Fig. 2From: Long-term effects of environmentally relevant concentrations of silver nanoparticles on major soil bacterial phyla of a loamy soilRelative variations of Acidobacteria, Actinobacteria, alpha-Proteobacteria, Bacteroidetes and beta-Proteobacteria compared to untreated control related to time at different Ag+ concentrations. a 0.01 mg Ag+ kg−1, b 0.10 mg Ag+ kg−1, c 1.00 mg Ag+ kg−1Back to article page