Contrasting CO2 and water vapour fluxes in dry forest and pasture sites of central Argentina
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 variab...
| Autores principales: | , , , , , |
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| Formato: | info:ar-repo/semantics/artículo |
| Lenguaje: | Inglés |
| Publicado: |
Wiley
2020
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| Materias: | |
| Acceso en línea: | http://hdl.handle.net/20.500.12123/8003 https://onlinelibrary.wiley.com/doi/abs/10.1002/eco.2244 https://doi.org/10.1002/eco.2244 |
| _version_ | 1855035958638936064 |
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| author | Nosetto, Marcelo Daniel Luna Toledo, Emanuel Santiago Magliano, Patricio Nicolás Figuerola, Patricia Blanco, Lisandro Javier Jobbagy Gampel, Esteban Gabriel |
| author_browse | Blanco, Lisandro Javier Figuerola, Patricia Jobbagy Gampel, Esteban Gabriel Luna Toledo, Emanuel Santiago Magliano, Patricio Nicolás Nosetto, Marcelo Daniel |
| author_facet | Nosetto, Marcelo Daniel Luna Toledo, Emanuel Santiago Magliano, Patricio Nicolás Figuerola, Patricia Blanco, Lisandro Javier Jobbagy Gampel, Esteban Gabriel |
| author_sort | Nosetto, Marcelo Daniel |
| collection | INTA Digital |
| description | 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 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. |
| format | info:ar-repo/semantics/artículo |
| id | INTA8003 |
| institution | Instituto Nacional de Tecnología Agropecuaria (INTA -Argentina) |
| language | Inglés |
| publishDate | 2020 |
| publishDateRange | 2020 |
| publishDateSort | 2020 |
| publisher | Wiley |
| publisherStr | Wiley |
| record_format | dspace |
| spelling | INTA80032023-04-26T19:44:41Z Contrasting CO2 and water vapour fluxes in dry forest and pasture sites of central Argentina Nosetto, Marcelo Daniel Luna Toledo, Emanuel Santiago Magliano, Patricio Nicolás Figuerola, Patricia Blanco, Lisandro Javier Jobbagy Gampel, Esteban Gabriel Bosques Balance Hídrico Dióxido de Carbono Pastizales Lluvia Forests Water Balance Carbon Dioxide Pastures Rain CO2 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 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. EEA La Rioja Fil: 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; Argentina Fil: 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; Argentina Fil: 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; Argentina Fil: Figuerola, Patricia. Universidad Nacional de Chilecito. Instituto de Ambiente de Montaña y Regiones Áridas; Argentina Fil: Blanco, Lisandro Javier. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria La Rioja; Argentina Fil: 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; Argentina 2020-10-02T20:09:18Z 2020-10-02T20:09:18Z 2020-08 info:ar-repo/semantics/artículo info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://hdl.handle.net/20.500.12123/8003 https://onlinelibrary.wiley.com/doi/abs/10.1002/eco.2244 1936-0592 https://doi.org/10.1002/eco.2244 eng info:eu-repo/semantics/restrictedAccess application/pdf Wiley Ecohydrology (First published: 24 August 2020) |
| spellingShingle | Bosques Balance Hídrico Dióxido de Carbono Pastizales Lluvia Forests Water Balance Carbon Dioxide Pastures Rain CO2 Nosetto, Marcelo Daniel Luna Toledo, Emanuel Santiago Magliano, Patricio Nicolás Figuerola, Patricia Blanco, Lisandro Javier Jobbagy Gampel, Esteban Gabriel Contrasting CO2 and water vapour fluxes in dry forest and pasture sites of central Argentina |
| title | Contrasting CO2 and water vapour fluxes in dry forest and pasture sites of central Argentina |
| title_full | Contrasting CO2 and water vapour fluxes in dry forest and pasture sites of central Argentina |
| title_fullStr | Contrasting CO2 and water vapour fluxes in dry forest and pasture sites of central Argentina |
| title_full_unstemmed | Contrasting CO2 and water vapour fluxes in dry forest and pasture sites of central Argentina |
| title_short | Contrasting CO2 and water vapour fluxes in dry forest and pasture sites of central Argentina |
| title_sort | contrasting co2 and water vapour fluxes in dry forest and pasture sites of central argentina |
| topic | Bosques Balance Hídrico Dióxido de Carbono Pastizales Lluvia Forests Water Balance Carbon Dioxide Pastures Rain CO2 |
| url | http://hdl.handle.net/20.500.12123/8003 https://onlinelibrary.wiley.com/doi/abs/10.1002/eco.2244 https://doi.org/10.1002/eco.2244 |
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