Biogeosciences
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Articles | Volume 23, issue 19
Articles | Volume 23, issue 19
https://doi.org/10.5194/bg-23-6781-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-23-6781-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 23, issue 19
Research article
 | 
02 Oct 2026
Research article |  | 02 Oct 2026

Roles of planktonic metabolism in CO2 fluxes along the river-estuary continuum in a rapidly uplifting catchment of eastern Taiwan

Jhen-Nien Chen, Pei-En Chen, Yu-Shiang Yen, Tzu-Hsuan Tu, Lu-Yu Wang, Wan-Yin Lien, Yueh-Ting Lin, and Pei-Ling Wang

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Short summary
This study quantifies planktonic autotrophy and heterotrophy in the Beinan River, a tectonically active mountainous catchment in SE Taiwan. Metabolic rates were higher in the wet season, reflecting strong net heterotrophy. Scaled to the catchment, planktonic CO2 production (~7.9 x 107 mol yr-1) accounts for ~3.8% of total catchment CO2 flux. Microbial communities shifted seasonally, showing planktonic metabolism is a vital part of the riverine carbon cycle.
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