Data for Change in functional trait diversity mediates the effects of nutrient addition on grassland stability

The files contain data from ten long-term NutNet (ranging from 10 to 15 years). That is, year 1 to year 15 cover and biomass data under ambient and nutrient addition (by NPK) conditions. The files also contain species-level leaf traits, that is, leaf C, leaf N, leaf P, leaf K, SLA, and the integrated trait (slow-fast leaf economic spectrum) based on 102 plant species under ambient and nutrient addition conditions at 10 NutNet sites. Furthermore, growing season at these 10 NutNet sites are included. Precipitation and potential evapotranspiration used to calculate the standardized precipitation–evapotranspiration index (SPEI) were downloaded from https://crudata.uea.ac.uk/cru/data/hrg/cru_ts_4.07/.