Patterns and Drivers of Tree Mortality in Iberian Forests: Climatic Effects Are Modified by Competition
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Open Access
- 25 February 2013
- journal article
- research article
- Published by Public Library of Science (PLoS) in PLOS ONE
- Vol. 8 (2), e56843
- https://doi.org/10.1371/journal.pone.0056843
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 from c. 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.Keywords
This publication has 58 references indexed in Scilit:
- Widespread crown condition decline, food web disruption, and amplified tree mortality with increased climate change-type droughtProceedings of the National Academy of Sciences of the United States of America, 2011
- Influences of Forest Structure, Climate and Species Composition on Tree Mortality across the Eastern USPLOS ONE, 2010
- A global overview of drought and heat-induced tree mortality reveals emerging climate change risks for forestsForest Ecology and Management, 2010
- Pourquoi et où les arbres adultes meurent dans une jeune forêt tempérée? Le rôle du voisinageAnnals of Forest Science, 2009
- Predicting and understanding forest dynamics using a simple tractable modelProceedings of the National Academy of Sciences of the United States of America, 2008
- SPATIAL ELEMENTS OF MORTALITY RISK IN OLD-GROWTH FORESTSEcology, 2008
- Apparent climatically induced increase of tree mortality rates in a temperate forestEcology Letters, 2007
- Intraspecific Variation in Sapling Mortality and Growth Predicts Geographic Variation in Forest CompositionEcological Monographs, 1996
- Forest Models Defined by Field Measurements: Estimation, Error Analysis and DynamicsEcological Monographs, 1996
- Tree Death as an Ecological ProcessBioScience, 1987