气候变化领域集成服务门户(CCPortal): Suitable duration of grazing exclusion for restoration of a degraded alpine meadow on the eastern Qinghai-Tibetan Plateau

CCPortal

DOI	10.1016/j.catena.2021.105582
	Suitable duration of grazing exclusion for restoration of a degraded alpine meadow on the eastern Qinghai-Tibetan Plateau
	Zhang, Zhenchao; Liu, Yu; Sun, Jian; Wu, Gao-Lin
通讯作者	Sun, J (通讯作者)，Chinese Acad Sci, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst Sci LATP, Beijing 100101, Peoples R China.
发表日期	2021
ISSN	0341-8162
EISSN	1872-6887
卷号	207
英文摘要	Grazing exclusion (GE) is a key national ecological restoration project widely applied to rehabilitate degraded grasslands. To date, there have been many debates on the effectiveness of GE for grassland recovery, and it is still poorly understood how degraded alpine meadows in the semi-humid area with relative rich rainfall in the Qinghai-Tibetan Plateau respond to GE with different durations. We selected a chronosequence of grazing-excluded alpine meadows to examine the dynamics of grassland functions. The results showed that the dominant functional group shifted from forbs to graminoids after 8 to 10 years GE and then returned to forbs. The plant population density increased significantly with GE time (P < 0.01). The total biomass, species richness, Shannon diversity index, and relative importance value of graminoids first increased and then decreased with increasing plant population density, whereas the relative importance value of forbs presented the opposite trend. All turning points were between 1350 and 1650 plants per m(2) which occurred from 8 to 10 years of GE. As the duration of GE increased, the ecosystem multifunctionality first dramatically increased and then became steady after 8 to 10 years of GE. These findings imply that GE is of great practical significance to prevent degradation in semi-humid regions of the Qinghai-Tibetan Plateau, where we recommend that GE should cease after approximately 8 to 10 years to restore degraded alpine meadows from the perspective of plant productivity, diversity, community structure, and ecosystem multifunctionality.
关键词	BELOW-GROUND BIOMASS VEGETATIVE ECOLOGICAL CHARACTERISTICS RESOURCE-RATIO HYPOTHESIS GRASSLAND PLANT DIVERSITY SOIL ORGANIC-CARBON HORQIN SANDY LAND NITROGEN STORAGE RANGELAND DEGRADATION SPECIES RICHNESS ECOSYSTEM CARBON
英文关键词	Degraded alpine meadow; Grassland management; Grazing exclusion; Restoration chronosequence; The Qinghai-Tibetan Plateau
语种	英语
WOS研究方向	Geology ; Agriculture ; Water Resources
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS记录号	WOS:000703268900007
来源期刊	CATENA
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254745
作者单位	[Zhang, Zhenchao; Liu, Yu; Wu, Gao-Lin] Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China; [Zhang, Zhenchao; Sun, Jian] Chinese Acad Sci, Inst Tibetan Plateau Res, State Key Lab Tibetan Plateau Earth Syst Sci LATP, Beijing 100101, Peoples R China; [Liu, Yu; Wu, Gao-Lin] Chinese Acad Sci, Northwest Inst Plateau Biol, Qinghai Prov Key Lab Restorat Ecol Cold Area, Xining 810008, Peoples R China; [Liu, Yu; Wu, Gao-Lin] Qinghai Univ, Qinghai Acad Anim & Vet Sci, State Key Lab Plateau Ecol & Agr, Xining 810016, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhenchao,Liu, Yu,Sun, Jian,et al. Suitable duration of grazing exclusion for restoration of a degraded alpine meadow on the eastern Qinghai-Tibetan Plateau[J]. 中国科学院西北生态环境资源研究院,2021,207.
APA	Zhang, Zhenchao,Liu, Yu,Sun, Jian,&Wu, Gao-Lin.(2021).Suitable duration of grazing exclusion for restoration of a degraded alpine meadow on the eastern Qinghai-Tibetan Plateau.CATENA,207.
MLA	Zhang, Zhenchao,et al."Suitable duration of grazing exclusion for restoration of a degraded alpine meadow on the eastern Qinghai-Tibetan Plateau".CATENA 207(2021).