期刊
ECOLOGICAL ENGINEERING
卷 57, 期 -, 页码 72-78出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ecoleng.2013.04.038
关键词
Dongting Lake; Yangtze River; Soil microbial biomass; Bacterial community structure; Dam; Carbon storage
资金
- National Natural Science Foundation of China [51039001, 51009063]
- State Council Three Gorges Project Construction Committee [SX2010-026]
- National Key Science and Technology Project for Water Environmental Pollution Control [2009ZX07212-001-06]
- Ministry of Education of China [NCET-08-0181]
In this study, we examined possible impacts of construction of similar to 50,000 dams throughout the Yangtze River watershed on the soil microbial biomass (SMB) and bacterial community structure in Dongting Lake which is the second largest fresh lake in China. Soil samples were collected from 16 study sites where the surface soil was deposited in early stage (before 1970s) or recently years. Soil properties, SMB and bacterial community structure were measured. Relationship between soil properties and bacterial community compositions was simultaneously evaluated by redundancy analysis (RDA). The results indicated that there were significant differences in soil texture and other soil properties between the early sedimentary soil samples and the recently sedimentary soil samples. As a representative for SMB, microbial biomass carbon (MBC) had a significant increase from 686 to 1324 mu g C/g soil. Bacterial community structure had an obvious change, and Shannon-Weiner diversity index had a significant increase from 2.39 to 2.92. Although causes for these changes could be multiple, these 50,000 dams would be the root causes as they decreased the grain-sizes of sediment, which affected soil properties, discharged into Dongting Lake. (C) 2013 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据