Global meta-analysis of wood decomposition rates: a role for trait variation among tree species?

J.T. Weedon, W.K. Cornwell, J.H.C. Cornelissen, A.E. Zanne, C. Wirth, D.A. Coomes

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The carbon flux from woody debris, a crucial uncertainty within global carbon-climate models, is simultaneously affected by climate, site environment and species-based variation in wood quality. In the first global analysis attempting to explicitly tease out the wood quality contribution to decomposition, we found support for our hypothesis that, under a common climate, interspecific differences in wood traits affect woody debris decomposition patterns. A meta-analysis of 36 studies from all forested continents revealed that nitrogen, phosphorus, and C : N ratio correlate with decomposition rates of angiosperms. In addition, gymnosperm wood consistently decomposes slower than angiosperm wood within common sites, a pattern that correlates with clear divergence in wood traits between the two groups. New empirical studies are needed to test whether this difference is due to a direct effect of wood trait variation on decomposer activity or an indirect effect of wood traits on decomposition microsite environment. The wood trait-decomposition results point to an important role for changes in the wood traits of dominant tree species as a driver of carbon cycling, with likely feedback to atmospheric CO
Original languageEnglish
Pages (from-to)45-56
JournalEcology Letters
Volume12
DOIs
Publication statusPublished - 2009

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