Fig. 1

The relative abundance of bacteria in soils with low (A), moderate (B), and high (C) nutrient levels with different nitrogen deposition levels, and with different nutrient levels under no (D), low (E), and high (F) nitrogen deposition levels. LpLL, LpML, and LpHL in (A) indicate the treatments with low soil nutrient levels under no, low, and high nitrogen deposition levels, respectively. LpLM, LpMM, and LpHM in (B) indicate the treatments with moderate soil nitrogen levels under no, low, and high nitrogen deposition levels, respectively. LpLH, LpMH, and LpHH in (C) indicate the treatments with high soil nitrogen levels under no, low, and high nitrogen deposition levels, respectively. LpLL, LpLM, and LpLH in (D) indicate the treatments with no nitrogen deposition and with low, moderate, and high nutrient levels, respectively. LpML, LpMM, and LpMH in (E) indicate the treatments with low nitrogen deposition and low, moderate, and high nutrient levels, respectively. LpHL, LpHM, and LpHH in (F) indicate the treatments with high nitrogen deposition and low, moderate, and high nutrient levels, respectively.