The phylogeographic architecture of the fucoid seaweed Ascophyllum nodosum: an intertidal ‘marine tree’ and survivor of more than one glacial–interglacial cycle
Abstract Aim Ascophyllum nodosum (L.) Le Jolis is a dominant fucoid seaweed occurring along sheltered, rocky shores throughout the North Atlantic (but not in the Pacific), where it is a foundational species of the intertidal community. Its large size and vulnerability to ice‐scour have led to the hy...
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crwiley:10.1111/j.1365-2699.2009.02262.x 2024-09-15T18:21:36+00:00 The phylogeographic architecture of the fucoid seaweed Ascophyllum nodosum: an intertidal ‘marine tree’ and survivor of more than one glacial–interglacial cycle Olsen, Jeanine L. Zechman, Frederick W. Hoarau, Galice Coyer, James A. Stam, Wytze T. Valero, Myriam Åberg, Per 2010 http://dx.doi.org/10.1111/j.1365-2699.2009.02262.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2699.2009.02262.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2699.2009.02262.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Biogeography volume 37, issue 5, page 842-856 ISSN 0305-0270 1365-2699 journal-article 2010 crwiley https://doi.org/10.1111/j.1365-2699.2009.02262.x 2024-08-06T04:12:13Z Abstract Aim Ascophyllum nodosum (L.) Le Jolis is a dominant fucoid seaweed occurring along sheltered, rocky shores throughout the North Atlantic (but not in the Pacific), where it is a foundational species of the intertidal community. Its large size and vulnerability to ice‐scour have led to the hypothesis that contemporary populations in the north‐west Atlantic may be the result of de novo recolonization from the north‐east Atlantic since the Last Glacial Maximum (LGM) ( c. 20 ka). We tested this hypothesis. Location Temperate North Atlantic rocky intertidal between c. 42 and 65° N latitude. Methods More than 1300 individuals from 28 populations were sampled from across the entire range of A. nodosum and genotyped for six microsatellite loci, and > 500 individuals were genotyped for two mitochondrial loci, an intergenic spacer (IGS) and the tRNA (W) gene ( trn W). Population structure and historical demography were analysed in a standard population genetics and coalescence framework. Results Based on the presence of private alleles and haplotypes, we found that A. nodosum has survived on both sides of the Atlantic (since before the LGM, dating back to at least the penultimate Eemian interglacial) with similar effective population sizes and divergence times (1.2 and 0.8 Ma). Dispersal has been predominantly from Europe to North America, and there is very weak present‐day population differentiation across the North Atlantic. Diversity measures provided additional support for determining the location of refugia. Main conclusions Ascophyllum nodosum was apparently little affected by the LGM, although contemporary climate change is likely to have major effects on its latitudinal distribution on both sides of the North Atlantic. It is a very long‐lived species, analogous in virtually all demographic aspects to a tree – resistant to extinction but vulnerable to catastrophic events. The Brittany peninsula is a hotspot of genetic diversity worthy of conservation. Article in Journal/Newspaper North Atlantic North East Atlantic North West Atlantic Wiley Online Library Journal of Biogeography 37 5 842 856 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Aim Ascophyllum nodosum (L.) Le Jolis is a dominant fucoid seaweed occurring along sheltered, rocky shores throughout the North Atlantic (but not in the Pacific), where it is a foundational species of the intertidal community. Its large size and vulnerability to ice‐scour have led to the hypothesis that contemporary populations in the north‐west Atlantic may be the result of de novo recolonization from the north‐east Atlantic since the Last Glacial Maximum (LGM) ( c. 20 ka). We tested this hypothesis. Location Temperate North Atlantic rocky intertidal between c. 42 and 65° N latitude. Methods More than 1300 individuals from 28 populations were sampled from across the entire range of A. nodosum and genotyped for six microsatellite loci, and > 500 individuals were genotyped for two mitochondrial loci, an intergenic spacer (IGS) and the tRNA (W) gene ( trn W). Population structure and historical demography were analysed in a standard population genetics and coalescence framework. Results Based on the presence of private alleles and haplotypes, we found that A. nodosum has survived on both sides of the Atlantic (since before the LGM, dating back to at least the penultimate Eemian interglacial) with similar effective population sizes and divergence times (1.2 and 0.8 Ma). Dispersal has been predominantly from Europe to North America, and there is very weak present‐day population differentiation across the North Atlantic. Diversity measures provided additional support for determining the location of refugia. Main conclusions Ascophyllum nodosum was apparently little affected by the LGM, although contemporary climate change is likely to have major effects on its latitudinal distribution on both sides of the North Atlantic. It is a very long‐lived species, analogous in virtually all demographic aspects to a tree – resistant to extinction but vulnerable to catastrophic events. The Brittany peninsula is a hotspot of genetic diversity worthy of conservation. |
format |
Article in Journal/Newspaper |
author |
Olsen, Jeanine L. Zechman, Frederick W. Hoarau, Galice Coyer, James A. Stam, Wytze T. Valero, Myriam Åberg, Per |
spellingShingle |
Olsen, Jeanine L. Zechman, Frederick W. Hoarau, Galice Coyer, James A. Stam, Wytze T. Valero, Myriam Åberg, Per The phylogeographic architecture of the fucoid seaweed Ascophyllum nodosum: an intertidal ‘marine tree’ and survivor of more than one glacial–interglacial cycle |
author_facet |
Olsen, Jeanine L. Zechman, Frederick W. Hoarau, Galice Coyer, James A. Stam, Wytze T. Valero, Myriam Åberg, Per |
author_sort |
Olsen, Jeanine L. |
title |
The phylogeographic architecture of the fucoid seaweed Ascophyllum nodosum: an intertidal ‘marine tree’ and survivor of more than one glacial–interglacial cycle |
title_short |
The phylogeographic architecture of the fucoid seaweed Ascophyllum nodosum: an intertidal ‘marine tree’ and survivor of more than one glacial–interglacial cycle |
title_full |
The phylogeographic architecture of the fucoid seaweed Ascophyllum nodosum: an intertidal ‘marine tree’ and survivor of more than one glacial–interglacial cycle |
title_fullStr |
The phylogeographic architecture of the fucoid seaweed Ascophyllum nodosum: an intertidal ‘marine tree’ and survivor of more than one glacial–interglacial cycle |
title_full_unstemmed |
The phylogeographic architecture of the fucoid seaweed Ascophyllum nodosum: an intertidal ‘marine tree’ and survivor of more than one glacial–interglacial cycle |
title_sort |
phylogeographic architecture of the fucoid seaweed ascophyllum nodosum: an intertidal ‘marine tree’ and survivor of more than one glacial–interglacial cycle |
publisher |
Wiley |
publishDate |
2010 |
url |
http://dx.doi.org/10.1111/j.1365-2699.2009.02262.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1365-2699.2009.02262.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2699.2009.02262.x |
genre |
North Atlantic North East Atlantic North West Atlantic |
genre_facet |
North Atlantic North East Atlantic North West Atlantic |
op_source |
Journal of Biogeography volume 37, issue 5, page 842-856 ISSN 0305-0270 1365-2699 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1365-2699.2009.02262.x |
container_title |
Journal of Biogeography |
container_volume |
37 |
container_issue |
5 |
container_start_page |
842 |
op_container_end_page |
856 |
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1810460256368590848 |