favourable. On the other hand, the possibility of hybridization in association with collapsing populations may be used as an early warning indicator for monitoring purposes. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Norderhaug, Kjell Magnus Angles d'Auriac, M. B. Fagerli, Camilla With Gundersen, Hege Christie, Hartvig C. Dahl, K. Hobæk, Anders |
author_facet |
Norderhaug, Kjell Magnus Angles d'Auriac, M. B. Fagerli, Camilla With Gundersen, Hege Christie, Hartvig C. Dahl, K. Hobæk, Anders |
author_sort |
Norderhaug, Kjell Magnus |
title |
Genetic diversity of the NE Atlantic sea urchin Strongylocentrotus droebachiensis unveils chaotic genetic patchiness possibly linked to local selective pressure |
title_short |
Genetic diversity of the NE Atlantic sea urchin Strongylocentrotus droebachiensis unveils chaotic genetic patchiness possibly linked to local selective pressure |
title_full |
Genetic diversity of the NE Atlantic sea urchin Strongylocentrotus droebachiensis unveils chaotic genetic patchiness possibly linked to local selective pressure |
title_fullStr |
Genetic diversity of the NE Atlantic sea urchin Strongylocentrotus droebachiensis unveils chaotic genetic patchiness possibly linked to local selective pressure |
title_full_unstemmed |
Genetic diversity of the NE Atlantic sea urchin Strongylocentrotus droebachiensis unveils chaotic genetic patchiness possibly linked to local selective pressure |
title_sort |
genetic diversity of the ne atlantic sea urchin strongylocentrotus droebachiensis unveils chaotic genetic patchiness possibly linked to local selective pressure |
publisher |
Springer |
publishDate |
2018 |
url |
http://hdl.handle.net/1956/19341 https://doi.org/10.1007/s00227-015-2801-y |
long_lat |
ENVELOPE(-101.756,-101.756,78.035,78.035) |
geographic |
Barents Sea Danish Strait Norway |
geographic_facet |
Barents Sea Danish Strait Norway |
genre |
Barents Sea |
genre_facet |
Barents Sea |
op_source |
Marine Biology |
op_relation |
urn:issn:1432-1793 urn:issn:0025-3162 http://hdl.handle.net/1956/19341 https://doi.org/10.1007/s00227-015-2801-y cristin:1366588 |
op_rights |
Attribution CC BY http://creativecommons.org/licenses/by/4.0 Copyright 2016 The Authors |
op_doi |
https://doi.org/10.1007/s00227-015-2801-y |
container_title |
Marine Biology |
container_volume |
163 |
container_issue |
2 |
_version_ |
1766370511451848704 |