Effects of plant functional group loss on soil biota and net ecosystem exchange: a plant removal experiment in the Mongolian grassland

doi:10.1111/1365-2745.12541

CORC > 植物研究所 > 中国科学院植物研究所 > 植被与环境变化国家重点实验室

	Effects of plant functional group loss on soil biota and net ecosystem exchange: a plant removal experiment in the Mongolian grassland
	Chen, Dima ; Pan, Qingmin ; Bai, Yongfei ; Hu, Shuijin 2; Huang, Jianhui ; Wang, Qibing ; Naeem, Shahid 3; Elser, James J.; Wu, Jianguo 4; Han, Xingguo
刊名	JOURNAL OF ECOLOGY
	2016
卷号	104 期号:3 页码:734-743
关键词	biodiversity loss compensatory effect mass ratio hypothesis plant functional group plant-soil (below-ground) interactions soil C sequestration soil food web soil microbes soil nematodes trophic levels
ISSN号	0022-0477
DOI	10.1111/1365-2745.12541
文献子类	Article
英文摘要	1. The rapid loss of global biodiversity can greatly affect the functioning of above-ground components of ecosystems. However, how such biodiversity losses affect below-ground communities and linkages to soil carbon (C) sequestration is unclear. Here, we describe how losses in plant functional groups (PFGs) affect soil microbial and nematode communities and net ecosystem exchange (NEE) in a 4-year removal experiment conducted on the Mongolian plateau, the world's largest remaining natural grassland. 2. Our results demonstrated that the biomasses or abundances of most components of the two below-ground communities (microbes and nematodes) were negatively affected by PFG loss and were positively related to above-ground plant biomass. The removal of dominant PFGs (perennial bunchgrasses and perennial rhizomatous grasses) reduced the biomass or abundance of belowground community components while removal of less dominant PFGs (perennial forbs and annuals/biennials) did not change or increased the biomass or abundance of below-ground community components. 3. The biomass-based ratio of fungal to bacterial microbes and the number-based ratio of fungal-feeding to bacterial-feeding nematodes decreased with increasing PFG losses. Variation partitioning analyses showed that the identity of PFGs together with above-ground plant biomass explained most of the total variation in soil microbes and that the identity of PFGs and above-ground plant biomass together with nematode food resources explained most of the total variation in soil nematodes. The increase in NEE with PFG loss was mainly explained by decreases in above-ground plant biomass and the ratio of fungi to bacteria. 4. Synthesis. The shift of below-ground communities from a fungal-based to a bacterial-based energy channel as PFG richness decreases indicates that less diverse grassland ecosystems will have lower nutrient retention and hence be more sensitive to land-use or climate change. The dominant effects of above-ground plant biomass and below-ground communities on NEE indicate that PFG loss resulting from land-use or climate change has the potential to reduce C sequestration in semiarid grassland soils. These findings suggest that predictive models may need to consider the composition of above-ground and below-ground communities in order to accurately simulate the dynamics of CO2 fluxes in terrestrial ecosystems.
学科主题	Plant Sciences ; Ecology
电子版国际标准刊号	1365-2745
出版地	HOBOKEN
WOS关键词	MICROBIAL COMMUNITIES ; SEMIARID STEPPE ; CARBON SEQUESTRATION ; DIVERSITY GRADIENT ; FOOD-WEB ; BIODIVERSITY ; LINKAGES ; BIOMASS ; MICROORGANISMS ; PRODUCTIVITY
WOS研究方向	Science Citation Index Expanded (SCI-EXPANDED)
语种	英语
出版者	WILEY
WOS记录号	WOS:000379014900012
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31320103916, 31570450, 31030013] ; Strategic Priority Research Program of the Chinese Academy of SciencesChinese Academy of Sciences [XDA05050400] ; US National Science FoundationNational Science Foundation (NSF) [DEB-0618193] ; Youth Innovation Promotion Association of the Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.ibcas.ac.cn/handle/2S10CLM1/25230]
专题	植被与环境变化国家重点实验室
作者单位	1.Arizona State Univ, Sch Life Sci, Tempe, AZ 85287 USA 2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 3.North Carolina State Univ, Dept Plant Pathol, Raleigh, NC 27695 USA 4.Columbia Univ, Dept Ecol Evolut & Environm Biol, 1200 Amsterdam Ave, New York, NY 10027 USA
推荐引用方式 GB/T 7714	Chen, Dima,Pan, Qingmin,Bai, Yongfei,et al. Effects of plant functional group loss on soil biota and net ecosystem exchange: a plant removal experiment in the Mongolian grassland[J]. JOURNAL OF ECOLOGY,2016,104(3):734-743.
APA	Chen, Dima.,Pan, Qingmin.,Bai, Yongfei.,Hu, Shuijin.,Huang, Jianhui.,...&Han, Xingguo.(2016).Effects of plant functional group loss on soil biota and net ecosystem exchange: a plant removal experiment in the Mongolian grassland.JOURNAL OF ECOLOGY,104(3),734-743.
MLA	Chen, Dima,et al."Effects of plant functional group loss on soil biota and net ecosystem exchange: a plant removal experiment in the Mongolian grassland".JOURNAL OF ECOLOGY 104.3(2016):734-743.