Analysis of Ectomycorrhizal Fungal Diversity, Relative Abundance, and Community Data in Effaråsen Scots Pine Forests: Effects of Tree Retention Level, Tree Distance, and Size.

It includes three data files: (1) ECM2017.csv, the raw data, containing relative abundance data for ECM fungi across 245 soil samples with associated retention level categories; (2) stand_leveldata.csv, the aggregated data to the stand level, providing ecological data for the 25 forest stands ; and (3) tax_2017.csv, which lists species taxonomy, SCATA groups, genus, and functional group classifications for the species present in the study.

The data were processed using SCATA or standardized taxonomic grouping. An accompanying R script (R_code_clean.R) performs data cleaning, diversity estimation using iNEXT, multivariate ordination (NMDS), correlation analyses, and visualization. This script requires specific R packages listed in the R file, and assumes data files are stored in a relative ./data directory.