干旱区生态环境知识资源中心(Arid): Drought exacerbates negative consequences of high-intensity cattle grazing in a semiarid grassland

Arid

DOI	10.1002/eap.2048
	Drought exacerbates negative consequences of high-intensity cattle grazing in a semiarid grassland
	Souther, Sara 1; Loeser, Matthew 2; Crews, Timothy E.3; Sisk, Thomas 1
通讯作者	Souther, Sara
来源期刊	ECOLOGICAL APPLICATIONS
ISSN	1051-0761
EISSN	1939-5582
出版年	2020
卷号	30 期号:3
英文摘要	Grasslands managed for grazing are the largest land-use category globally, with a significant proportion of these grasslands occurring in semiarid and arid regions. In such dryland systems, the effect of grazing on native plant diversity has been equivocal, some studies suggesting that grazing reduces native plant diversity, others that grazing increases or has little impact on diversity. One impediment toward generalizing grazing effects on diversity in this region is that high levels of interannual variation in precipitation may obfuscate vegetative response patterns. By analyzing a long-term data set collected over a 20-yr period in a semiarid grassland, we explicitly evaluated the role of climate in regulating the effect of cattle grazing on plant communities, finding that climate interacted with grazing intensity to shape grassland communities. Community composition of plots that were intensively grazed varied considerably in response to climatic variation and native species richness was low relative to ungrazed and moderately grazed plots. Following a severe drought in 2002, exotic species richness rapidly increased in the high-intensity grazing plots. While this pattern was mirrored in the other treatments, exotic species richness increased to a greater extent and was slower to return to pre-drought levels in the high-intensity grazing plots. Overall, moderate grazing, even compared to grazing cessation, stabilized grassland communities through time, increased resilience to drought, and maintained the highest levels of native plant diversity and lowest levels of exotic diversity. These findings suggest that grazing, at moderate levels, may support grassland resilience to climate change in semiarid regions. However, grazing that exceeds tolerances, particularly in combination with extreme climatic events, like drought, can alter plant composition over relatively long timescales and possibly increase invasibility by nonnative species.
英文关键词	cattle grazing climate change drought exotic species plant diversity resilience southwestern United States
类型	Article
语种	英语
国家	USA
收录类别	SCI-E
WOS记录号	WOS:000506728300001
WOS关键词	BROMUS-TECTORUM INVASION ; LARGE HERBIVORES ; SHRUB ENCROACHMENT ; PLANT DIVERSITY ; CLIMATE-CHANGE ; VEGETATION ; HETEROGENEITY ; EXTRAPOLATION ; PRODUCTIVITY ; RAREFACTION
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
EI主题词	2020-01-13
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/312465
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 East Water Well Rd, Salina, KS 67401 USA
推荐引用方式 GB/T 7714	Souther, Sara,Loeser, Matthew,Crews, Timothy E.,et al. Drought exacerbates negative consequences of high-intensity cattle grazing in a semiarid grassland[J],2020,30(3).
APA	Souther, Sara,Loeser, Matthew,Crews, Timothy E.,&Sisk, Thomas.(2020).Drought exacerbates negative consequences of high-intensity cattle grazing in a semiarid grassland.ECOLOGICAL APPLICATIONS,30(3).
MLA	Souther, Sara,et al."Drought exacerbates negative consequences of high-intensity cattle grazing in a semiarid grassland".ECOLOGICAL APPLICATIONS 30.3(2020).