Biogeosciences
Biogeosciences
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Articles | Volume 22, issue 23
Articles | Volume 22, issue 23
https://doi.org/10.5194/bg-22-7769-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-7769-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 22, issue 23
Research article
 | 
08 Dec 2025
Research article |  | 08 Dec 2025

Benthic macrofaunal carbon fluxes and environmental drivers of spatial variability in a large coastal-plain estuary

Seyi Ajayi, Raymond Najjar, Emily Rivest, Ryan Woodland, Marjorie A. M. Friedrichs, Pierre St-Laurent, and Spencer Davis

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Short summary
Even though bottom-dwelling animals in coastal waters are well studied, their impact on carbon cycling is unclear. We analyzed thousands of bivalves in Chesapeake Bay to understand what shapes their distribution and role in carbon movement. Bivalves were most abundant in shallow, low-salinity waters with moderate oxygen and high nitrate. They use 18–45 % of available carbon in the Upper Bay, and their carbon dioxide output exceeds what escapes into the air, highlighting their ecosystem impact.
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