Plant biomass determination and stability metrics calculations analysed during the Jena Expermint from 2012 to 2015

The present study was conducted at the Jena Experiment field site from 2011 to 2015. The 48 experimental plant communities included twelve monocultures (of which one was removed from all analyses because it was planted with the wrong species), twelve 2-species mixtures, twelve 4-species mixtures and twelve 8-species mixtures. We used two community-evolution treatments (plant histories); plants with eight years of co-selection history in different plant communities in the Jena Experiment (communities of co-selected plants) and plants without such co-selection history (naïve communities). Community-level plant productivity was measured each year from 2012 to 2015 by collecting species-specific aboveground biomass twice per year in May and August. There are a total of seven harvests included in this dataset. We harvested plant material 3 cm aboveground from a 50 x 20 cm area in the centre of each half-quadrat, sorted it into species, dried it at 70°C and weighed the dry biomass. […]

本研究于2011年至2015年在耶拿实验场地进行。包含48个实验性植物群落，其中包括12个单一种植（其中一种因种植错误物种而被排除在所有分析之外），12个双物种混合群落，12个四物种混合群落以及12个八物种混合群落。本研究采用了两种群落演化处理（植物历史）；具有八年不同植物群落共选择历史的耶拿实验中的植物（共选择植物群落）以及缺乏此类共选择历史的植物（原生群落）。从2012年至2015年，每年均对群落层面的植物生产力进行测量，通过每年两次（五月份和八月份）收集特定物种的地上生物量来实现。该数据集包含总共七次收获。我们从每个半样方中央的50 x 20 cm区域内采集3 cm以上的植物材料，按物种分类，在70°C下烘干并称量干生物量。