Table 1: Summary of responses and vulnerability to N and S deposition.

Shown are the number of species out of the 198 with robust results for N or S that monotonically decreased, showed no response, monotonically increased, or had a unimodal relationship (N only) with N or S deposition. Shadings represent qualitative levels of vulnerability: high (red - decrease with both), moderate (orange - decrease with one and unaffected by the other), conditional (yellow - either contrasting relationships or conditional on the rate of deposition), or neutral (grey - no relationship with either). Species that partially benefit (light green - increase with one and unaffected by the other), or strongly benefit (dark green, increase with both) are also indicated. Species with “U-shaped” N relationships (45 species) are omitted as not ecologically realistic, and species names in each category are in Supplemental Table S1 and S2.

		S relationship
		Decrease	None	Increase	Total
N relationship	Decrease	11 (6%)	5 (3%)	14 (7%)	30 (15%)
	None	5 (3%)	15 (8%)	1 (1%)	21 (11%)
	Increase	26 (13%)	6 (3%)	8 (4%)	40 (20%)
	Unimodal	81 (41%)	6 (3%)	20 (10%)	107 (54%)
	Total	123 (62%)	32 (16%)	43 (22%)	198 (100%)