English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/47981
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

Shifts in the regeneration niche of an endangered tree (Acer opalus ssp.granatense) during ontogeny: Using an ecological concept for application

AuthorsQuero Pérez, José Luis; Gómez Aparicio, Lorena ; Zamora Rodríguez, Regino; Maestre Gil, Fdo. T.
KeywordsAcer opalus spp. granatense
Mediterranean mountain
Ontogenetic shift
Regeneration niche
Tree regeneration
Issue DateOct-2008
PublisherElsevier
CitationBasic and Applied Ecology 9(6): 635–644 (2008)
AbstractMost of our knowledge regarding ontogenetic niche shifts in plants has been derived from studies involving only two or unconnected life stages. Approaches covering a broader range of different life stages are still needed to fully understand the implications of ontogenetic niche shifts for plant regeneration dynamics. We investigated ontogenetic shifts in the endangered Mediterranean tree species Acer opalus ssp. granatense (A. opalus) comparing the environmental characteristics of individuals of different ages with those of a random sample of available microsites. In addition, since herbivory could be a limiting factor, herbivory damage was quantified. Differences in environmental characteristics between locations of individual plants and randomly selected points became larger with plant age, suggesting that the regeneration niche of A. opalus shifts during ontogeny, undergoing a contraction. The presence of shrubs and adult trees, the depth of the litter layer, and herbivory were the main factors influencing these changes. A. opalus can germinate in all available microhabitats its seeds can reach, but saplings establish and grow only in a subset of microhabitats, which represent a change in tolerance to extrinsic factors. Old saplings establish under the canopy of shrubs, far away from tree cover that could block light required in the oldest stage. Therefore, temporal changes in the nature and strength of plant–plant interactions are also occurring. The ecological concept of niche shifts reveals the microsites with higher probabilities of long-term sapling survival of A. opalus: shrub cover involves an array of environmental changes crucial for the successful establishment of A. opalus saplings under stressful Mediterranean conditions, from microhabitat amelioration to herbivory protection.
Description10 pages, 3 figures, 3 tables, 55 references.
Publisher version (URL)http://dx.doi.org/10.1016/j.baae.2007.06.012
URIhttp://hdl.handle.net/10261/47981
DOI10.1016/j.baae.2007.06.012
ISSN1439-1791
Appears in Collections:(IRNAS) Artículos
Files in This Item:
File Description SizeFormat 
Shifts in the regeneratio.pdf2,65 MBAdobe 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.