ArticleFrontiers in microbiology2026
Contrasting microbial iron metabolism in sediments from oxic and hypoxic estuaries.
Article in Frontiers in microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Estuarine sediments are pivotal zones for iron (Fe) cycling, mediated by microbial communities and coupled to carbon, nitrogen, sulfur and phosphorus transformations. However, the microbial iron metabolic processes in estuarine sediments remain poorly characterized, particularly under hypoxia. This study compared metagenomes from the Oujiang River Estuary, an oxic estuary, and the Yangtze River Estuary, a seasonally hypoxic estuary, complemented by sediment core incubations to assess geochemical responses to deoxygenation. The taxonomic affiliations of iron metabolism-related genes in the oxic estuary were homogeneous with depth, dominated by Proteobacteria and Thermodesulfobacteriota. In contrast, the hypoxic estuary exhibited strong stratification, with the surface enriched in Proteobacteria and deeper horizons dominated by Chloroflexota and
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