Relationship of plant diversity with litter and soil available nitrogen in an alpine meadow under a 9-year grazing exclusion

doi:10.1007/s11284-016-1394-3

NWIPB OpenIR

	Relationship of plant diversity with litter and soil available nitrogen in an alpine meadow under a 9-year grazing exclusion
	Zou, Jingru 1,3; Luo, Caiyun 1; Xu, Xingliang 2; Zhao, Na 1; Zhao, Liang 1; Zhao, Xinquan 1
	2016-11-01
发表期刊	ECOLOGICAL RESEARCH
卷号	31 期号:6 页码:841-851
文章类型	Article
摘要	Grazing exclusion is widely used globally to restore degraded grasslands. Plant diversity has important impacts on grassland ecosystem functions, including grassland productivity and carbon storage. In this study, we selected a Kobresia meadow on the Qinghai-Tibetan Plateau to investigate how grazing exclusion affects plant diversity. Inorganic nitrogen (NH4 (+) and NO3 (-)) was also measured because its availability impacts plant growth. We found that plant diversity in the meadow was significantly lower under grazing exclusion (fenced meadow) for 9 years compared with moderate grazing. Accumulated litter was significantly higher under grazing exclusion (386.41 g m(-2)) compared with grazing (58.77 g m(-2)). Soil inorganic nitrogen at 0-5 cm depth was significantly higher under grazing exclusion (13.60 x 10(-2) g kg(-1)) than under grazing (9.40 x 10(-2) g kg(-1)). The composition of the four functional groups (grasses, sedges, legumes, and forbs) might alter in response to significant changes in the amount of litter and soil available nitrogen content under grazing exclusion compared with grazing. However, the enhanced soil available nitrogen content showed weak feedbacks on plant diversity. In conclusion, light limitation induced by increased amounts of litter may be the main factor causing decreased plant diversity in grazing-excluded meadows compared with moderately grazed meadows.
关键词	Fence Functional Groups Grassland Light Limitation Vegetation
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
DOI	10.1007/s11284-016-1394-3
关键词[WOS]	QINGHAI-TIBET PLATEAU ; LIVESTOCK EXCLOSURE ; GRASSLAND DIVERSITY ; SPECIES-DIVERSITY ; TALLGRASS PRAIRIE ; ELEVATED CO2 ; PRODUCTIVITY ; BIODIVERSITY ; CARBON ; COMMUNITY
收录类别	SCI
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:000387344900009
引用统计	被引频次：21[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/363003/6671
专题	中国科学院西北高原生物研究所
作者单位	1.Chinese Acad Sci, Northwest Plateau Inst Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810001, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modelling, Beijing 100101, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Zou, Jingru,Luo, Caiyun,Xu, Xingliang,et al. Relationship of plant diversity with litter and soil available nitrogen in an alpine meadow under a 9-year grazing exclusion[J]. ECOLOGICAL RESEARCH,2016,31(6):841-851.
APA	Zou, Jingru,Luo, Caiyun,Xu, Xingliang,Zhao, Na,Zhao, Liang,&Zhao, Xinquan.(2016).Relationship of plant diversity with litter and soil available nitrogen in an alpine meadow under a 9-year grazing exclusion.ECOLOGICAL RESEARCH,31(6),841-851.
MLA	Zou, Jingru,et al."Relationship of plant diversity with litter and soil available nitrogen in an alpine meadow under a 9-year grazing exclusion".ECOLOGICAL RESEARCH 31.6(2016):841-851.