Chamber level gas fluxes and soil biogeochemical properties from a tidal salt marsh and an impounded brackish wetland in South Carolina, USA

Archived data from a research project assessing the role of plants in driving methane fluxes from coastal wetland systems. Data collection occurred at the inland edge of a salt marsh and a diked, brackish impounded wetland in Georgetown County, South Carolina during 2022 and 2023. The first archived data table includes soil biogeochemical properties for all soil samples (0-10 cm and 10-50 cm mineral soil depth) collected approximately monthly from our two study sites. Specific biogeochemical properties include copy numbers of the mCRA gene, soil C and N concentrations, soil C:N ratios, soil moisture, pH, conductivity, organic matter content and alive and dead root biomass. The second archived data table includes methane and carbon dioxide fluxes from chambers over plants (whole-plant gas fluxes), adjacent to plants (plant-adjacent chambers) and in non-vegetated areas (non-vegetated fluxes) measured approximately monthly at our two study sites. Metadata associated with flux measurements are also included: leaf area, dead stems, oxidation reduction potential at four depths, atmospheric pressure, incoming solar radiation, relative humidity, chamber temperature, windspeed, water salinity, water temperature and water column depth.

本数据集为某科研项目的存档数据，该项目旨在评估植物在驱动滨海湿地系统甲烷通量中所发挥的作用。数据采集工作于2022年至2023年间，在美国南卡罗来纳州乔治敦县的两处研究样地开展，分别为盐沼内陆边缘带与一处筑坝截留的咸淡水湿地。首个存档数据表涵盖了两处研究样地约每月采集的全部土壤样品的土壤生物地球化学特性，样品采集深度分为0-10 cm与10-50 cm矿质土壤层。具体测定的生物地球化学属性包括：mCRA基因（mCRA gene）拷贝数、土壤碳氮浓度、土壤碳氮比、土壤含水率、pH值、电导率、有机质含量，以及活根与死根生物量。第二个存档数据表涵盖了两处研究样地约每月测定的气体通量数据，分别为植物冠层箱法测定的整株植物气体通量（含甲烷与二氧化碳通量）、植物邻近区域箱法测定的气体通量，以及无植被区域的气体通量。此外还附带了通量测定相关的元数据：叶面积、枯茎数量、四个深度的氧化还原电位、大气压力、入射太阳辐射、相对湿度、箱内温度、风速、水体盐度、水温以及水柱深度。