干旱区生态环境知识资源中心(Arid): Assessing the rate and reversibility of large-herbivore effects on community composition in a semi-arid grassland ecosystem

Arid

DOI	10.1111/jvs.12934
	Assessing the rate and reversibility of large-herbivore effects on community composition in a semi-arid grassland ecosystem
	Wilmer, Hailey; Augustine, David J.; Derner, Justin D.; Milchunas, Daniel G.
通讯作者	Wilmer, H
来源期刊	JOURNAL OF VEGETATION SCIENCE
ISSN	1100-9233
EISSN	1654-1103
英文摘要	Questions What are the rate, reversibility, and degree of symmetry in plant species compositional change in response to the addition and removal of cattle grazing in the shortgrass steppe? Specifically, how does the imposition and removal of grazing affect the abundance of perennial C(4)shortgrasses and C(3)midgrasses that are of primary importance for livestock production in the region? Location Shortgrass steppe, northeastern Colorado, USA, in the North American Great Plains. Methods We evaluate rates and magnitude of basal cover change in newly ungrazed and newly grazed sites (established in 1991), relative to change in long-term (grazed and ungrazed) comparison treatments (established in 1939) over 25 years. We also compare shifts in species basal cover in newly implemented treatments relative to baseline community composition measured at the start of the study. Results Unlike the limited change observed in long-term treatments between 1939 and 1991, we documented more rapid, reversible and largely symmetric effects of both the imposition and removal of grazing between 1992 and 2017. This was primarily due to differences in the rate of increase in basal cover of C(3)midgrasses, litter, and bare ground. However, the rate and direction of change differed when assessed relative to continuously evaluated and (early-treatment) baseline cover data. Conclusions Studies of plant community change in response to large-herbivore grazing under varying ecological conditions and management regimes are needed to effectively guide the development and revision of state-and-transition models (STMs) for grassland managers, and to better detect and plan for dynamic ecological conditions. Effective adaptive management and STM development under a changing climate will recognize that effects of grazing and removal of grazing on shortgrass steppe can be reversible in a relatively symmetrical pattern, occurring within 6-16 years.
英文关键词	climate change grazing plant-herbivore interactions semiarid grassland shifting baselines shortgrass steppe state and transition models
类型	Article ; Early Access
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000568610100001
WOS关键词	TRANSITION MODELS ; SPECIES COMPOSITION ; SHORTGRASS STEPPE ; VEGETATION ; STATE ; DYNAMICS ; THRESHOLDS ; MANAGEMENT ; RANGELANDS ; KNOWLEDGE
WOS类目	Plant Sciences ; Ecology ; Forestry
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology ; Forestry
来源机构	Colorado State University ; E18
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328230
作者单位	[Wilmer, Hailey] US Forest Serv, USDA, Pacific Northwest Res Stn, Juneau, AK 99801 USA; [Wilmer, Hailey; Augustine, David J.; Derner, Justin D.] USDA ARS, Rangeland Res & Syst Res Unit, Cheyenne, WY USA; [Wilmer, Hailey; Augustine, David J.; Derner, Justin D.] USDA ARS, Rangeland Res & Syst Res Unit, Ft Collins, CO 80522 USA; [Milchunas, Daniel G.] Colorado State Univ, Laporte, CO USA
推荐引用方式 GB/T 7714	Wilmer, Hailey,Augustine, David J.,Derner, Justin D.,et al. Assessing the rate and reversibility of large-herbivore effects on community composition in a semi-arid grassland ecosystem[J]. Colorado State University, E18.
APA	Wilmer, Hailey,Augustine, David J.,Derner, Justin D.,&Milchunas, Daniel G..
MLA	Wilmer, Hailey,et al."Assessing the rate and reversibility of large-herbivore effects on community composition in a semi-arid grassland ecosystem".JOURNAL OF VEGETATION SCIENCE