Arid
DOI10.1007/s11258-011-9942-y
The roles of exotic grasses and forbs when restoring native species to highly invaded southern California annual grassland
Cox, Robert D.1,2; Allen, Edith B.1,2
通讯作者Cox, Robert D.
来源期刊PLANT ECOLOGY
ISSN1385-0237
出版年2011
卷号212期号:10页码:1699-1707
英文摘要

Many semi-arid shrublands in the western US have experienced invasion by a suite of exotic grasses and forbs that have altered community structure and function. The effect of the exotic grasses in this area has been studied, but little is known about how exotic forbs influence the plant community. A 3-year experiment in southern California coastal sage scrub (CSS) now dominated by exotic grasses was done to investigate the influence of both exotic grasses (mainly Bromus spp.) and exotic forbs (mainly Erodium spp.) on a restoration seeding (9 species, including grasses, forbs, and shrubs). Experimental plots were weeded to remove one, both, or neither group of exotic species and seeded at a high rate with a mix of native species. Abundance of all species varied with precipitation levels, but seeded species established best when both groups of exotic species were removed. The removal of exotic grasses resulted in an increase in exotic and native forb cover, while removal of exotic forbs led to an increase in exotic grass cover and, at least in one year, a decrease in native forb cover. In former CSS now converted to exotic annual grassland, a competitive hierarchy between exotic grasses and forbs may prevent native forbs from more fully occupying the habitat when either group of exotics is removed. This apparent competitive hierarchy may interact with yearly variation in precipitation levels to limit restoration seedings of CSS/exotic grassland communities. Therefore, management of CSS and exotic grassland in southern California and similar areas must consider control of both exotic grasses and forbs when restoration is attempted.


英文关键词Bromus California annual grassland Coastal sage scrub Erodium Grassland restoration Removal experiment
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000295983700011
WOS关键词COASTAL SAGE SCRUB ; ERODIUM-MACROPHYLLUM ; BIOLOGICAL INVASIONS ; COMPETITION ; RESTORATION ; DIVERSITY ; SUCCESSION ; IMPACTS ; FIRE ; DISTURBANCE
WOS类目Plant Sciences ; Ecology ; Forestry
WOS研究方向Plant Sciences ; Environmental Sciences & Ecology ; Forestry
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/170037
作者单位1.Univ Calif Riverside, Dept Bot & Plant Sci, Riverside, CA 92521 USA;
2.Univ Calif Riverside, Ctr Conservat Biol, Riverside, CA 92521 USA
推荐引用方式
GB/T 7714
Cox, Robert D.,Allen, Edith B.. The roles of exotic grasses and forbs when restoring native species to highly invaded southern California annual grassland[J],2011,212(10):1699-1707.
APA Cox, Robert D.,&Allen, Edith B..(2011).The roles of exotic grasses and forbs when restoring native species to highly invaded southern California annual grassland.PLANT ECOLOGY,212(10),1699-1707.
MLA Cox, Robert D.,et al."The roles of exotic grasses and forbs when restoring native species to highly invaded southern California annual grassland".PLANT ECOLOGY 212.10(2011):1699-1707.
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