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

Metcalfe, D. B.; Meir, Patrick; Arageo, L.E.O.C.; Lobo-do-Vale, Raquel; Galbraith, David; Fisher, Rosie; Chaves, Manuela M; Maroco, J. P.; da Costa, Antonio Carlos Lola; de Almeida, Samuel S.; Braga, Alan; de Goncalves, Paulo H. L

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The 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...[Show more]

dc.contributor.authorMetcalfe, D. B.
dc.contributor.authorMeir, Patrick
dc.contributor.authorArageo, L.E.O.C.
dc.contributor.authorLobo-do-Vale, Raquel
dc.contributor.authorGalbraith, David
dc.contributor.authorFisher, Rosie
dc.contributor.authorChaves, Manuela M
dc.contributor.authorMaroco, J. P.
dc.contributor.authorda Costa, Antonio Carlos Lola
dc.contributor.authorde Almeida, Samuel S.
dc.contributor.authorBraga, Alan
dc.contributor.authorde Goncalves, Paulo H. L
dc.date.accessioned2015-12-13T22:43:51Z
dc.identifier.issn0028-646X
dc.identifier.urihttp://hdl.handle.net/1885/79387
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.
dc.publisherCambridge University Press
dc.sourceNew Phytologist
dc.subjectKeywords: carbon; carbon dioxide; carbon dioxide; carbon fixation; carbon flux; drought; experimental study; net primary production; partitioning; plant community; rainforest; respiration; article; bacterium; Brazil; cell respiration; drought; ecosystem; metabolism Amazon rain forest; Carbon cycling; Carbon dioxide; Carbon use efficiency; Drought; Gross primary productivity; Net primary productivity; Partitioning
dc.titleShifts in plant respiration and carbon use efficiency at a large-scale drought experiment in the eastern Amazon
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume187
dc.date.issued2010
local.identifier.absfor060705 - Plant Physiology
local.identifier.ariespublicationf5625xPUB7838
local.type.statusPublished Version
local.contributor.affiliationMetcalfe, D. B., University of Oxford
local.contributor.affiliationMeir, Patrick, College of Medicine, Biology and Environment, ANU
local.contributor.affiliationArageo, L.E.O.C., University of Exeter
local.contributor.affiliationLobo-do-Vale, Raquel, Universidade Tecnica de Lisboa
local.contributor.affiliationGalbraith, David, University of Oxford
local.contributor.affiliationFisher, Rosie, Los Alamos National Laboratory
local.contributor.affiliationChaves, Manuela M, Universidade Tecnica de Lisboa
local.contributor.affiliationMaroco, J. P., Instituto de Tecnologia Quimica e Biologica
local.contributor.affiliationda Costa, Antonio Carlos Lola , Universidade Federal do Para
local.contributor.affiliationde Almeida, Samuel S., Museu Paraense Emilio Goeldi
local.contributor.affiliationBraga, Alan, Universidade Federal do Para
local.contributor.affiliationde Goncalves, Paulo H. L, Universidade Federal do Para
local.description.embargo2037-12-31
local.bibliographicCitation.issue3
local.bibliographicCitation.startpage608
local.bibliographicCitation.lastpage621
local.identifier.doi10.1111/j.1469-8137.2010.03319.x
local.identifier.absseo970106 - Expanding Knowledge in the Biological Sciences
dc.date.updated2016-02-24T09:37:43Z
local.identifier.scopusID2-s2.0-77955165643
local.identifier.thomsonID000280122500009
CollectionsANU Research Publications

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