干旱区生态环境知识资源中心(Arid): Complex response of vegetation to grazing suggests need for coordinated, landscape-level approaches to grazing management

Arid

DOI	10.1016/j.gecco.2019.e00770
	Complex response of vegetation to grazing suggests need for coordinated, landscape-level approaches to grazing management
	Souther, Sara 1; Loeser, Matthew 2; Crews, Timothy E.3; Sisk, Thomas 4
通讯作者	Souther, Sara
来源期刊	GLOBAL ECOLOGY AND CONSERVATION
ISSN	2351-9894
出版年	2019
卷号	20
英文摘要	Management of domesticated ungulates on grasslands has the potential to affect ecosystem function at landscape to global scales. In the southwestern United States, introduction of livestock in the 1800s corresponded with grassland degradation and dramatic shifts in vegetation, including the rapid spread of invasive plant species. In contemporary grasslands, however, evidence increasingly suggests that responsible grazing may enhance plant diversity in the region, though positive effects on diversity may or may not offer corresponding benefits to ecosystem function. Here, we examined the effects of grazing on land cover and functional composition of a semiarid grassland over a 20-year period. We found that high intensity grazing increased exposed soil and shifted community composition toward a greater proportion of annual and exotic species. This was particularly apparent following a severe drought event that initiated a significant loss of perennial plant cover, especially forbs, and was followed by a nearly 4-fold expansion of exotic species. Plots that were grazed at moderate levels consistently exhibited the lowest proportion of exotic species and were similar in functional group composition to exclosure plots. However, moderate grazing did increase soil exposure relative to exclosure plots. These findings suggest that moderate grazing could provide benefits to grassland ecosystem diversity and correlated ecosystem services like invasive species control and pollination services, while simultaneously increasing erosion, reducing water infiltration and altering nutrient cycling, due to increased soil exposure and disturbance. The potential for grazing to exert antagonistic effects on ecosystem services, depending on site conditions and grazing intensity, suggests that livestock management decisions should be tailored to individual management and conservation goals that address the inherent spatiotemporal variability of arid grasslands. (c) 2019 The Authors. Published by Elsevier B.V.
英文关键词	Plant functional groups Climate change Southwestern United States Exotic species Ecosystem services Livestock management
类型	Article
语种	英语
国家	USA
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000498226800073
WOS关键词	BROMUS-TECTORUM L ; PLANT DIVERSITY ; ECOSYSTEM SERVICES ; CLIMATE-CHANGE ; TRANSITION MODELS ; FUNCTIONAL-GROUP ; TRAIT RESPONSES ; LIVESTOCK ; GRASSLAND ; RANGELANDS
WOS类目	Biodiversity Conservation ; Ecology
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
EI主题词	2019-10-01
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/310251
作者单位	1.No Arizona Univ, Landscape Conservat Initiat, ARD Bldg 56,Suite 130,1395 South Knoles Dr, Flagstaff, AZ 86011 USA; 2.Yakima Valley Coll, Life Sci Dept, POB 22520, Yakima, WA 98907 USA; 3.Land Inst, 2440 E Water Well Rd, Salina, KS 67401 USA; 4.No Arizona Univ, Landscape Conservat Initiat, Environm Sci & Policy, ARD Bldg 56,Suite 130,1395 South Knoles Dr, Flagstaff, AZ 86011 USA
推荐引用方式 GB/T 7714	Souther, Sara,Loeser, Matthew,Crews, Timothy E.,et al. Complex response of vegetation to grazing suggests need for coordinated, landscape-level approaches to grazing management[J],2019,20.
APA	Souther, Sara,Loeser, Matthew,Crews, Timothy E.,&Sisk, Thomas.(2019).Complex response of vegetation to grazing suggests need for coordinated, landscape-level approaches to grazing management.GLOBAL ECOLOGY AND CONSERVATION,20.
MLA	Souther, Sara,et al."Complex response of vegetation to grazing suggests need for coordinated, landscape-level approaches to grazing management".GLOBAL ECOLOGY AND CONSERVATION 20(2019).