Grazing and fertilization influence plant species richness via direct and indirect pathways in an alpine meadow of the eastern Tibetan Plateau

doi:10.1111/gfs.12232

NWIPB OpenIR

	Grazing and fertilization influence plant species richness via direct and indirect pathways in an alpine meadow of the eastern Tibetan Plateau
	Li, J.1; Zhang, C.2; Yang, Z.3; Guo, H.4; Zhou, X.1; Du, G.1
	2017-06-01
发表期刊	GRASS AND FORAGE SCIENCE
卷号	72 期号:2 页码:343-354
文章类型	Article
摘要	Grazing and fertilization influence plant species richness through multiple pathways, but the exact pathways and their relative contributions are unclear. Here, we report on a 3-year field experiment on an alpine meadow in which we manipulated grazing and fertilization simultaneously to assess their direct and indirect effects on plant species richness. Results indicated that both grazing and fertilization significantly influenced plant species richness via above- and belowground pathways. Specifically, the direct effect of grazing (-0.30, effect size) on species richness was negative, mainly due to selective feeding. This was comparable, in magnitude, to a positive indirect effect of grazing (0.36) on species richness, due to decreased aboveground biomass and increased belowground biomass. The direct effect of fertilization (-0.34) on species richness was negative, which was attributed to the changes of soil pH and available nitrogen; this effect was double the indirect effect (-0.16), which largely stemmed from the increased aboveground biomass rather than changes in belowground biomass. No significant interaction of grazing and fertilization on species richness was observed, but the effect of fertilization on species richness was masked by the effect of grazing in the combined treatment. It was concluded that moderate nitrogen addition (<51.0 kg N ha(-1) year(-1)) could increase local pasture productivity while also sustaining species richness stability.
关键词	Alpine Grassland Grazing Nitrogen Fertilizer Species Richness Structural Equation Modelling Tibet
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
DOI	10.1111/gfs.12232
关键词[WOS]	PERENNIAL GRASS MIXTURES ; DIVERSITY ; COMPETITION ; PRODUCTIVITY ; BIODIVERSITY ; REGION ; LIGHT ; COMMUNITIES ; NUTRIENTS ; ECOSYSTEM
收录类别	SCI
语种	英语
项目资助者	National Natural Science Foundation of China(41430749)
WOS研究方向	Agriculture
WOS类目	Agronomy
WOS记录号	WOS:000401854700014
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/7093
专题	中国科学院西北高原生物研究所
作者单位	1.Lanzhou Univ, Sch Life Sci, State Key Lab Grassland & Agroecosyst, Lanzhou 730000, Peoples R China 2.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining, Peoples R China 3.Henan Univ, Coll Life Sci, State Key Lab Cotton Biol, Key Lab Plant Stress Biol, Kaifeng, Peoples R China 4.Nanjing Agr Univ, Coll Resources & Environm Sci, Soil Ecol Lab, Nanjing, Jiangsu, Peoples R China
推荐引用方式 GB/T 7714	Li, J.,Zhang, C.,Yang, Z.,et al. Grazing and fertilization influence plant species richness via direct and indirect pathways in an alpine meadow of the eastern Tibetan Plateau[J]. GRASS AND FORAGE SCIENCE,2017,72(2):343-354.
APA	Li, J.,Zhang, C.,Yang, Z.,Guo, H.,Zhou, X.,&Du, G..(2017).Grazing and fertilization influence plant species richness via direct and indirect pathways in an alpine meadow of the eastern Tibetan Plateau.GRASS AND FORAGE SCIENCE,72(2),343-354.
MLA	Li, J.,et al."Grazing and fertilization influence plant species richness via direct and indirect pathways in an alpine meadow of the eastern Tibetan Plateau".GRASS AND FORAGE SCIENCE 72.2(2017):343-354.