Regional-scale patterns of soil microbes and nematodes across grasslands on the Mongolian plateau: relationships with climate, soil, and plants

doi:10.1111/ecog.01226

	Regional-scale patterns of soil microbes and nematodes across grasslands on the Mongolian plateau: relationships with climate, soil, and plants
	Chen, Dima ; Cheng, Junhui ; Chu, Pengfei ; Hu, Shuijin 1; Xie, Yichun 2; Tuvshintogtokh, Indree 3; Bai, Yongfei
	2015
发表期刊	ECOGRAPHY
ISSN	0906-7590
卷号	38 期号:6 页码:622-631
摘要	Belowground communities exert major controls over the carbon and nitrogen balances of terrestrial ecosystems by regulating decomposition and nutrient availability for plants. Yet little is known about the patterns of belowground communities and their relationships with environmental factors, particularly at the regional scale where multiple environmental gradients co-vary. Here, we describe the patterns of belowground communities (microbes and nematodes) and their relationships with environmental factors based on two parallel studies: a field survey with two regional-scale transects across the Mongolia plateau and a water-addition experiment in a typical steppe. In the field survey, soils and plants were collected across two large-scale transects (a 2000-km east-west transect and a 900-km south-north transect). At the regional-scale, the variations in soil microbes (e.g. bacterial PLFA, fungal PLFA, and F/B ratio) were mainly explained by precipitation and soil factors. In contrast, the variation in soil nematodes (e.g. density of trophic groups and the bacterial-feeding/fungal-feeding nematode ratio) were primarily explained by precipitation. These variations of microbe or nematode variables explained by environmental factors at regional scale were derived from different vegetation types. Along the gradient from nutrient-poor to nutrient-rich vegetation types, the total variation in soil microbes explained by precipitation increased and that explained by plant and soil decreased, while the opposite was true for soil nematodes. Experimental water addition, which increased rainfall by 30% during the growing season, increased biomass or density of belowground communities, with the nematodes being more responsive than the microbes. The different responses of soil microbial and nematode communities to environmental gradients at the regional scale likely reflect their different adaptations to climate, soil nutrients, and plants. Our findings suggest that the soil nematode and microbial communities are strongly controlled by bottom-up effects of precipitation alone or in combination with soil conditions.
学科领域	Biodiversity Conservation ; Ecology
DOI	10.1111/ecog.01226
收录类别	SCI
语种	英语
WOS关键词	COMMUNITY STRUCTURE ; LAND-USE ; FUNGAL COMMUNITIES ; WATER AVAILABILITY ; PH GRADIENT ; BOTTOM-UP ; FOOD-WEB ; DIVERSITY ; BACTERIAL ; PRODUCTIVITY
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
WOS记录号	WOS:000355684500008
出版者	WILEY
文献子类	Article
出版地	HOBOKEN
EISSN	1600-0587
资助机构	Natural Science Foundation of China [31030013, 31320103916, 31100335] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDA05050400] ; Knowledge Innovation Project of the Chinese Academy of Sciences [KSCX2-EW-Z-5]
作者邮箱	yfbai@ibcas.ac.cn
引用统计	被引频次：59[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/25859
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.N Carolina State Univ, Dept Plant Pathol, Raleigh, NC 27695 USA 3.Eastern Michigan Univ, Dept Geog & Geol, Ypsilanti, MI 48197 USA 4.Mongolian Acad Sci, Inst Bot, Dept Vegetat Ecol, Ulaanbaatar, Mongolia
推荐引用方式 GB/T 7714	Chen, Dima,Cheng, Junhui,Chu, Pengfei,et al. Regional-scale patterns of soil microbes and nematodes across grasslands on the Mongolian plateau: relationships with climate, soil, and plants[J]. ECOGRAPHY,2015,38(6):622-631.
APA	Chen, Dima.,Cheng, Junhui.,Chu, Pengfei.,Hu, Shuijin.,Xie, Yichun.,...&Bai, Yongfei.(2015).Regional-scale patterns of soil microbes and nematodes across grasslands on the Mongolian plateau: relationships with climate, soil, and plants.ECOGRAPHY,38(6),622-631.
MLA	Chen, Dima,et al."Regional-scale patterns of soil microbes and nematodes across grasslands on the Mongolian plateau: relationships with climate, soil, and plants".ECOGRAPHY 38.6(2015):622-631.

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