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gcb12440-sup-0001-TableS1.txtplain text document63K

Table S1. Results of Generalized Linear Mixed Model analysis for forest floor plant species. Only those species are listed that showed a different temporal trend of their cover in the study sites (random effect AIC > 10). The total change of a species at a study site is given as the site-specific effect (the sum of the fixed and the respective random effect). Nitrogen Critical Load exceedance (ExCLempN) and Ellenberg indicator values for nutrients (N), soil acidity (R), light (L), moisture (M) and temperature (T) are shown (0 indicates indifferent species). Species with low (1–3) and high indicator values (7–9) were grouped. As an example, species with low Ellenberg values 1–3 are bound to nutrient-poor sites (oligotrophic species); species with N values 7–9 prefer nutrient-rich sites (eutrophic species). ExCLempN is the difference between the canopy throughfall N deposition and the minimum empirical CL for nitrogen (negative values indicate no exceedance).

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Figure S1. Relationships between the site-specific trend of the cover of oligotrophic plant species and the CL exceedance (ExCLempN). All plant species with an Ellenberg N value < 4 are shown that occurred in more than five study sites and had a significant random effect (AIC > 10). ExCLempN is the difference between the canopy throughfall N deposition and the minimum empirical CL for nitrogen (negative values indicate no exceedance). The site-specific trend of plant species cover was derived from a GLMM (the sum of fixed and random effect). R² of a least square regression and the P-value of the slope (t-test statistic) are given in the upper right corner of the plot (see SOM Table 1 for full species names).

gcb12440-sup-0003-FigS1b.jpgimage/jpg222K 

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