Linked Life Data

14691249

Source:http://linkedlifedata.com/resource/pubmed/id/14691249

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2004-1-7
pubmed:abstractText
Understanding what causes the decreasing abundance of species at the margins of their distributions along environmental gradients has drawn considerable interest, especially because of the recent need to predict shifts in species distribution patterns in response to climatic changes. Here, we address the ecological range limit problem by focusing on the sedge, Carex curvula, a dominant plant of high-elevation grasslands in Europe, for which two ecologically differentiated but crosscompatible taxa have been described in the Alps. Our study heuristically combines an extensive phytoecological survey of alpine plant communities to set the niche attributes of each taxon and a population genetic study to assess the multilocus genotypes of 177 individuals sampled in typical and marginal habitats. We found that ecological variation strongly correlates with genetic differentiation. Our data strongly suggest that ecologically marginal populations of each taxon are mainly composed of individuals with genotypes resulting from introgressive hybridization. Conversely, no hybrids were found in typical habitats, even though the two taxa were close enough to crossbreed. Thus, our results indicate that genotype integrity is maintained in optimal habitats, whereas introgressed individuals are favored in marginal habitats. We conclude that gene flow between closely related taxa might be an important, although underestimated, mechanism shaping species distribution along gradients.
pubmed:commentsCorrections
http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-10231955, http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-10447865, http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-10620412, http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-11050557, http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-11298968, http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-11344292, http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-11371642, http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-7501463, http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-7624325, http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-7816833, http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-9486646, http://linkedlifedata.com/resource/pubmed/commentcorrection/14691249-9628000
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0027-8424
pubmed:author
pubmed:issnType
Print
pubmed:day
6
pubmed:volume
101
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
171-6
pubmed:dateRevised
2010-9-20
pubmed:meshHeading
pubmed:year
2004
pubmed:articleTitle
Genetic introgression as a potential to widen a species' niche: insights from alpine Carex curvula.
pubmed:affiliation
Laboratoire d'Ecologie Alpine Unité Mixte de Recherche 5553 UJF-Centre National de la Recherche Scientifique and Station Alpine du Lautaret, University Joseph Fourier, BP 53-38041 Grenoble Cedex 9, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't