Soil microbial community composition and its driving factors in alpine grasslands along a mountain elevational gradient

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2016 > Vol13 No.6

	Soil microbial community composition and its driving factors in alpine grasslands along a mountain elevational gradient
	Cui Hai-jun; Wang Gen-xu; Yang Yan; Yang Yang; Chang Rui-ying; Ran Fei
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2016-06-01
卷号	13 期号:6 页码:1013-1023
关键词	Alpine grassland Elevational gradient Soil microbial community Phospholipid fatty acid Plant functional group Soil chemistry Variance partitioning
ISSN号	1672-6316
通讯作者	WANG Gen-xu
英文摘要	Understanding the vertical distribution patterns of soil microbial community and its driving factors in alpine grasslands in the humid regions of the Tibet Plateau might be of great significance for predicting the soil microbial community of this type of vegetation in response to environmental change. Using phospholipid fatty acids (PLFA), we investigated soil microbial community composition along an elevational gradient (3094 similar to 4131 m above sea level) on Mount Yajiageng, and we explored the impact of plant functional groups and soil chemistry on the soil microbial community. Except for Arbuscular Mycorrhizal fungi (AM fungi) biomarker 18:2 omega 6,9 increasing significantly, other biomarkers did not show a consistent trend with the elevational gradient. Microbial biomass quantified by total PLFAs did not show the elevational trend and had mean values ranging from 1.64 to 4.09 mu mol per g organic carbon (OC), which had the maximum value at the highest site. Bacterial PLFAs exhibited a similar trend with total PLFAs, and its mean values ranged from 0.82 to 1.81 mu mol (g OC)(-1). The bacterial to fungal biomass ratios had the minimum value at the highest site, which might be related to temperature and soil total nitrogen (TN). The ratios of Gram-negative to Gram-positive bacteria had a significantly negative correlation with soil TN and had the maximum value at the highest site. Leguminous plant coverage and soil TN explained 58% of the total variation in the soil microbial community and could achieve the same interpretation as the whole model. Other factors may influence the soil microbial community through interaction with leguminous plant coverage and soil TN. Soil chemistry and plant functional group composition in substantial amounts explained different parts of the variation within the soil microbial community, and the interaction between them had no impact on the soil microbial community maybe because long-term grazing greatly reduces litter. In sum, although there were obvious differences in soil microbial communities along the elevation gradient, there were no clear elevational trends found in general. Plant functional groups and soil chemistry respectively affect the different aspects of soil microbial community. Leguminous plant coverage and soil TN had important effects in shaping soil microbial community.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	PHOSPHOLIPID FATTY-ACID ; PLANT DIVERSITY ; BACTERIAL COMMUNITIES ; TIBETAN PLATEAU ; CLIMATE-CHANGE ; FOOD-WEB ; BIOMASS ; ECOSYSTEM ; FOREST ; CARBON
收录类别	SCI
语种	英语
WOS记录号	WOS:000379268300005
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/17216]
专题	成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.6 成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室
作者单位	Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Cui Hai-jun,Wang Gen-xu,Yang Yan,et al. Soil microbial community composition and its driving factors in alpine grasslands along a mountain elevational gradient[J]. JOURNAL OF MOUNTAIN SCIENCE,2016,13(6):1013-1023.
APA	Cui Hai-jun,Wang Gen-xu,Yang Yan,Yang Yang,Chang Rui-ying,&Ran Fei.(2016).Soil microbial community composition and its driving factors in alpine grasslands along a mountain elevational gradient.JOURNAL OF MOUNTAIN SCIENCE,13(6),1013-1023.
MLA	Cui Hai-jun,et al."Soil microbial community composition and its driving factors in alpine grasslands along a mountain elevational gradient".JOURNAL OF MOUNTAIN SCIENCE 13.6(2016):1013-1023.