Are N, P, and N:P stoichiometry limiting grazing exclusion effects on vegetation biomass and biodiversity in alpine grassland?

doi:10.1016/j.gecco.2020.e01315

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 > 山地表生过程与生态调控重点实验室

	Are N, P, and N:P stoichiometry limiting grazing exclusion effects on vegetation biomass and biodiversity in alpine grassland?
	Yan, Yan; Lu, Xuyang
刊名	GLOBAL ECOLOGY AND CONSERVATION
	2020-12-01
卷号	24 页码:e01315
关键词	Alpine grassland Effect size Nitrogen Phosphorus N:P stoichiometry Qinghai-Tibetan Plateau
ISSN号	2351-9894
DOI	10.1016/j.gecco.2020.e01315
通讯作者	Lu, Xuyang(xylu@imde.ac.cn)
产权排序	1
文献子类	Article
英文摘要	Nitrogen (N), phosphorus (P), and N:P stoichiometry have been proposed as an index to assess plant nutrient limitation in grassland. The alpine grasslands in Tibet were investigated to evaluate the relationships between N, P, N:P ratio and vegetation biomass and species biodiversity by comparing free grazing (FG) and grazing exclusion (GE) grasslands. Grazing exclusion had no significant effect on N, P concentrations and N:P ratio of both plant shoot and root, but significantly reduced soil N, P concentrations by 15.5% and 12.6%, respectively. In general, both biomass and biodiversity indicators positively correlated with shoot P, negatively correlated with shoot N:P ratio. Nevertheless, they had different correlation patterns with soil stoichiometry, the biomass indicators positively correlated with soil N and N:P ratios, but the biodiversity indicators negatively correlated with them. Furthermore, the effect sizes of above-ground biomass were significantly correlated with the ratio of soil N:P between GE and FG plots and the effect sizes of biodiversity indicators were significantly correlated with the ratio of soil P between GE and FG plots. Therefore, how extent of grazing exclusion effects on biomass allocation depends on how difference of soil N:P ratio between inside and outside of fencing, while how extent of grazing exclusion effects on biodiversity depends on how difference of soil P ratio between them. (C) 2020 The Author(s). Published by Elsevier B.V.
资助项目	National Natural Science Foundation of China[41871049] ; National Natural Science Foundation of China[41871072] ; National Natural Science Foundation of China[41877338]
WOS关键词	PLANT-SPECIES LOSS ; TIBETAN PLATEAU ; PHOSPHORUS LIMITATION ; ECOSYSTEM RESPIRATION ; NUTRIENT LIMITATION ; NITROGEN ENRICHMENT ; TERRESTRIAL PLANTS ; SOIL PROPERTIES ; CARBON STORAGE ; CLIMATE-CHANGE
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000608479300007
资助机构	National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/55821]
专题	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
通讯作者	Lu, Xuyang
作者单位	Chinese Acad Sci, Key Lab Mt Surface Proc & Ecol Regulat, Chengdu 610041, Peoples R China
推荐引用方式 GB/T 7714	Yan, Yan,Lu, Xuyang. Are N, P, and N:P stoichiometry limiting grazing exclusion effects on vegetation biomass and biodiversity in alpine grassland?[J]. GLOBAL ECOLOGY AND CONSERVATION,2020,24:e01315.
APA	Yan, Yan,&Lu, Xuyang.(2020).Are N, P, and N:P stoichiometry limiting grazing exclusion effects on vegetation biomass and biodiversity in alpine grassland?.GLOBAL ECOLOGY AND CONSERVATION,24,e01315.
MLA	Yan, Yan,et al."Are N, P, and N:P stoichiometry limiting grazing exclusion effects on vegetation biomass and biodiversity in alpine grassland?".GLOBAL ECOLOGY AND CONSERVATION 24(2020):e01315.