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Shifts in plant respiration and carbon use efficiency at a large-scale drought experiment in the eastern Amazon

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dc.contributor.authorMetcalfe, Daniel B.
dc.contributor.authorMeir, Patrick
dc.contributor.authorAragão, Luiz E. O. C.
dc.contributor.authorLobo-do-Vale, Raquel
dc.contributor.authorGalbraith, David
dc.contributor.authorFisher, Rosie
dc.contributor.authorChaves, Maria Manuela
dc.contributor.authorMaroco, João
dc.contributor.authorCosta, António L. da
dc.contributor.authorAlmeida, Samuel S.
dc.contributor.authorBraga, Alan P.
dc.contributor.authorGonçalves, Paulo L.
dc.contributor.authorAthaydes, João de
dc.contributor.authorCosta, Mauricio da
dc.contributor.authorPortela, T. T. B.
dc.contributor.authorOliveira, A. A. R. de
dc.contributor.authorMalhi, Yadvinder
dc.contributor.authorWilliams, Mathew
dc.date.accessioned2012-09-22T09:58:01Z
dc.date.available2012-09-22T09:58:01Z
dc.date.issued2010
dc.description.abstractThe effects of drought on the Amazon rainforest are potentially large but remain poorly understood. Here, carbon (C) cycling after 5 yr of a large-scale through-fall exclusion (TFE) experiment excluding about 50% of incident rainfall from an eastern Amazon rainforest was compared with a nearby control plot. • Principal C stocks and fluxes were intensively measured in 2005. Additional minor components were either quantified in later site measurements or derived from the available literature. • Total ecosystem respiration (Reco) and total plant C expenditure (PCE, the sum of net primary productivity (NPP) and autotrophic respiration (Rauto)), were elevated on the TFE plot relative to the control. The increase in PCE and Reco was mainly caused by a rise in Rauto from foliage and roots. Heterotrophic respiration did not differ substantially between plots. NPP was 2.4 ± 1.4 t C ha)1 yr)1 lower on the TFE than the control. Ecosystem carbon use efficiency, the proportion of PCE invested in NPP, was lower in the TFE plot (0.24 ± 0.04) than in the control (0.32 ± 0.04). • Drought caused by the TFE treatment appeared to drive fundamental shifts in ecosystem C cycling with potentially important consequences for long-term forest C storage.por
dc.identifier.citationNew Phytologist, 187, 608-621por
dc.identifier.issn0028-646X
dc.identifier.urihttp://hdl.handle.net/10400.12/1716
dc.language.isoengpor
dc.peerreviewedyespor
dc.publisherWiley-Blackwellpor
dc.subjectAmazon rain forestpor
dc.subjectCarbon cyclingpor
dc.subjectCarbon dioxidepor
dc.subjectCarbon use efficiencypor
dc.subjectDroughtpor
dc.subjectGross primary productivitypor
dc.subjectNet primary productivitypor
dc.subjectPartitioningpor
dc.titleShifts in plant respiration and carbon use efficiency at a large-scale drought experiment in the eastern Amazonpor
dc.typejournal article
dspace.entity.typePublication
oaire.citation.conferencePlaceOxfordpor
oaire.citation.endPage621por
oaire.citation.startPage608por
oaire.citation.titleNew Phytologistpor
oaire.citation.volume187por
rcaap.rightsrestrictedAccesspor
rcaap.typearticlepor

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