The Input of Terrestrial Dissolved Organic Carbon Enhanced Bacteria Growth Efficiency on Phytoplankton-DOC and Indigenous Lake DOC: A Microcosm Study.

ABSTRACT: As a consequence of global climate change, lakes are increasingly receiving terrestrial dissolved organic carbon (DOC), which serves as a key substrate for microbial metabolism and fuels bacterial production (BP). However, bacteria in aquatic systems play a dual role in the carbon cycle by not only incorporating DOC into their biomass but also respiring it as CO₂ into the atmosphere (bacterial respiration, BR). As such, the estimation of bacterial growth efficiency (BGE), defined as BP/(BP + BR), is critical for understanding lake carbon dynamics and bacterial carbon processing. To investigate the effects of terrestrial organic carbon on bacterial carbon processing in lakes, we conducted a ¹³C-labeling experiment utilizing three microcosms, each filled with 0.22 μm fi

SUBMITTER: Jin Z 

PROVIDER: S-EPMC12472250 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature