期刊
SOIL BIOLOGY & BIOCHEMISTRY
卷 83, 期 -, 页码 52-56出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.soilbio.2015.01.007
关键词
Desert ecosystem; Microbial community composition; Precipitation increasing; Soil microbial biomass; Soil respiration
类别
资金
- West Light Foundation of the Chinese Academy of Sciences [RCPY201101]
- Chinese National Natural Scientific Foundation [31370010, 41371004]
Soil microbial communities play a critical role in soil carbon cycling and influence soil carbon-climate feedbacks. However, little information exists regarding the response of soil microbial communities in temperate desert ecosystems to projected increases in precipitation and the resulting effects on soil carbon emissions. A three-year precipitation addition experiment was conducted to explore the responses of soil respiration (R-s), microbial respiration (R-m) and microbial community composition to low (extra 15%) and medium (extra 30%) precipitation increases in a temperate desert ecosystem. R-s, R-m, microbial biomass carbon (MBC) and nitrogen (MBN), and microbial PLFAs consistently increased with increasing precipitation. R-s and R-m were positively correlated with MBC and microbial PLFAs. However, precipitation addition had no impacts on microbial community composition and fungal to bacterial PLFAs ratio. These results suggest that projected precipitation increase may synergistically increase bacterial and fungal abundance, and stimulation of microbial biomass can increase soil carbon release in desert ecosystems. (C) 2015 Elsevier Ltd. 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