Dataset - Limited site-specific blue carbon recovery following tropical seagrass restoration in Thailand.

This dataset accompanies the manuscript “Limited site-specific blue carbon recovery following tropical seagrass restoration in Thailand” and provides field and laboratory measurements used to quantify sedimentary blue carbon dynamics in restored tropical seagrass meadows. Sediment cores were collected from three habitat types: (1) restored seagrass meadows, (2) adjacent natural seagrass meadows, and (3) bare sand reference areas at several sites along the south coast of Thailand (Andaman Sea and Gulf of Thailand), including Bang Phat, Boonkhon Bay, Koh Teab, Modtanoi, and Phang Nga. For each sediment slice, we measured organic matter (OM, %) and organic carbon (OC, %) content along the profile, typically down to ~1 m depth. Whole-core organic carbon stocks were then calculated and expressed as Mg C ha⁻¹. To estimate sediment and carbon accumulation, a subset of cores was analysed for radionuclides, including total and excess 210Pb and 226Ra, from which compaction-corrected depths and depth profiles were derived. The dataset is organised into three main data tables plus supporting metadata: “Sediment properties” – slice-level data (n ≈ 838) including Site, SampleID, Restoration_year, Type (Bare_sand, Restored, Natural), OM(%), OC(%), and Depth(cm). “Organic carbon stock” – core-level data (n ≈ 26) summarising Site, CoreID, Restoration_year, Type, and TotalCarbonCore (Mg/ha). “Sediment and carbon accumulation” – slice-level radionuclide data (n ≈ 547) including Site, Type, CoreID, Compaction_corrected_depth (cm), Total 210Pb_mean, Total 210Pb_sd, Ra-226_mean, Ra-226_sd, Excess 210Pb_mean, and Excess 210Pb_sd. “Metadata” – definitions and units for all variables, including codes used for habitat type and measurement units.本数据集配套于研究论文"《泰国热带海草修复后位点特异性蓝碳恢复有限》"，包含用于量化修复型热带海草床沉积蓝碳动态的野外与实验室测量数据。 研究团队从泰国南部沿岸（安达曼海与泰国湾）的多个采样位点采集沉积物岩芯，共涉及三类生境类型：(1) 修复型海草床、(2) 邻近的天然海草床，以及(3) 裸沙对照区域，采样位点涵盖Bang Phat、Boonkhon Bay、Koh Teab、Modtanoi与Phang Nga。 针对每一节沉积物切片，研究人员沿沉积剖面测定了有机质（OM，%）与有机碳（OC，%）含量，采样深度通常可达约1米。随后计算得到全岩芯有机碳储量，单位以Mg C ha⁻¹表示。为估算沉积物与碳的积累速率，研究人员对部分岩芯开展了放射性核素分析，涵盖总²¹⁰Pb、过剩²¹⁰Pb以及²²⁶Ra，并由此推导得到经压实校正的深度与深度剖面数据。 本数据集包含三张核心数据表及配套元数据： "沉积物属性"——切片级数据（样本量约838），包含位点（Site）、样本ID（SampleID）、修复年份（Restoration_year）、生境类型（Type，取值为Bare_sand、Restored、Natural）、有机质含量（OM(%)）、有机碳含量（OC(%)）以及深度（Depth(cm)）。 "有机碳储量"——岩芯级数据（样本量约26），涵盖位点（Site）、岩芯ID（CoreID）、修复年份（Restoration_year）、生境类型（Type）以及全岩芯有机碳储量（TotalCarbonCore，单位为Mg/ha）。 "沉积物与碳积累"——切片级放射性核素数据（样本量约547），包含位点（Site）、生境类型（Type）、岩芯ID（CoreID）、经压实校正的深度（Compaction_corrected_depth，单位为cm）、总²¹⁰Pb均值（Total 210Pb_mean）、总²¹⁰Pb标准差（Total 210Pb_sd）、²²⁶Ra均值（Ra-226_mean）、²²⁶Ra标准差（Ra-226_sd）、过剩²¹⁰Pb均值（Excess 210Pb_mean）以及过剩²¹⁰Pb标准差（Excess 210Pb_sd）。 "元数据"——所有变量的定义与单位说明，包括生境类型编码与测量单位。