Ectomycorrhizal fungi are more sensitive to high soil nitrogen levels in forests exposed to nitrogen deposition

Ectomycorrhizal fungi are essential for nitrogen cycling in many temperate forests and responsive to anthropogenic nitrogen addition, which generally, decreases host carbon allocation to the fungi. In the boreal region, however, ectomycorrhizal fungal biomass has been found to correlate positively with soil nitrogen availability. Still, responses to anthropogenic input, for instance through atmospheric deposition, are commonly negative.
To elucidate whether variation in nitrogen supply affects ectomycorrhizal fungi differently depending on geographical context, we investigated ectomycorrhizal fungal communities along two fertility gradients across nemo-boreal forests with similar ranges in soil N/C ratios and inorganic nitrogen availability but located in regions with contrasting rates of nitrogen deposition.
Ectomycorrhizal biomass and community composition remained relatively stable across the nitrogen-gradient with low atmospheric nitrogen deposition, but biomass decreased, and the c..., , , Data belonging to:
\"Ectomycorrhizal fungi are more sensitive to high soil nitrogen levels in forests exposed to nitrogen deposition\" by Jörgensen K., Clemmensen K., Wallander H., Lindahl BD. in New Phytologist

*Important note about .csv files*\
all .csv files use \",\" and \";\" delimiters which would limit re-use if not accounted for. The accompanying code on Zenodo does account for the formatting of the files.

Description of column headings in the data sets:

File: ECM_counts.csv

Column name Description
sample_ID unique sample sample ID
tot_count total number of sequence counts
Columns C:LG Sequence counts of fungal clusters obtained by single linkage clustering with bioinformatics pipeline SCATA.

File: env_data.csv

Column name Description
site_ID Site ID
Region Levels: 2 (S = nemoral, U = boreal)
NH4_gOM continuous, mg ammonium-N per g organic matter
NO3_gOM continuous, mg nitrate-N per g organic matter
pH continuous, soil pH
NAG_OM continuous, N-acetylglucosaminidase activit...