标题：Using microbial community functioning as the complementary environmental condition indicator: a case study of an iron deposit tailing area.
作者：Wang QiAng;Wang RenQing;Tian ChengYu;Yu Yue;Zhang YongLi;Dai JiuLan
作者机构：Environment Research Institute, Shandong University, Ji’nan 250100, China;Ecology and Biodiversity Institute, College of Life Sc
来源：European Journal of Soil Biology
关键词：CLPP;Environmental assessment;Metals contamination;Iron tailing;Microbial ecology;Soil
摘要：Various indices of soil microbial community and physiochemical properties at an iron deposit tailing area were investigated to evaluate the use of microbial community behavior as a complemental indicator of soil condition to traditional quality indices. Besides basal respiration rate and microbial carbon, the BIOLOGReg. method was applied to estimate the microbial ability in utilizing different carbon sources. Ordination methods to obtain a biological characterization of sampling sites, and principal response curve methods to reveal the carbon utilizing ability during the whole cultivating process were utilized in this study. The Nemerow composite index, which was used to assess the heavy metal contamination based on six total metal contents, hardly detected the overall discrepancy. However, there were significant differences in microbial functioning parameters at the five sampling plots, which provided more information about the environmental condition. The increases of certain metal contents and pH were accompanied by higher basal respirations (BAS). The increase of BAS did not correspond with the increase of carbon utilization and the higher level of microbial carbon contents. On the whole, these findings indicated that microbes can provide complementary information about different degrees of contamination and can be regarded as a usefully environmental indicator.