Direct and indirect effects of climate on demography and early growth of pinus sylvestris at the rear edge: changing roles of biotic and abiotic factors
Benavides, Raquel (Museo Nacional de Ciencias Naturales (Madrid, Espanya))
García Rabasa, Sonia (Museo Nacional de Ciencias Naturales (Madrid, Espanya))
Granda, Elena (Museo Nacional de Ciencias Naturales (Madrid, Espanya))
Escudero, Adrián (Universidad Rey Juan Carlos. Área de Biodiversidad y Conservación)
Hódar, José Antonio (Universidad de Granada. Departamento de Ecología)
Martínez Vilalta, Jordi, 1975- (Universitat Autònoma de Barcelona. Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia)
Rincón Herranz, Ana M. (Consejo Superior de Investigaciones Científicas (Espanya). Instituto de Ciencias Agrarias)
Zamora Rodríguez, Regino (Universidad Rey Juan Carlos. Área de Biodiversidad y Conservación)
Valladares, F.. (Museo Nacional de Ciencias Naturales (Madrid, Espanya))

Date:	2013
Abstract:	Global change triggers shifts in forest composition, with warming and aridification being particularly threatening for the populations located at the rear edge of the species distributions. This is the case of Scots pine (Pinus sylvestris) in the Mediterranean Basin where uncertainties in relation to its dynamics under these changing scenarios are still high. We analysed the relative effect of climate on the recruitment patterns of Scots pine and its interactions with local biotic and abiotic variables at different spatial scales. Number of seedlings and saplings was surveyed, and their annual shoot growth measured in 96 plots located across altitudinal gradients in three different regions in the Iberian Peninsula. We found a significant influence of climate on demography and performance of recruits, with a non-linear effect of temperature on the presence of juveniles, and a positive effect of precipitation on their survival. Abundance of juveniles of P. sylvestris that underwent their first summer drought was skewed towards higher altitudes than the altitudinal mean range of the conspecific adults and the optimum elevation for seedlings' emergence. At local level, light availability did not influence juveniles' density, but it enhanced their growth. Biotic interactions were found between juveniles and the herb cover (competition) and between the number of newly emerged seedlings and shrubs (facilitation). Results also highlighted the indirect effect that climate exerts over the local factors, modulating the interactions with the pre-existing vegetation that were more evident at more stressful sites. This multiscale approach improves our understanding of the dynamics of these marginal populations and some management criteria can be inferred to boost their conservation under the current global warming.
Grants:	European Commission 226299 European Commission 265171 Ministerio de Ciencia e Innovación CSD2008_00040
Rights:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, i la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Language:	Anglès
Document:	Article ; recerca ; Versió publicada
Subject:	Climate ; Demography ; Pinus sylvestris
Published in:	PloS one, Vol. 8, Issue 3 (March 2013) , p. e59824, ISSN 1932-6203

DOI: 10.1371/journal.pone.0059824
PMID: 23555794

10 p, 1.5 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > CREAF (Centre de Recerca Ecològica i d'Aplicacions Forestals)
Articles > Research articles
Articles > Published articles