A Compilation of Global Soil Microbial Biomass Carbon, Nitrogen, and Phosphorus Data

This data set provides the concentrations of soil microbial biomass carbon (C), nitrogen (N) and phosphorus (P), soil organic carbon, total nitrogen, and total phosphorus at biome and global scales. The data were compiled from a comprehensive survey of publications from the late 1970s to 2012 and include 3,422 data points from 315 papers. These data are from soil samples collected primarily at 0-15 cm depth with some from 0-30 cm. In addition, data were compiled for soil microbial biomass concentrations from soil profile samples to depths of 100 cm. Sampling site latitude and longitude were available for the majority of the samples that enabled assembling additional soil properties, site characteristics, vegetation distributions, biomes, and long-term climate data from several global sources of soil, land-cover, and climate data. These site attributes are included with the microbial biomass data. This data set contains two *.csv files of the soil microbial biomass C, N, P data. The first provides all compiled results emphasizing the full spatial extent of the data, while the second is a subset that provides only data from a series of profile samples emphasizing the vertical distribution of microbial biomass concentrations. There is a companion file, also in .csv format, of the references for the surveyed publications. A reference_number relates the data to the respective publication. The concentrations of soil microbial biomass, in combination with other soil databases, were used to estimate the global storage of soil microbial biomass C and N in 0-30 cm and 0-100 cm soil profiles. These storage estimates were combined with a spatial map of 12 major biomes (boreal forest, temperate coniferous forest, temperate broadleaf forest, tropical and subtropical forests, mixed forest, grassland, shrub, tundra, desert, natural wetland, cropland, and pasture) at 0.05-degree by 0.5-degree spatial resolution. The biome map and six estimates of C and N storage and C:N ration in soil microbial biomass are provided in a single netCDF format file.本数据集提供生物群区与全球尺度下的土壤微生物生物量碳（soil microbial biomass carbon, C）、氮（nitrogen, N）及磷（phosphorus, P）浓度，以及土壤有机碳、全氮与全磷含量。本数据集的数据整合自1970年代末至2012年的系统性文献调研，共计包含来自315篇学术论文的3422条数据记录。所用土样主要采集自0~15 cm土层，少量样品取自0~30 cm土层；此外，本数据集还整合了取自深度达100 cm的土壤剖面样品的微生物生物量浓度数据。 多数采样点均记录了经纬度坐标，可结合多个全球土壤、土地覆盖与气候数据集，补充获取额外土壤属性、站点特征、植被分布、生物群区类型及长期气候数据。上述站点属性已与微生物生物量数据一同整合至本数据集内。 本数据集包含两份土壤微生物生物量碳、氮、磷浓度的*.csv格式文件：第一份收录全部整合数据，完整呈现数据集的空间覆盖范围；第二份为子集文件，仅包含系列土壤剖面采样数据，重点展示微生物生物量浓度的垂直分布特征。 本数据集配套提供一份*.csv格式的调研文献参考文献表，其中的参考文献编号（reference_number）可将每条数据对应至其来源学术论文。 研究人员结合本数据集与其他土壤数据库，估算了0~30 cm及0~100 cm土壤剖面中全球土壤微生物生物量碳与氮的储量。该储量估算结果与12种主要生物群区的0.05°×0.5°空间分辨率分布图相结合，这12种生物群区包括寒温带针叶林、温带针叶林、温带阔叶林、热带与亚热带森林、混交林、草原、灌丛、苔原、荒漠、天然湿地、农田与牧场。生物群区分布图、6组土壤微生物生物量碳与氮储量估算结果，以及土壤微生物生物量碳氮比数据，均整合于单个netCDF格式文件中。