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.
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.
the Creative Commons Attribution 4.0 License.
Research article
| 
02 Oct 2026
Research article |
| 02 Oct 2026
| 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
Department of Geosciences, National Taiwan University, Taipei, Taiwan
Taiwan Ocean Research Institute, National Institutes of Applied Research, Kaohsiung, Taiwan
Pei-En Chen
Institute of Oceanography, National Taiwan University, Taipei, Taiwan
Yu-Shiang Yen
Department of Geosciences, National Taiwan University, Taipei, Taiwan
Tzu-Hsuan Tu
Department of Oceanography, National Sun Yat-sen University, Kaohsiung, Taiwan
Marine-Science-Oriented Ocean Technology Implementation Center, National Sun Yat-sen University, Kaohsiung, Taiwan
Institute of Marine Ecology and Conservation, National Sun Yat-sen University, Kaohsiung, Taiwan
Lu-Yu Wang
Department of Geosciences, National Taiwan University, Taipei, Taiwan
Wan-Yin Lien
Department of Geosciences, National Taiwan University, Taipei, Taiwan
Yueh-Ting Lin
Taiwan Ocean Research Institute, National Institutes of Applied Research, Kaohsiung, Taiwan
Institute of Oceanography, National Taiwan University, Taipei, Taiwan
Institute of Oceanography, National Taiwan University, Taipei, Taiwan
Science and Technology Research Institute for Decarbonization, National Taiwan University, Taipei, Taiwan
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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.
This study quantifies planktonic autotrophy and heterotrophy in the Beinan River, a tectonically...
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