English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/126851
Share/Impact:
Statistics
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:
Title

Population variation and natural selection on leaf traits in cork oak throughout its distribution range

AuthorsRamírez-Valiente, J. A.; Valladares Ros, Fernando ; Sánchez-Gómez, David; Delgado, Antonio; Aranda, Ismael
KeywordsWater use efficiency
Phenotypic selection
Adaptation
Nitrogen leaf content
Population divergence
Specific leaf area
Issue Date28-May-2014
PublisherElsevier
CitationActa Oecologica 58: 49-56 (2014)
AbstractA central issue in evolutionary biology is the exploration of functional trait variation among populations and the extent to which this variation has adaptive value. It was recently proposed that specific leaf area (SLA), leaf nitrogen concentration per mass (Nmass) and water use efficiency in cork oak play an important role in adaptation to water availability in the environment. In order to investigate this hypothesis, we explored, first, whether there was population-level variation in cork oak (Quercus suber) for these functional traits throughout its distribution range if this were the case, it would be consistent with the hypothesis that different rainfall patterns have led to ecotypic differentiation in this species. Second, we studied whether the population-level variation matched short-term selection on these traits under different water availability conditions using two fitness components: survival and growth. We found high population-level differentiation in SLA and Nmass, with populations from dry places exhibiting the lowest values for SLA and Nmass. Likewise, reduced SLA had fitness benefits in terms of growth for plants under dry conditions. However, contrary to our expectations, we did not find any pattern of association between functional traits and survival in nine-year-old saplings despite considerable drought during one year of the study period. These results together with findings from the literature suggest that early stages of development are the most critical period for this species. Most importantly, these findings suggest that cork oak saplings have a considerable potential to cope with dry conditions. This capacity to withstand aridity has important implications for conservation of cork oak woodlands under the ongoing climate change. © 2014 Elsevier Masson SAS.
URIhttp://hdl.handle.net/10261/126851
DOI10.1016/j.actao.2014.04.004
Identifiersdoi: 10.1016/j.actao.2014.04.004
issn: 1146-609X
Appears in Collections:(MNCN) Artículos
Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFThumbnail
View/Open
Show full item record
Review this work
 

Related articles:


WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.