气候变化领域集成服务门户(CCPortal): Microbial Nonlinear Response to a Precipitation Gradient in the Northeastern Tibetan Plateau

CCPortal

DOI	10.1080/01490451.2014.1001094
	Microbial Nonlinear Response to a Precipitation Gradient in the Northeastern Tibetan Plateau
	Si, Guicai; Lei, Tianzhu; Xia, Yanqin; Yuan, Yanli; Zhang, Gengxin
通讯作者	Zhang, GX (通讯作者)
发表日期	2016
ISSN	0149-0451
EISSN	1521-0529
起始页码	85
结束页码	97
卷号	33 期号:2
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.
关键词	FATTY-ACID PROFILES COMMUNITY STRUCTURE LITTER DECOMPOSITION GLOBAL PATTERNS SOIL DIVERSITY GRASSLAND TRANSECT MOISTURE BIOMASS
英文关键词	arid and semiarid areas; mean annual precipitation; microbial community; PLFA
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
WOS记录号	WOS:000374786000002
来源期刊	GEOMICROBIOLOGY JOURNAL
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/258636
推荐引用方式 GB/T 7714	Si, Guicai,Lei, Tianzhu,Xia, Yanqin,et al. Microbial Nonlinear Response to a Precipitation Gradient in the Northeastern Tibetan Plateau[J]. 中国科学院青藏高原研究所,2016,33(2).
APA	Si, Guicai,Lei, Tianzhu,Xia, Yanqin,Yuan, Yanli,&Zhang, Gengxin.(2016).Microbial Nonlinear Response to a Precipitation Gradient in the Northeastern Tibetan Plateau.GEOMICROBIOLOGY JOURNAL,33(2).
MLA	Si, Guicai,et al."Microbial Nonlinear Response to a Precipitation Gradient in the Northeastern Tibetan Plateau".GEOMICROBIOLOGY JOURNAL 33.2(2016).