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Title

A global experiment suggests climate warming will not accelerate litter decomposition in streams but might reduce carbon sequestration

AuthorsBoyero, Luz ; Pearson, R.G.; Gessner, M.O.; Barmuta, L.A.; Ferreira, V.; Graça, M.A.S.; Dudgeon, D.; Boulton, A.J.; Callisto, M.; Chauvet, E.
Issue Date2011
PublisherBlackwell Publishing
CitationEcology Letters 14: 289- 294 (2011)
AbstractThe decomposition of plant litter is one of the most important ecosystem processes in the biosphere and is particularly sensitive to climate warming. Aquatic ecosystems are well suited to studying warming effects on decomposition because the otherwise confounding influence of moisture is constant. By using a latitudinal temperature gradient in an unprecedented global experiment in streams, we found that climate warming will likely hasten microbial litter decomposition and produce an equivalent decline in detritivore-mediated decomposition rates. As a result, overall decomposition rates should remain unchanged. Nevertheless, the process would be profoundly altered, because the shift in importance from detritivores to microbes in warm climates would likely increase CO2 production and decrease the generation and sequestration of recalcitrant organic particles. In view of recent estimates showing that inland waters are a significant component of the global carbon cycle, this implies consequences for global biogeochemistry and a possible positive climate feedback. © 2011 Blackwell Publishing Ltd/CNRS.
URIhttp://hdl.handle.net/10261/62685
DOI10.1111/j.1461-0248.2010.01578.x
Identifiersdoi: 10.1111/j.1461-0248.2010.01578.x
issn: 1461-023X
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