Data for Wilson and Megonigal (2025), "Nitrate reduction across soils transitioning from coastal forest to wetland are hotspots for denitrification"

Sea level rise drives spatial migration of coastal ecosystems and can lead to the accelerated replacement of coastal forests with tidal wetlands. Soil biogeochemical cycles in steady-state upland and wetland ecosystems are well studied, but pathways and rates in rapidly changing ecosystems are largely unconstrained. Wilson and Megonigal (2025) performed a one-time sampling and a subsequent incubation experiment, and characterized the reduction of reactive nitrogen (N) via denitrification and dissimilatory nitrate reduction to ammonia. Sampling was done at four sites where coastal deciduous forest is undergoing ecosystem state change and becoming wetland throughout the Chesapeake Bay, USA. The COMPASS-FME project (http://compass.pnnl.gov) established the sites sampled in this study in 2022–2023. This dataset consists of: * Isotope-labeled incubation results comparing nitrate reduction rates across transects spanning upland, transition, and wetland; and * Ancillary porewater chemistry data. All files in this dataset are plain text, comma-separated value (CSV), and no special software is required to read them.

海平面上升驱动沿海生态系统发生空间迁移，并可加速潮汐湿地对沿海森林的替代过程。稳态旱地与湿地生态系统的土壤生物地球化学循环已得到充分研究，但快速演变生态系统中的循环路径与速率仍在很大程度上缺乏定量约束。Wilson与Megonigal（2025）开展了单次采样及后续的室内培养实验，通过反硝化作用（denitrification）与异化硝酸盐还原产氨（dissimilatory nitrate reduction to ammonia）两条途径表征了活性氮（reactive nitrogen, N）的还原过程。采样工作在美国切萨皮克湾（Chesapeake Bay）的4处样点开展，这些样点所在的沿海落叶林正经历生态系统状态转变，逐步演化为湿地。COMPASS-FME项目（http://compass.pnnl.gov）于2022至2023年间设立了本研究的采样样点。本数据集包含以下两类内容：① 同位素标记培养实验结果，用于对比覆盖旱地、过渡带与湿地的样带内的硝酸盐还原速率；② 辅助孔隙水化学数据。本数据集内所有文件均为纯文本格式与逗号分隔值（CSV）格式，无需专用软件即可读取。