Impacts of methamidophos,copper,and their combinations on bacterial community structure and function in black soil  

作　　者：ZHANG Huiwen ZHOU Qixing ZHANG Qianru ZHANG Chenggang 

机构地区：[1]Key Laboratory of Terrestrial Ecological Process,Institute of Applied Ecology,Chinese Academy of Science,Shenyang 110016,China

出　　处：《Science China(Life Sciences)》2005年第z1期14-25,共12页中国科学(生命科学英文版)

基　　金：This work was supported in part by the Knowledge Innovation Engineering Action,the Chinese Academy of Sciences(KZCX2-SW-416);the National Natural Science Foundation of China(Grant No.20225722).

摘　　要：The potential ecotoxicologial risks of methamidophos,copper,and their combinations on microbial community of black soil ecosystem in the Northeast China were assessed in species richness and structures by using 16S rDNA-PCR-DGGE analysis approach,and functional characteristics at community levels by using BIOLOG^(GN) system analysis method as well as two conventional methods(DHA and SIR).All results of DGGE banding fingerprint patterns(amplified by bacterial specific 16S rDNA V_(3) high variable region universal primer)indicated that the species richness of bacterial community in tested soil was significantly decreased to different extents by using different concentrations of single methamidophos,copper,especially some of their combinations had worse effects than their corresponding single factors.In addition,the structures of soil bacterial community had been disturbed under all stresses applied in this study because of the enrichment of some species and the disappearance of other species from the bacterial community.The effects of the single factors with lower concentrations on the communiy structure were weaker than those with higher concentrations.Moreover,the bacterial community structures under the combined stresses of methamidophos and copper were significantly different from those of control and their corresponding single factors.The change of DHA and carbon source substrate utilizing fingerprint patterns based on BIOLOG^(GN)system were two relatively sensitive directors corresponding to the stress presented in this study.Between methamodophos and copper,there happened the significant joint-toxic actions when they were used in combination on DHA and carbon source substrate utilizing fingerprint patterns of soil bacterial communities.The DHA of soil under the combined stresses was lower than that of the control and that under the single factors,and the BIOLOG^(GN) substrate utilizing patterns of soil treated by combinations were distinctively differentiated from the control and their corresponding single f

关 键 词：and their combinations on bacterial community structure and function in black soil Impacts of methamidophos COPPER 

分 类 号：N[自然科学总论]