Dataset: Tidal and nontidal marsh restoration: a trade-off between carbon sequestration, methane emissions, and soil accretion

Soil cores were collected at wetlands that had been restored for a minimum of 10 years with managed hydrology in Twitchell and Sherman Islands in the western portion of the Sacramento-San Joaquin Delta, California. The goal of the study was to measure soil carbon accumulation rates since restoration for comparison with multiyear net atmospheric carbon exchange measured by eddy covariance towers. Soil cores were sliced at 1 to 3 cm-thick intervals and analyzed for bulk density, organic matter, organic and inorganic carbon, total nitrogen and their stable isotopes, and 210Pb specific activities. Emergent vegetation was present at the sites. Dominant species at the core locations included Schoenoplectus acutus, Typha sp, and Phragmites sp. This dataset accompanies the paper Arias-Ortiz et al. under consideration in JGR: Biogeosciences.

本研究于美国加利福尼亚州萨克拉门托-圣华金三角洲（Sacramento-San Joaquin Delta）西部的特威切尔岛与谢尔曼岛开展，采样对象为经至少10年人工水文调控修复的湿地，共采集土壤岩芯（soil cores）。本研究的核心目标为测定湿地修复以来的土壤碳累积速率，以与涡度协方差塔（eddy covariance towers）观测得到的多年净大气碳交换量开展对比分析。将采集的土壤岩芯以1~3 cm为间隔进行切片，并对其容重、有机质、有机碳与无机碳、总氮及其稳定同位素，以及210Pb比活度进行分析测试。样地内分布有挺水植被，岩芯采样点的优势物种包括尖秆藨草（Schoenoplectus acutus）、香蒲属（Typha sp.）及芦苇属（Phragmites sp.）。本数据集配套于Arias-Ortiz等人提交至《地球物理研究杂志：生物地球科学分册》（JGR: Biogeosciences）的待审论文。