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Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Patterns and drivers of tree Mortality in Iberian Forests: climatic effects are modified by competition
Authors: Ruiz-Benito, Paloma
Lines, Emily R
Gomez-Aparicio, Lorena
Zavala, Miguel A
Coomes, David A
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Issue Date: Feb-2013
Publisher: Public Library of Science
Citation: Ruiz-Benito P, Lines ER, Gomez-Aparicio L, Zavala MA & Coomes DA (2013) Patterns and drivers of tree Mortality in Iberian Forests: climatic effects are modified by competition, PLoS ONE, 8 (2), Art. No.: e56843.
Abstract: Tree mortality is a key process underlying forest dynamics and community assembly. Understanding how tree mortality is driven by simultaneous drivers is needed to evaluate potential effects of climate change on forest composition. Using repeat-measure information fromc.400,000 trees from the Spanish Forest Inventory, we quantified the relative importance of tree size, competition, climate and edaphic conditions on tree mortality of 11 species, and explored the combined effect of climate and competition. Tree mortality was affected by all of these multiple drivers, especially tree size and asymmetric competition, and strong interactions between climate and competition were found. All species showed L-shaped mortality patterns (i.e. showed decreasing mortality with tree size), but pines were more sensitive to asymmetric competition than broadleaved species. Among climatic variables, the negative effect of temperature on tree mortality was much larger than the effect of precipitation. Moreover, the effect of climate (mean annual temperature and annual precipitation) on tree mortality was aggravated at high competition levels for all species, but especially for broadleaved species. The significant interaction between climate and competition on tree mortality indicated that global change in Mediterranean regions, causing hotter and drier conditions and denser stands, could lead to profound effects on forest structure and composition. Therefore, to evaluate the potential effects of climatic change on tree mortality, forest structure must be considered, since two systems of similar composition but different structure could radically differ in their response to climatic conditions.
Type: Journal Article
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Rights: © 2013 Ruiz-Benito et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Affiliation: Biological and Environmental Sciences
University of Cambridge
Instituto de Recursos Naturales
University of Alcala
University of Cambridge

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