Pearson correlations (r) and Gaussian quadratic squared correlation coefficients (Gauss. r2(adj)) of diatom relative abundance versus measured physical parameters and chemical atmospheric deposition.

For this analysis diatom and environmental data were normalized by lake so that SDs ranged from 0 to 1. The top 25 taxon-stressor relationships are presented, sorted by smallest P value. N = number of observations in samples. A full list of the significant taxon-stressor relationships is in S2 Table.