干旱区生态环境知识资源中心(Arid): N deposition may accelerate grassland degradation succession from grasses-and sedges-dominated into forbs-dominated in overgrazed alpine grassland systems on Qinghai-Tibetan Plateau

Arid

DOI	10.1016/j.ecolind.2021.107898
	N deposition may accelerate grassland degradation succession from grasses-and sedges-dominated into forbs-dominated in overgrazed alpine grassland systems on Qinghai-Tibetan Plateau
	Shen, Hao; Dong, Shikui; DiTommaso, Antonio; Xiao, Jiannan; Zhi, Yangliu
通讯作者	Dong, SK (corresponding author), Beijing Forestry Univ, Coll Grassland Sci, Beijing 100083, Peoples R China. ; Dong, SK (corresponding author), Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100875, Peoples R China.
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2021
卷号	129
英文摘要	Alpine grasslands are sensitive to grazing and atmospheric nitrogen (N) deposition. Despite increases in N deposition, few field studies have assessed the effects of grazing in conjunction with increased N deposition on alpine grassland vegetation. In this two-year field study, we examined the effects of overgrazing and overgrazing plus N deposition on ecophysiological processes of alpine grassland plants at the functional group level. We found that both overgrazing and overgrazing plus N deposition altered species composition and the dominance of three plant functional groups (grasses, sedges, and forbs) in an alpine meadow and alpine steppe. In the overgrazing and overgrazing plus N deposition treatments, forbs dominated the plant community. Grass and sedge dominance decreased substantially, relative to a ungrazed treatment. The underlying eco-physiological processes that led to the forb-dominated plant community differed between the overgrazing and overgrazing plus N deposition treatments. Overgrazing plus N deposition increased forb dominance both directly by selective herbivory and indirectly by enhancing forb photosynthetic rates. Our results suggest that overgrazing concomitant with increases in N deposition will likely shift the plant community composition of alpine grasslands on the Qinghai-Tibetan Plateau from grass/sedge communities to forb-dominated communities in the future.
英文关键词	N deposition Overgrazing Plant functional groups Photosynthesis Respiration
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000685517300002
WOS关键词	SIMULATED NITROGEN DEPOSITION ; INNER-MONGOLIA ; SOIL CARBON ; GRAZING EXCLUSION ; DESERT STEPPE ; MANAGEMENT ; VEGETATION ; PRODUCTIVITY ; DIVERSITY ; MEADOWS
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	北京师范大学 ; 北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362987
作者单位	[Shen, Hao; Dong, Shikui] Beijing Forestry Univ, Coll Grassland Sci, Beijing 100083, Peoples R China; [Shen, Hao; Dong, Shikui; Xiao, Jiannan; Zhi, Yangliu] Beijing Normal Univ, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Con, Beijing 100875, Peoples R China; [Dong, Shikui] Cornell Univ, Dept Nat Resources, Ithaca, NY 14853 USA; [Shen, Hao; DiTommaso, Antonio] Cornell Univ, Sch Integrat Plant Sci, Soil & Crop Sci, Ithaca, NY 14853 USA
推荐引用方式 GB/T 7714	Shen, Hao,Dong, Shikui,DiTommaso, Antonio,et al. N deposition may accelerate grassland degradation succession from grasses-and sedges-dominated into forbs-dominated in overgrazed alpine grassland systems on Qinghai-Tibetan Plateau[J]. 北京师范大学, 北京林业大学,2021,129.
APA	Shen, Hao,Dong, Shikui,DiTommaso, Antonio,Xiao, Jiannan,&Zhi, Yangliu.(2021).N deposition may accelerate grassland degradation succession from grasses-and sedges-dominated into forbs-dominated in overgrazed alpine grassland systems on Qinghai-Tibetan Plateau.ECOLOGICAL INDICATORS,129.
MLA	Shen, Hao,et al."N deposition may accelerate grassland degradation succession from grasses-and sedges-dominated into forbs-dominated in overgrazed alpine grassland systems on Qinghai-Tibetan Plateau".ECOLOGICAL INDICATORS 129(2021).