Benthic nitrogen fixation rates and environmental parameters from tidal wetlands and aquaculture ponds in the Dagu River Estuary (2023–2024)

This dataset includes measurements of benthic nitrogen fixation (BNF) rates derived from 15N tracer incubations and associated sediment biogeochemical variables collected from natural tidal wetlands and aquaculture-reclaimed sediments in the Dagu River Estuary during 2023–2024. These data support the manuscript entitled“Drastic suppression of benthic nitrogen fixation by restructuring diazotrophic communities following tidal wetland conversion to aquaculture ponds.”BNF rates were quantified using 15N isotope tracer techniques, and environmental parameters include nutrient concentrations, sediment geochemical characteristics, and overlying water properties. All variables are described in detail in the accompanying L&O Letters Metadata Template.