Articles | Volume 20, issue 12
https://doi.org/10.5194/bg-20-2369-2023
https://doi.org/10.5194/bg-20-2369-2023
Research article
 | 
22 Jun 2023
Research article |  | 22 Jun 2023

Dynamics of short-term ecosystem carbon fluxes induced by precipitation events in a semiarid grassland

Josué Delgado-Balbuena, Henry W. Loescher, Carlos A. Aguirre-Gutiérrez, Teresa Alfaro-Reyna, Luis F. Pineda-Martínez, Rodrigo Vargas, and Tulio Arredondo

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Cited articles

Aguado-Santacruz, G. A.: Efecto de factores ambientales sobre la dinámica vegetacional en pastizales de los Llanos de Ojuelos, Jalisco: un enfoque multivariable, Colegio de Postgraduados, Chapingo, México, 155 pp., 1993. 
Aguirre-Gutiérrez, C. A., Holwerda, F., Goldsmith, G. R., Delgado, J., Yepez, E., Carbajal, N., Escoto-Rodríguez, M., and Arredondo, J. T.: The importance of dew in the water balance of a continental semiarid grassland, J. Arid Environ., 168, 26–35, https://doi.org/10.1016/j.jaridenv.2019.05.003, 2019. 
Arca, V., Power, S. A., Delgado-Baquerizo, M., Pendall, E., and Ochoa-Hueso, R.: Seasonal effects of altered precipitation regimes on ecosystem-level CO2 fluxes and their drivers in a grassland from Eastern Australia, Plant Soil, 460, 435–451, https://doi.org/10.1007/s11104-020-04811-x, 2021. 
Bailey, V. L., Pries, C. H., and Lajtha, K.: What do we know about soil carbon destabilization?, Environ. Res. Lett., 14, 083004, https://doi.org/10.1088/1748-9326/ab2c11, 2019. 
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In the semiarid grassland, an increase in soil moisture at shallow depths instantly enhances carbon release through respiration. In contrast, deeper soil water controls plant carbon uptake but with a delay of several days. Previous soil conditions, biological activity, and the size and timing of precipitation are factors that determine the amount of carbon released into the atmosphere. Thus, future changes in precipitation patterns could convert ecosystems from carbon sinks to carbon sources.
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