Show simple item record

resumen

Abstract
The dry forests of South America are a key player of the global carbon cycle and the regional water cycle, but they are being intensively deforested. We used eddy covariance measurements to compare the temporal patterns of CO2 and water vapour fluxes and their relationships with environmental variables in dry forest and pastures sites of central Argentina. Ecosystem fluxes showed clear contrasts in magnitude, timing and response to environmental controls [ver mas...]
dc.contributor.authorNosetto, Marcelo
dc.contributor.authorLuna Toledo, Emanuel Santiago
dc.contributor.authorMagliano, Patricio Nicolás
dc.contributor.authorFiguerola, Patricia
dc.contributor.authorBlanco, Lisandro Javier
dc.contributor.authorJobbagy Gampel, Esteban Gabriel
dc.date.accessioned2020-10-02T20:09:18Z
dc.date.available2020-10-02T20:09:18Z
dc.date.issued2020-08
dc.identifier.issn1936-0592
dc.identifier.otherhttps://doi.org/10.1002/eco.2244
dc.identifier.urihttp://hdl.handle.net/20.500.12123/8003
dc.identifier.urihttps://onlinelibrary.wiley.com/doi/abs/10.1002/eco.2244
dc.description.abstractThe dry forests of South America are a key player of the global carbon cycle and the regional water cycle, but they are being intensively deforested. We used eddy covariance measurements to compare the temporal patterns of CO2 and water vapour fluxes and their relationships with environmental variables in dry forest and pastures sites of central Argentina. Ecosystem fluxes showed clear contrasts in magnitude, timing and response to environmental controls between ecosystems. The dry forest displayed higher daily gross primary productivity (GPP, 10.6 vs. 7.8 g CO2 m−2 d−1) and ecosystem respiration (Reco, 9.1 vs. 7.0 g CO2 m−2 d−1) and lower net ecosystem exchange (NEE, −1.5 vs. −0.7 g CO2 m−2 d−1) than the pasture. These differences were explained by a lower tolerance of the pasture to cool temperatures and drought. The lowest NEE rates were observed between 26°C and 34°C in the pasture, but below this range, NEE increased sharply, switching to a carbon source with temperatures <20°C. By contrast, the dry forest remained as a strong carbon sink down to 18°C. The pasture also showed a stronger drop of GPP with drought compared with the dry forest, becoming a carbon source with soil wetness <25% of soil available water. Rainfall was strongly coupled with GPP in both ecosystems, but the dry forest responded to longer rainfall integration periods. This study helps to understand how ecosystems can respond to climate change, improve global scale modelling and increase the productivity and resilience of rangelands.eng
dc.formatapplication/pdfes_AR
dc.language.isoenges_AR
dc.publisherWileyes_AR
dc.rightsinfo:eu-repo/semantics/restrictedAccesses_AR
dc.sourceEcohydrology (First published: 24 August 2020)es_AR
dc.subjectBosqueses_AR
dc.subjectForestseng
dc.subjectBalance Hídricoes_AR
dc.subjectWater Balanceeng
dc.subjectDióxido de Carbonoes_AR
dc.subjectCarbon Dioxideeng
dc.subjectPastizaleses_AR
dc.subjectPastureseng
dc.subjectLluviaes_AR
dc.subjectRaineng
dc.subject.otherCO2es_AR
dc.titleContrasting CO2 and water vapour fluxes in dry forest and pasture sites of central Argentinaes_AR
dc.typeinfo:ar-repo/semantics/artículoes_AR
dc.typeinfo:eu-repo/semantics/articlees_AR
dc.typeinfo:eu-repo/semantics/publishedVersiones_AR
dc.description.origenEEA La Riojaes_AR
dc.description.filFil: Nosetto, Marcelo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Matemática Aplicada de San Luis. Grupo de Estudios Ambientales; Argentina. Universidad Nacional de San Luis; Argentina. Universidad Nacional de Entre Ríos. Facultad de Ciencias Agropecuarias. Cátedra de Climatología Agrícola; Argentinaes_AR
dc.description.filFil: Luna Toledo, Emanuel Santiago. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria La Rioja; Argentina. Universidad Nacional de Chilecito. Instituto de Ambiente de Montaña y Regiones Áridas; Argentinaes_AR
dc.description.filFil: Magliano, Patricio Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Matemática Aplicada de San Luis. Grupo de Estudios Ambientales; Argentina. Universidad Nacional de San Luis. Facultad de Química, Bioquímica y Farmacia. Departamento de Bioquímica y Ciencias Biológicas; Argentinaes_AR
dc.description.filFil: Figuerola, Patricia. Universidad Nacional de Chilecito. Instituto de Ambiente de Montaña y Regiones Áridas; Argentinaes_AR
dc.description.filFil: Blanco, Lisandro Javier. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria La Rioja; Argentinaes_AR
dc.description.filFil: Jobbagy Gampel, Esteban Gabriel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico San Luis. Instituto de Matemática Aplicada de San Luis. Grupo de Estudios Ambientales; Argentina. Universidad Nacional de San Luis; Argentinaes_AR
dc.subtypecientifico


Files in this item

Thumbnail

This item appears in the following Collection(s)

common

Show simple item record