气候变化领域集成服务门户(CCPortal): Effects of microclimate on soil bacterial communities across two contrasting timberline ecotones in southeast Tibet

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DOI	10.1111/ejss.12292
	Effects of microclimate on soil bacterial communities across two contrasting timberline ecotones in southeast Tibet
	Yuan, Y. L.; Si, G. C.; Wang, J.; Han, C. H.; Zhang, G. X.
通讯作者	Zhang, GX (通讯作者)
发表日期	2015
ISSN	1351-0754
EISSN	1365-2389
起始页码	1033
结束页码	1043
卷号	66 期号:6
英文摘要	The Sergyemla Mountains have unique timberline patterns. Abies georgei var. smithii (Viguie & Gaussen) and Juniperus saltuaria (Rehder & E. H. Wilson) dominate the north-facing and south-facing slopes of a U-shaped valley, respectively. Although these two timberlines represent the world's highest natural tree lines, little is known about the structure of their soil bacterial communities and the factors that control them. To characterize and compare the soil bacterial communities of two timberline ecotones with different spatial orientations, we investigated their structures by terminal restriction fragment length polymorphism analysis and sequencing methods. We found that the structures of the soil bacterial communities differed significantly between the two opposite slopes, and the difference between the bacterial communities correlated primarily with soil carbon:nitrogen ratios. This probably relates to differences in the microclimate (mean soil temperature) between the two aspects in the world's highest timberline ecotones. In addition, the structures of soil bacterial communities also differed significantly with soil depth, and total nitrogen content had the greatest effect on the bacterial communities. In this region, soil temperature rather than mean annual precipitation has a major effect on the structures of soil bacterial communities. Microclimate differences (mainly differences in soil temperature) between the two opposite slopes might indicate that an amplitude increase of 2 degrees C in soil temperature could change the structures of soil bacterial communities by changing the status of soil carbon and nitrogen in these timberline ecotones.
关键词	SERGYEMLA MOUNTAINS DIVERSITY DEPTH TEMPERATURE PREDICTORS LANDSCAPE RESPONSES ARCHAEAL LITTER
语种	英语
WOS研究方向	Agriculture
WOS类目	Soil Science
WOS记录号	WOS:000364312500008
来源期刊	EUROPEAN JOURNAL OF SOIL SCIENCE
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/258473
推荐引用方式 GB/T 7714	Yuan, Y. L.,Si, G. C.,Wang, J.,et al. Effects of microclimate on soil bacterial communities across two contrasting timberline ecotones in southeast Tibet[J]. 中国科学院青藏高原研究所,2015,66(6).
APA	Yuan, Y. L.,Si, G. C.,Wang, J.,Han, C. H.,&Zhang, G. X..(2015).Effects of microclimate on soil bacterial communities across two contrasting timberline ecotones in southeast Tibet.EUROPEAN JOURNAL OF SOIL SCIENCE,66(6).
MLA	Yuan, Y. L.,et al."Effects of microclimate on soil bacterial communities across two contrasting timberline ecotones in southeast Tibet".EUROPEAN JOURNAL OF SOIL SCIENCE 66.6(2015).