INVESTIGADORES
JOBBAGY GAMPEL Esteban Gabriel
artículos
Título:
Contrasting CO2 and water vapour fluxes in dry forest and pasture sites of central Argentina
Autor/es:
NOSETTO, MARCELO D.; LUNA TOLEDO, EMANUEL; MAGLIANO, PATRICIO N.; FIGUEROLA, PATRICIA; BLANCO, LISANDRO J.; JOBBÁGY, ESTEBAN G.
Revista:
ECOHYDROLOGY
Editorial:
JOHN WILEY & SONS INC
Referencias:
Año: 2020
ISSN:
1936-0584
Resumen:
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