期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 557, 期 -, 页码 785-790出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2016.01.170
关键词
Wetland soil; Heavy metals; Soil physicochemical properties; Soil microbial biomass; Bacterial community structure
资金
- National Natural Science Foundation of China [51479072, 50808071, 51009063, 51378190, 51409100]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT-13R17]
- China Meteorological Data Sharing Service System
Heavy metals (HMs) contamination is a serious environmental issue in wetland soil. Understanding the micro ecological characteristic of HMs polluted wetland soil has become a public concern. The goal of this study was to identify the effects of HMs and soil physicochemical properties on soil microorganisms and prioritize some parameters that contributed significantly to soil microbial biomass (SMB) and bacterial community structure. Bacterial community structure was analyzed by polymerase chain reaction-denaturing gradient gel electrophoresis (PCR-DGGE). Relationships between soil environment and microorganisms were analyzed by correlation analysis and redundancy analysis (RDA). The result indicated relationship between SMB and HMs was weaker than SMB and physicochemical properties. The RDA showed all eight parameters explained 74.9% of the variation in the bacterial DGGE profiles. 43.4% (contain the variation shared by Cr, Cd, Pb and Cu) of the variation for bacteria was explained by the four kinds of HMs, demonstrating HMs contamination had a significant influence on the changes of bacterial community structure. Cr solely explained 19.4% (p < 0.05) of the variation for bacterial community structure, and Cd explained 17.5% (p < 0.05), indicating Cr and Cd were the major factors related to bacterial community structure changes. (C) 2016 Elsevier B.V. All rights reserved.
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