On the Relationship Between Aquatic CO2 Concentration and Ecosystem Fluxes in Some of the World’s Key Wetland Types

Jessica L. Richardson*, Ankur R. Desai, Jonathan Thom, Kim Lindgren, Hjalmar Laudon, Matthias Peichl, Mats Nilsson, Audrey Campeau, Järvi Järveoja, Peter Hawman, Deepak R. Mishra, Dontrece Smith, Brenda D’Acunha, Sara H. Knox, Darian Ng, Mark S. Johnson, Joshua Blackstock, Sparkle L. Malone, Steve F. Oberbauer, Matteo DettoKimberly P. Wickland, Inke Forbrich, Nathaniel Weston, Jacqueline K.Y. Hung, Colin Edgar, Eugenie S. Euskirchen, Syndonia Bret-Harte, Jason Dobkowski, George Kling, Evan S. Kane, Pascal Badiou, Matthew Bogard, Gil Bohrer, Thomas O’Halloran, Jonny Ritson, Ariane Arias-Ortiz, Dennis Baldocchi, Patty Oikawa, Julie Shahan, Maiyah Matsumura

*Autor correspondiente de este trabajo

Producción científica: Contribución a una revistaArtículoInvestigaciónrevisión exhaustiva


To understand patterns in CO2 partial pressure (PCO2) over time in wetlands’ surface water and porewater, we examined the relationship between PCO2 and land–atmosphere flux of CO2 at the ecosystem scale at 22 Northern Hemisphere wetland sites synthesized through an open call. Sites spanned 6 major wetland types (tidal, alpine, fen, bog, marsh, and prairie pothole/karst), 7 Köppen climates, and 16 different years. Ecosystem respiration (Reco) and gross primary production (GPP), components of vertical CO2 flux, were compared to PCO2, a component of lateral CO2 flux, to determine if photosynthetic rates and soil respiration consistently influence wetland surface and porewater CO2 concentrations across wetlands. Similar to drivers of primary productivity at the ecosystem scale, PCO2 was strongly positively correlated with air temperature (Tair) at most sites. Monthly average PCO2 tended to peak towards the middle of the year and was more strongly related to Reco than GPP. Our results suggest Reco may be related to biologically driven PCO2 in wetlands, but the relationship is site-specific and could be an artifact of differently timed seasonal cycles or other factors. Higher levels of discharge do not consistently alter the relationship between Reco and temperature normalized PCO2. This work synthesizes relevant data and identifies key knowledge gaps in drivers of wetland respiration.

Idioma originalInglés
Número de artículo1
Número de páginas20
EstadoPublicada - 5 dic 2023


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