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Joint effects of galaxolide and cadmium on bacteria and fungi quantities in soil.

LU Ze1,2, HU Xiao-min1**, WEI Wei3, AN Jing2, JI Zhan-hua2   

  1. (1School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; 2Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China; 3 School of Municipal and Environmental Engineering, Shenyang Jianzhu University, Shenyang 110168, China)
  • Online:2014-08-10 Published:2014-08-10

Abstract: Single and joint effects of galaxolide (HHCB) and Cd on bacteria and fungi quantities in the soil incubated 10 weeks were investigated in the laboratory. The results showed that single and joint exposures of HHCB and Cd had significant impacts on bacteria and fungi quantities
(P<0.01), except for Cd on bacteria. The growth of bacteria was inhibited firstly but promoted later after the applications of 500, 1000 mg·kg-1 HHCB and 10 mg·kg-1 Cd singly and jointly. However, the single and joint exposures of 100, 500 mg·kg-1 HHCB and 10 mg·kg-1 Cd promoted the growth of fungi. With the increase of HHCB concentration, the rate of inhibition decreased for bacteria during the 5th to 10th week, while increased for fungi during the 1st to 10th week except for single HHCB in the 1st, 4th and 10th weeks as well as joint pollution in the 4th and 10th weeks. It was suggested that the joint effects of compound pollution were synergistic on bacteria in the 1st week, but antagonistic on fungi from the 7th to 8th week.

Key words: macroinvertebrate, ABC curve, Andrias davidianus, environmental factors, habitat evaluation