Eutrophication shifts microbial communities and life-history strategies in the Yangtze River Estuary.

ABSTRACT: Marginal seas are increasingly impacted by anthropogenic activities, leading to widespread eutrophication, yet the responses of marine microbial communities remain poorly understood. We compared sediments from the highly eutrophic Yangtze River Estuary (YRE) and the oligotrophic East China Sea (ECS) to examine how eutrophication alters microbial abundance, community structure, assembly processes, functional profiles, and life-history strategies. Our results showed that YRE sediments harbored significantly higher microbial abundance (1.3 × 10⁸-1.1 × 10⁹ cells g^-1 vs. 8.0 × 10⁷-7.1 × 10⁸ cells g^-1), Chao1 richness (9,782-18,129 vs. 9,366-14,903), and Shannon diversity (6.19-7.47 vs. 6.05-7.07). Functional profiling revealed an

SUBMITTER: Li H 

PROVIDER: S-EPMC12493985 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature