Spatial and ecological population genetic structures within two island‐endemic Aeonium species of different niche width
Identifieur interne : 000113 ( Main/Curation ); précédent : 000112; suivant : 000114Spatial and ecological population genetic structures within two island‐endemic Aeonium species of different niche width
Auteurs : David E. V. Harter ; Mike Thiv ; Alfons Weig ; Anke Jentsch ; Carl BeierkuhnleinSource :
- Ecology and Evolution [ 2045-7758 ] ; 2015.
Abstract
The Crassulacean genus
Url:
DOI: 10.1002/ece3.1682
PubMed: 26664682
PubMed Central: 4667834
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PMC:4667834Le document en format XML
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<author><name sortKey="Thiv, Mike" sort="Thiv, Mike" uniqKey="Thiv M" first="Mike" last="Thiv">Mike Thiv</name>
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<author><name sortKey="Weig, Alfons" sort="Weig, Alfons" uniqKey="Weig A" first="Alfons" last="Weig">Alfons Weig</name>
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<author><name sortKey="Jentsch, Anke" sort="Jentsch, Anke" uniqKey="Jentsch A" first="Anke" last="Jentsch">Anke Jentsch</name>
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<sourceDesc><biblStruct><analytic><title xml:lang="en" level="a" type="main">Spatial and ecological population genetic structures within two island‐endemic <italic>Aeonium</italic>
species of different niche width</title>
<author><name sortKey="Harter, David E V" sort="Harter, David E V" uniqKey="Harter D" first="David E. V." last="Harter">David E. V. Harter</name>
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<author><name sortKey="Thiv, Mike" sort="Thiv, Mike" uniqKey="Thiv M" first="Mike" last="Thiv">Mike Thiv</name>
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<author><name sortKey="Weig, Alfons" sort="Weig, Alfons" uniqKey="Weig A" first="Alfons" last="Weig">Alfons Weig</name>
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<author><name sortKey="Jentsch, Anke" sort="Jentsch, Anke" uniqKey="Jentsch A" first="Anke" last="Jentsch">Anke Jentsch</name>
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<author><name sortKey="Beierkuhnlein, Carl" sort="Beierkuhnlein, Carl" uniqKey="Beierkuhnlein C" first="Carl" last="Beierkuhnlein">Carl Beierkuhnlein</name>
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<series><title level="j">Ecology and Evolution</title>
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<front><div type="abstract" xml:lang="en"><title>Abstract</title>
<p>The Crassulacean genus <italic>Aeonium</italic>
is a well‐known example for plant species radiation on oceanic archipelagos. However, while allopatric speciation among islands is documented for this genus, the role of intra‐island speciation due to population divergence by topographical isolation or ecological heterogeneity has not yet been addressed. The aim of this study was to investigate intraspecific genetic structures and to identify spatial and ecological drivers of genetic population differentiation on the island scale. We analyzed inter simple sequence repeat variation within two island‐endemic <italic>Aeonium</italic>
species of La Palma: one widespread generalist that covers a large variety of different habitat types (<italic>Ae. davidbramwellii</italic>
) and one narrow ecological specialist (<italic>Ae. nobile</italic>
), in order to assess evolutionary potentials on this island. Gene pool differentiation and genetic diversity patterns were associated with major landscape structures in both species, with phylogeographic implications. However, overall levels of genetic differentiation were low. For the generalist species, outlier loci detection and loci–environment correlation approaches indicated moderate signatures of divergent selection pressures linked to temperature and precipitation variables, while the specialist species missed such patterns. Our data point to incipient differentiation among populations, emphasizing that ecological heterogeneity and topographical structuring within the small scales of an island can foster evolutionary processes. Very likely, such processes have contributed to the radiation of <italic>Aeonium</italic>
on the Canary Islands. There is also support for different evolutionary mechanisms between generalist and specialist species.</p>
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