Global dataset of plant diversity and the spatial variability of grassland biomass from NutNet

While there is strong evidence of diversity effects on temporal variability of productivity, whether this mechanism extends to variability across space remains elusive. Here, we present data from Nutrien Network (www.nutnet.org) that were used to determine the relationship between diferent scales of plant diversity and spatial variability of productivity in 83 grasslands worldwide, and to quantify the effect of experimentally increased spatial heterogeneity in environmental conditions on this relationship. There are two data sets, one for the pre-treatment (observational_data.csv) data, and other for the experimentally increased heterogeneity (increased heterogeneity.csv). In these data sets, study sites contained at least three replicates that originated from blocks each composed of ten 5 m × 5 m plots. In addition, pre-treatment data has a subset of sites in where soil conditions where measured (observational_data_soil.csv) and a version in which data for each site are sumarized and site-level climatic variables obtained from WorldClim (www.worldclim.org) are added. (observational_data_site_climate.csv). If you need any clarification or further information, please contact us.

尽管已有大量证据表明生物多样性对生产力的时间动态变异存在显著影响，但该效应机制是否同样适用于空间尺度上的变异，目前仍尚不明确。本研究公开了来自营养物网络（Nutrien Network，www.nutnet.org）的数据集，该数据集用于探究全球83个草原生态系统中，不同尺度的植物多样性与生产力空间变异之间的关联，并量化实验性增强的环境空间异质性对该关联的调控作用。本数据集包含两个子数据集：其一为预处理前的观测数据（observational_data.csv），其二为实验增强空间异质性后的数据集（increased heterogeneity.csv）。在上述数据集中，每个研究样地均包含至少3次重复样本，这些重复样本来自样方块，每个样方块由10个5米×5米的样方组成。此外，预处理数据集包含两个衍生子集：其一为测定了土壤条件的样地点子集（observational_data_soil.csv）；其二为对各站点数据进行汇总，并添加了从WorldClim（www.worldclim.org）获取的站点尺度气候变量的版本（observational_data_site_climate.csv）。若需任何说明或进一步的信息，请与我们联系。