A global assessment of mangrove soil organic carbon sources and implications for blue carbon credit

This is the source data of research entitled 'A global assessment of mangrove soil organic carbon sources and implications for blue carbon credit'. This source data contains isotope (δ13C, δ15N) and N/C values of global mangrove sediments from the Web of Science using combinations of keywords “mangrove C* source”, “mangrove isotope”, “mangrove source”, utilizing 100 studies and 441 observations. The database should meet the following requirements: (1) parameters that used to calculate the OC sources should be reported (either δ13C and N/C or δ13C and δ15N); (2) the work must have been published in peer-reviewed publications; (3) the study must have been a field study in natural conditions without artificial manipulation. Besides, from the literature, we collected isotope and N/C values for mangrove tissues, riverine POM, phytoplankton, and microalgae to generate mangrove, terrestrial and marine endmembers. Phytoplankton and macroalgae were combined as a single OC source since their published δ13C or δ15N and N/C were largely overlapped. This dataset is used in mangrove OC source identification using two-tracer stable isotope analysis in R (MixSIAR), one of the more modern Bayesian mixing models.

本数据集为研究《全球红树林土壤有机碳来源评估及其对蓝色碳信用（blue carbon credit）的启示》的源数据。本数据集通过在Web of Science数据库中组合关键词“mangrove C* source”、“mangrove isotope”、“mangrove source”开展文献检索，共纳入100项研究与441组观测数据，涵盖全球红树林沉积物的同位素（δ13C、δ15N）及N/C比值信息。该数据库需满足以下三项要求：(1) 需报告用于计算有机碳（OC）来源的相关参数，即δ13C与N/C，或δ13C与δ15N；(2) 研究需发表于同行评议学术期刊；(3) 研究必须为自然条件下的野外实地研究，未施加人工干预。此外，本研究从相关文献中提取了红树林组织、河流颗粒有机质（Particulate Organic Matter, POM）、浮游植物及微藻的同位素与N/C比值数据，用于构建红树林端元、陆地端元与海洋端元。鉴于已发表的浮游植物与大型藻类的δ13C、δ15N及N/C比值存在大量重叠，故将二者合并为单一有机碳来源。本数据集被应用于基于R语言的双示踪稳定同位素分析工具MixSIAR的红树林有机碳来源识别研究，该工具是当前主流的贝叶斯混合模型之一。