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学科主题: 生物科学::普通生物学
题名: Microbial Nonlinear Response to a Precipitation Gradient in the Northeastern Tibetan Plateau
作者: Si, GC (Si, Guicai)1, 2; Lei, TZ (Lei, Tianzhu)2; Xia, YQ (Xia, Yanqin)2; Yuan, YL (Yuan, Yanli)1; Zhang, GX (Zhang, Gengxin)1
通讯作者: Zhang, GX
刊名: GEOMICROBIOLOGY JOURNAL
发表日期: 2016
DOI: 10.1080/01490451.2014.1001094
卷: 33, 期:2, 页:85-97
收录类别: SCI
合作性质: 国内
文章类型: Article
英文摘要: The response of soil microbes to global warming, especially their response to precipitation, remains poorly known. The Tibetan Plateau is very sensitive to climate change. In particular, the northeastern margin of the Tibetan Plateau is an interesting area to test the response of soil microbial communities to precipitation, as there is a distinct gradient in annual precipitation from east to west. We collected soil samples along a precipitation gradient in arid and semi-arid areas of the northeastern Tibetan Plateau. Phospholipid fatty acid (PLFA) technology was used to analyze the microbial community structure and total microbial biomass. With declining precipitation, bacterial biomass decreased significantly, whereas fungal biomass did not show an obvious trend; this result indicates that bacteria are more sensitive to mean annual precipitation (MAP). Overall, the biomass of Gram-negative (G(-)) bacteria represented up to 82% of the total bacterial biomass. In the high (260-394 mm yr(-1)) MAP areas, bacterial biomass was mainly concentrated at the surface and decreased with increasing soil depth (0-40 cm). In contrast, in the low (36-260 mm yr(-1)) MAP areas, bacterial biomass was mainly concentrated in the deep soils. The mean annual precipitation was strongly correlated with soil microbial community in space, with microbial communities in the 0-10-cm soil depth most affected by precipitation. Groundwater may impact microbial communities in the 20-40-cm soil depth of this arid and semiarid region. The clustering of the microbial communities was significantly grouped according to the MAP gradient, revealing that MAP is a major driving force of microbial communities in this arid and semi-arid area. The decline in MAP led to a shift in the structure of the microbial community and an overall reduction in microbial biomass.
语种: 英语
WOS记录号: WOS:000374786000002
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.itpcas.ac.cn/handle/131C11/7869
Appears in Collections:图书馆_期刊论文

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作者单位: 1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Alpine Ecol & Biodivers, Beijing 100101, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, Gansu Prov Key Lab Petr Resources Res, Key Lab Petr Resources, Lanzhou, Peoples R China

Recommended Citation:
Si, GC ,Lei, TZ ,Xia, YQ ,et al. Microbial Nonlinear Response to a Precipitation Gradient in the Northeastern Tibetan Plateau[J]. GEOMICROBIOLOGY JOURNAL,2016,33(2):85-97.
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文件名: V.33(2) 85-97 2016.pdf
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