Aboveground community and species-specific plant biomass from the Jena Experiment (Main Experiment, year 2004)

This data set contains aboveground community biomass (Sown plant community, Weed plant community, Dead plant material, and Unidentified plant material; all measured in biomass as dry weight) and species-specific biomass from the sown species of the main experiment plots of a large grassland biodiversity experiment (the Jena Experiment; see further details below). In the main experiment, 82 grassland plots of 20 x 20 m were established from a pool of 60 species belonging to four functional groups (grasses, legumes, tall and small herbs). In May 2002, varying numbers of plant species from this species pool were sown into the plots to create a gradient of plant species richness (1, 2, 4, 8, 16 and 60 species) and functional richness (1, 2, 3, 4 functional groups). Plots were maintained by bi-annual weeding and mowing. […]本数据集包含地上群落生物量（包括播种植物群落、杂草植物群落、枯落植物残体以及未鉴定植物材料，所有生物量均以干重计量），以及大型草地生物多样性实验——耶拿实验（Jena Experiment）主实验样地中播种物种的物种特异性生物量（详见下文）。在主实验中，研究人员从隶属于4个功能群（禾草类、豆科类、高大草本与小型草本）的60个物种库中，建立了82块20×20米的草地样地。2002年5月，研究人员从该物种库中选取不同数量的植物物种播种至样地内，以构建植物物种丰富度（1、2、4、8、16和60种）与功能群丰富度（1、2、3、4个功能群）的梯度体系。所有样地均通过每年两次除草与刈割进行维护。[...]