Ecosystem-atmosphere CO2 exchange from semiarid mangroves in the Gulf of California

Martha L. Vargas-Terminel, Julio C. Rodríguez, Enrico A. Yépez, Carlos A. Robles-Zazueta, Christopher Watts, Jaime Garatuza-Payán, Rodrigo Vargas, Zulia M. Sanchez-Mejia*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Mangrove wetlands play an essential role as blue carbon ecosystems. However, worldwide they also face imminent threats caused by anthropogenic activities and climate change. Mangroves in the semiarid region of the Gulf of California are highly vulnerable to both threats. In this study, we present eddy covariance measurements of net ecosystem exchange of CO2 (NEE), gross primary productivity (GPP), and ecosystem respiration (Reco) at a preserved mangrove (Estero El Sargento) and a site influenced by anthropogenic activities (Bahia del Tobari) located in northwest Mexico. Both sites were net annual carbon sinks but had different dynamics. The net annual carbon gain for Estero El Sargento was −717 g C m−2 y−1 while for Bahia deTobari was −247 g C m−2 y−1. Over the studied year, Estero El Sargento had lower Reco(329 g C m−2) during the winter-spring months and an overall lower annual Reco/GPP (0.42) than Bahia de Tobari. The Reco was notably high during the winter-spring period at Bahia de Tobari when agriculture drainage from the intensive food production activities at the Yaqui Valley reaches the bay. The contrasting NEE patterns and magnitude between both mangrove sites suggest that anthropogenic activities influencing coastal ecosystems exert an important control on the CO2 sink potential.

Original languageEnglish
Article number104872
JournalJournal of Arid Environments
Volume208
DOIs
StatePublished - Jan 2023
Externally publishedYes

Bibliographical note

Funding Information:
This work was possible due to the financial support from Consejo Nacional de Ciencia y Tecnología given to JCR ( CB180704-T ), as well as, the graduate scholarships awarded to MLVT (#292661 and # 542178) and CARZ. (#336428) and to PROFAPI-ITSON fund. We want to thank to the Seri community in Estero El Sargento for lending the property for the tower installation and Mr. Marco González from Bahia de Tobari for the technical assistance during the realization of this study. We are equally grateful to Miguel A. Rivera-Díaz, Masuly Vega-Puga, Marco A. González Pelayo and Lucia Nevešćanin-Moreno for the support given during fieldwork, equipment installation and maintenance, data downloading and processing. Finally, we thank Dr. Alejandro Cueva Rodríguez for the help provided for the uncertainty analysis.

Funding Information:
This work was possible due to the financial support from Consejo Nacional de Ciencia y Tecnología given to JCR (CB180704-T), as well as, the graduate scholarships awarded to MLVT (#292661 and # 542178) and CARZ. (#336428) and to PROFAPI-ITSON fund. We want to thank to the Seri community in Estero El Sargento for lending the property for the tower installation and Mr. Marco González from Bahia de Tobari for the technical assistance during the realization of this study. We are equally grateful to Miguel A. Rivera-Díaz, Masuly Vega-Puga, Marco A. González Pelayo and Lucia Nevešćanin-Moreno for the support given during fieldwork, equipment installation and maintenance, data downloading and processing. Finally, we thank Dr. Alejandro Cueva Rodríguez for the help provided for the uncertainty analysis.

Publisher Copyright:
© 2022 Elsevier Ltd

Keywords

  • Blue carbon
  • Eddy covariance
  • MexFlux
  • Sea of Cortez

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