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

<i>This dataset includes measurements of benthic nitrogen fixation (BNF) rates derived from </i>^<em>15</em><i>N tracer incubations and associated sediment biogeochemical variables collected from natural tidal wetlands and aquaculture-reclaimed sediments in the Dagu River Estuary during 2023</i><i>–</i><i>2024. These data support the manuscript entitled</i><i>“</i><i>Drastic suppression of benthic nitrogen fixation by restructuring diazotrophic communities following tidal wetland conversion to aquaculture ponds.</i><i>”</i><i>BNF rates were quantified using </i>^<em>15</em><i>N 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&amp;O Letters Metadata Template.</i>