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Disentangling Biodiversity and Climatic Determinants of Wood Production

Abstract : Background: Despite empirical support for an increase in ecosystem productivity with species diversity in synthetic systems, there is ample evidence that this relationship is dependent on environmental characteristics, especially in structurally more complex natural systems. Empirical support for this relationship in forests is urgently needed, as these ecosystems play an important role in carbon sequestration. Methodology/Principal Findings: We tested whether tree wood production is positively related to tree species richness while controlling for climatic factors, by analyzing 55265 forest inventory plots in 11 forest types across five European countries. On average, wood production was 24% higher in mixed than in monospecific forests. Taken alone, wood production was enhanced with increasing tree species richness in almost all forest types. In some forests, wood production was also greater with increasing numbers of tree types. Structural Equation Modeling indicated that the increase in wood production with tree species richness was largely mediated by a positive association between stand basal area and tree species richness. Mean annual temperature and mean annual precipitation affected wood production and species richness directly. However, the direction and magnitude of the influence of climatic variables on wood production and species richness was not consistent, and vary dependent on forest type. Conclusions: Our analysis is the first to find a local scale positive relationship between tree species richness and tree wood production occurring across a continent. Our results strongly support incorporating the role of biodiversity in management and policy plans for forest carbon sequestration.
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Submitted on : Tuesday, July 16, 2013 - 11:24:25 AM
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Montserrat Vilà, Amparo Carrillo-Gavilán, Jordi Vayreda, Harald Bugmann, Jonas Fridman, et al.. Disentangling Biodiversity and Climatic Determinants of Wood Production. PLoS ONE, Public Library of Science, 2013, 8 (2), pp.e53530. ⟨10.1371/journal.pone.0053530⟩. ⟨insu-00844939⟩

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