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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Thompson, John Gouyon, Pierre-henri Roset, Stephanie Bouguet, Guillaume Charpentier, Anne Charmasson, Faustine Buatois, Bruno Vernet, Philippe |
| Spatial Coverage | Mediterranean Sea |
| Description | Author Affiliation: Thompson J ( Unité Mixte de Recherche 5175, Centre National de la Recherche Scientifique, 34293 Montpellier Cedex 5, France. john.thompson@cefe.cnrs.fr); |
| Abstract | Many species show changes in distribution and phenotypic trait variation in response to climatic warming. Evidence of genetically based trait responses to climate change is, however, less common. Here, we detected evolutionary variation in the landscape-scale distribution of a genetically based chemical polymorphism in Mediterranean wild thyme (Thymus vulgaris) in association with modified extreme winter freezing events. By comparing current data on morph distribution with that observed in the early 1970s, we detected a significant increase in the proportion of morphs that are sensitive to winter freezing. This increase in frequency was observed in 17 of the 24 populations in which, since the 1970s, annual extreme winter freezing temperatures have risen above the thresholds that cause mortality of freezing-sensitive morphs. Our results provide an original example of rapid ongoing evolutionary change associated with relaxed selection (less extreme freezing events) on a local landscape scale. In species whose distribution and genetic variability are shaped by strong selection gradients, there may be little time lag associated with their ecological and evolutionary response to long-term environmental change. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 8 |
| Volume Number | 110 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2013-02-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Climate Change Evolution, Molecular Polymorphism, Genetic Mediterranean Sea Thymus Plant Genetics Research Support, Non-U.S. Gov't Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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