%0 Dataset %T Functional diversity response to geographic and experimental precipitation gradients varies with plant community type %J National Cryosphere Desert Data Center %I National Cryosphere Desert Data Center(www.ncdc.ac.cn) %U http://www.ncdc.ac.cn/portal/metadata/9f1d4911-b446-4cda-9902-67f37e4454d0 %W NCDC %R 10.5061/dryad.r7sqv9sc2 %A None %A None %A None %K Functional richness (FRic);dispersion (FDis);functional Diversity index %X The dataset was collected form a comparative study of how precipitation changes along the natural and experimental gradients affect different components of functional diversity in desert-shrub and steppe-grass communities. The trait data on CWM were calculated by multiplying the trait value of each species by its relative biomass in the community. FDvar were calculated form the variation in single-trait value weighted by the abundance of each species in plant community. Functional richness (FRic) and dispersion (FDis) were calculated form log-transformed values of six single traits. Functional diversity indices of CWM, FDvar, FRic and FDis were calculated by the FDiversity and R package.We used the simple linear regression to explore the associations of functional diversity components with precipitation changes along the natural gradient. The linear mixed models with block included as a random effect were used to examine the associations of functional diversity components with precipitation changes in experiment. The grass and shrub communities were analysed separately along the natural gradient or in experiment. For the natural gradient, precipitation amount was mean annual value from 2000 to 2017 from the weather station near to each field site. . For the experimental gradient, precipitation amount was calculated as the per cent increases or decreases from the mean annual precipitation from 2015 to 2017 for the site.