Effects of Cadmium and Mercury alone and in Combination on the Soil Microbial Community Structural Diversity
To assess effects of cadmium (Cd) and mercury (Hg) alone and in combination on soil microbial community structural diversity, an incubation experiment was conducted, employing two soils, namely, the marine sediment silty loam soil and the yellowish red soil, in which five levels of Cd, Hg or Cd and Hg in combination were added. After incubated 56 days, phospholipid fatty acids (PLFAs) were tested. The results showed that the composition of the microbial communities changed significantly after different levels of metals application. The principal component analysis (PCA) of PLFAs indicated the structure of the microbial community was also significantly influenced by the pollution of metals, with the increases in PLFAs biomarkers for fungi and actinomycetes, and the increases in the ratio of Gram-positive to Gram-negative bacteria. By comparing the effects of Cd, Hg alone and in combination, the results revealed that the combined pollution of Cd and Hg had higher toxicity to soil microbial community structural diversity than that of Cd or Hg applied alone.
Soil microbial community structural diversity Cadmium Mercury
Min Liao Haijun Zhang Shouna Yu Chengli Chen Changyong Huang
Zhejiang Provincial Key Laboratory of Subtropical Soil and Plant Nutrition,College of Environmental and Natural Resource Sciences,Zhejiang University,Hangzhou 310029,China
国际会议
杭州
英文
337-341
2009-10-10（万方平台首次上网日期，不代表论文的发表时间）