Arid
DOI10.2111/REM-D-13-00140.1
Invasion is Contingent on Species Assemblage and Invasive Species Identity in Experimental Rehabilitation Plots
Leffler, A. Joshua1; Leonard, Eamonn D.2; James, Jeremy J.3; Monaco, Thomas A.4
通讯作者Leffler, A. Joshua
来源期刊RANGELAND ECOLOGY & MANAGEMENT
ISSN1550-7424
EISSN1551-5028
出版年2014
卷号67期号:6页码:657-666
英文摘要

Ecological studies often suggest that diverse communities are most resistant to invasion by exotic plants, but relatively few local species may be available to a rehabilitation practitioner. We examine the ability of monocultures and diverse assemblages to resist invasion by an exotic annual grass (cheatgrass) and an exotic biennial forb (dyer’s woad) in experimental rehabilitation plots. We constructed seven assemblages that included three monocultures of grass, forb, or shrub; three four-species mixtures of grasses, forbs, or shrubs; and a three-species mixture of one species from each growth form in an experimental field setting to test resistance to invasion. Assemblages were seeded with cheatgrass and dyer’s woad for two consecutive years and quantified as biomass and density of individuals from each exotic species. Soil NO3- and leaf-area index were examined as predictors of invasive plant abundance. Cheatgrass invasion was greatest in forb and shrub assemblages, and least in mixed grass or grass monoculture; dyer’s woad invasion was greatest into mixed grass or grass monoculture, but least into monoculture or mixedspecies assemblages composed of forbs or shrubs. The community composed of grasses, forbs, and shrubs suppressed invasion by both species. Consequently, assemblages were most resistant to invasion by species of the same growth form. Moreover, these monocultures and mixtures were generally similar in conferring resistance to invasion, but a monoculture of big sagebrush was more resistant than a mixture of shrubs. Soil NO3- was correlated with invasion by cheatgrass, whereas LAI was correlated with invasion by dyer’s woad, suggesting these species were more limited by belowground and aboveground resources, respectively. Overall, increasing diversity with limited species did not necessarily enhance resistance to invasion.


英文关键词cheatgrass dyer’s woad growth form invasion resistance species assemblage
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000345325600008
WOS关键词GREAT-BASIN DESERT ; CRESTED WHEATGRASS ; PLANT-COMMUNITIES ; PERENNIAL GRASS ; ECOLOGICAL RESTORATION ; RELATIVE IMPORTANCE ; BROMUS TECTORUM ; DIVERSITY ; COMPETITION ; RESISTANCE
WOS类目Ecology ; Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/184618
作者单位1.Univ Alaska Anchorage, Dept Biol Sci, Anchorage, AK 99508 USA;
2.Georgia Dept Nat Resources, Nat Resources Biol Nongame Conservat Sect, Brunswick, GA 31520 USA;
3.Univ Calif, Div Agr & Nat Resources, Sierra Foothills Res & Extens Ctr, Browns Valley, CA 95918 USA;
4.USDA ARS, Forage & Range Res Lab, Logan, UT 84322 USA
推荐引用方式
GB/T 7714
Leffler, A. Joshua,Leonard, Eamonn D.,James, Jeremy J.,et al. Invasion is Contingent on Species Assemblage and Invasive Species Identity in Experimental Rehabilitation Plots[J],2014,67(6):657-666.
APA Leffler, A. Joshua,Leonard, Eamonn D.,James, Jeremy J.,&Monaco, Thomas A..(2014).Invasion is Contingent on Species Assemblage and Invasive Species Identity in Experimental Rehabilitation Plots.RANGELAND ECOLOGY & MANAGEMENT,67(6),657-666.
MLA Leffler, A. Joshua,et al."Invasion is Contingent on Species Assemblage and Invasive Species Identity in Experimental Rehabilitation Plots".RANGELAND ECOLOGY & MANAGEMENT 67.6(2014):657-666.
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