Datasets of 30 freshwater lakes including macroinvertebrate data and explanatory data

# Datasets of 30 freshwater lakes including macroinvertebrate data and explanatory data [https://doi.org/10.5061/dryad.qrfj6q5nh](https://doi.org/10.5061/dryad.qrfj6q5nh) In order to examine how anthropogenic eutrophication modified the relationships between three facets (taxonomic, functional, and phylogenetic) of macroinvertebrate beta diversity and geographic and environmental distances across 30 freshwater lakes, we need to obtain basic macroinvertebrate data from 30 freshwater lakes. ## Description of the data and file structure The datasets include macroinvertebrate data and explanatory data in the 30 freshwater lakes. We uploaded a total of 5 datasets. The file "env" contains the environmental data of 30 freshwater lakes, the first column is the name of the lake, and the first row is the environmental factor. The column "area" refers to "lake area" in km². The column "depth" refers to "water depth" in m. The units of total nitrogen (TN), nitrate nitrogen (NO3-N), ammonium nitrogen (NH4-N), total phosphorus (TP), PO4-P, and chemical oxygen demand (CODMn) are "mg/L". The unit of chlorophyll a (Chl a) is "μg/L". The unit of conductivity is "μs/cm". The unit of transparency is "cm". The unit of vegetation coverage is "%". More details can be found in the related article, especially material methods and Table 2. The file "pcnm" is the principal coordinates of neighbour matrix data based on the spatial distances of 30 lakes. The file "species" is the density data of macroinvertebrates in 30 lakes. The file "taxon" is the taxon data of macroinvertebrates. The file "trait" is the functional traits of macroinvertebrates. ## Sharing/Access information The data can only be accessed here. ## Code/Software All analyses of this study were carried out in R.