Use este identificador para citar ou linkar para este item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1091469
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dc.contributor.authorROWLAND, L.
dc.contributor.authorCOSTA, A. C. L. da
dc.contributor.authorOLIVEIRA, A. A. R.
dc.contributor.authorOLIVEIRA, R. S.
dc.contributor.authorBITTENCOURT, P. L.
dc.contributor.authorCOSTA, P. B.
dc.contributor.authorGILES, A. L.
dc.contributor.authorSOSA, A. I.
dc.contributor.authorCOUGHLIN, I.
dc.contributor.authorGODLEE, J. L.
dc.contributor.authorVASCONCELOS, S. S.
dc.contributor.authorS. JUNIOR, J. A.
dc.contributor.authorFERREIRA, L. V.
dc.contributor.authorMENCUCCINI, M.
dc.contributor.authorMEIR, P.
dc.date.accessioned2018-05-16T00:50:06Z-
dc.date.available2018-05-16T00:50:06Z-
dc.date.created2018-05-15
dc.date.issued2018
dc.identifier.citationNew Phytologist, v. 218, n. 4, p. 1393-1405, June 2018.
dc.identifier.urihttp://www.alice.cnptia.embrapa.br/alice/handle/doc/1091469-
dc.descriptionCO2 efflux from stems (CO2_stem) accounts for a substantial fraction of tropical forest gross primary productivity, but the climate sensitivity of this flux remains poorly understood. We present a study of tropical forest CO2_stem from 215 trees across wet and dry seasons, at the world?s longest running tropical forest drought experiment site. We show a 27% increase in wet season CO2_stem in the droughted forest relative to a control forest. This was driven by increasing CO2_stem in trees 10?40 cm diameter. Furthermore, we show that drought increases the proportion of maintenance to growth respiration in trees > 20 cm diameter, including large increases in maintenance respiration in the largest droughted trees, > 40 cm diameter. However, we found no clear taxonomic influence on CO2_stem and were unable to accurately predict how drought sensitivity altered ecosystem scale CO2_stem, due to substantial uncertainty introduced by contrasting methods previously employed to scale CO2_stem fluxes. Our findings indicate that under future scenarios of elevated drought, increases in CO2_stem may augment carbon losses, weakening or potentially reversing the tropical forest carbon sink. However, due to substantial uncertainties in scaling CO2_stem fluxes, stand-scale future estimates of changes in stem CO2 emissions remain highly uncertain.
dc.language.isoengeng
dc.rightsopenAccesseng
dc.subjectEstresse hídrico
dc.titleDrought stress and tree size determine stem CO2 efflux in a tropical forest.
dc.typeArtigo de periódico
dc.date.updated2018-05-22T11:11:11Zpt_BR
dc.subject.thesagroCarbono
dc.subject.thesagroFloresta
dc.subject.thesagroFloresta Tropical
riaa.ainfo.id1091469
riaa.ainfo.lastupdate2018-05-22 -03:00:00
dc.identifier.doi10.1111/nph.15024
dc.contributor.institutionLucy Rowland, University of Exeter; Antonio C. L. da Costa, UFPA; Alex A. R. Oliveira, MPEG; Rafael S. Oliveira, UNICAMP; Paulo L. Bittencourt, UNICAMP; Patricia B. Costa, UNICAMP; Andre L. Giles, UNICAMP; Azul I. Sosa, UNICAMP; Ingrid Coughlin, USP; John L. Godlee, University of Edinburgh; STEEL SILVA VASCONCELOS, CPATU; João A. S. Junior, UFPA; Leandro V. Ferreira, MPEG; Maurizio Mencuccini, CREAF / ICREA; Patrick Meir, University of Edinburgh / Australian National University.
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