气候变化领域集成服务门户(CCPortal): The effects of grazing and fencing on grassland productivity and diversity in alpine grassland ecosystem in the Tibetan highland

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DOI	10.1016/j.gecco.2023.e02495
	The effects of grazing and fencing on grassland productivity and diversity in alpine grassland ecosystem in the Tibetan highland
	Xiang, Mingxue; Wu, Junxi; Duo, Lha; Niu, Ben; Zhang, Xianzhou
发表日期	2023
EISSN	2351-9894
卷号	44
英文摘要	Anthropogenic activities, such as grazing and fencing, have been known to alter the productivity and biodiversity of grassland ecosystems, potentially affecting their functioning. However, the impact of these activities on aboveground biomass (AGB) and plant diversity in alpine grasslands at different altitudes, as well as how they may be affected by soil nutrients and environmental climate, is not well understood. To address this knowledge gap, a study was conducted in the Lhasa Valley of Tibet. In 2013, twelve metal fences were set up at mountainous transects, and field surveys were conducted at twelve paired sites in early August 2021. The results of the study showed that AGB was slightly higher in fenced sites compared to grazed sites at altitudes from 4000 to 5100 m, but decreased with altitude at a slower rate in grazed sites. Plant diversity indices exhibited a unimodal pattern with increasing altitude, with no significant differences between fenced and grazed sites. Soil nutrients and environmental climate were found to be positively correlated with plant diversity indices and AGB at both fenced and grazed sites. Multiple linear regression models revealed that AGB and the Shannon index were largely influ-enced by soil nutrients (AP and AN) rather than by growing season soil temperature at fenced sites, while AGB and the Shannon index were more impacted by growing season soil temperature than by soil nutrients at grazed sites. These findings provide important insights into the impacts of grazing and fencing on above-ground biomass and plant diversity in mountainous environments.
关键词	Alpine grassland Altitude Plant diversity Productivity Soil nutrient Tibetan
英文关键词	PLANT-SPECIES DIVERSITY; LARGE ALTITUDINAL GRADIENT; SOIL ORGANIC-CARBON; ELEVATION GRADIENT; C STOCKS; EXCLUSION; NITROGEN; BIODIVERSITY; COMMUNITY; RICHNESS
WOS研究方向	Biodiversity Conservation ; Ecology
WOS记录号	WOS:001053939000001
来源期刊	GLOBAL ECOLOGY AND CONSERVATION
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/283496
作者单位	Chinese Academy of Sciences; Institute of Geographic Sciences & Natural Resources Research, CAS; Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS; Tibet University
推荐引用方式 GB/T 7714	Xiang, Mingxue,Wu, Junxi,Duo, Lha,et al. The effects of grazing and fencing on grassland productivity and diversity in alpine grassland ecosystem in the Tibetan highland[J],2023,44.
APA	Xiang, Mingxue,Wu, Junxi,Duo, Lha,Niu, Ben,&Zhang, Xianzhou.(2023).The effects of grazing and fencing on grassland productivity and diversity in alpine grassland ecosystem in the Tibetan highland.GLOBAL ECOLOGY AND CONSERVATION,44.
MLA	Xiang, Mingxue,et al."The effects of grazing and fencing on grassland productivity and diversity in alpine grassland ecosystem in the Tibetan highland".GLOBAL ECOLOGY AND CONSERVATION 44(2023).