Abstract
The goal of this work was to assess the effect of combined pollution of galaxolide (HHCB) and cadmium (Cd) on soil microbial community as measured by phospholipid fatty acid (PLFA). Combined effects of HHCB and Cd were different from that of HHCB alone. The total microbial biomass increased with the concentrations of HHCB in both the single and combined treatments. Comparing to the single HHCB treatments, addition of Cd significantly reduced both the total microbial biomass and Gram-positive/Gram-negative bacteria (G+/G-) ratio, while increased the bacteria/fungi (B/F) ratio in the combined pollution treatments. The principal component analysis (PCA) revealed that the microbial community structure was significantly altered by the combined effects of HHCB and Cd. Results of redundancy analysis (RDA) showed that there was complex relationship between pollutant and microbial community and the combined effects was higher than the single pollution. Taken together, these results suggest that combined pollution of HHCB and Cd caused a greater influence on the soil microbial community than the single pollution of HHCB.
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