Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1890/13-1774.1 |
Granivory of invasive, naturalized, and native plants in communities differentially susceptible to invasion | |
Connolly, B. M.1; Pearson, D. E.2,3; Mack, R. N.1 | |
通讯作者 | Connolly, B. M. |
来源期刊 | ECOLOGY
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ISSN | 0012-9658 |
EISSN | 1939-9170 |
出版年 | 2014 |
卷号 | 95期号:7页码:1759-1769 |
英文摘要 | Seed predation is an important biotic filter that can influence abundance and spatial distributions of native species through differential effects on recruitment. This filter may also influence the relative abundance of nonnative plants within habitats and the communities’ susceptibility to invasion via differences in granivore identity, abundance, and food preference. We evaluated the effect of postdispersal seed predators on the establishment of invasive, naturalized, and native species within and between adjacent forest and steppe communities of eastern Washington, USA that differ in severity of plant invasion. Seed removal from trays placed within guild-specific exclosures revealed that small mammals were the dominant seed predators in both forest and steppe. Seeds of invasive species (Bromus tectorum, Cirsium arvense) were removed significantly less than the seeds of native (Pseudoroegneria spicata, Balsamorhiza sagittata) and naturalized (Secale cereale, Centaurea cyanus) species. Seed predation limited seedling emergence and establishment in both communities in the absence of competition in a pattern reflecting natural plant abundance: S. cereale was most suppressed, B. tectorum was least suppressed, and P. spicata was suppressed at an intermediate level. Furthermore, seed predation reduced the residual seed bank for all species. Seed mass correlated with seed removal rates in the forest and their subsequent effects on plant recruitment; larger seeds were removed at higher rates than smaller seeds. Our vegetation surveys indicate higher densities and canopy cover of nonnative species occur in the steppe compared with the forest understory, suggesting the steppe may be more susceptible to invasion. Seed predation alone, however, did not result in significant differences in establishment for any species between these communities, presumably due to similar total small-mammal abundance between communities. Consequently, preferential seed predation by small mammals predicts plant establishment for our test species within these communities but not between them. Accumulating evidence suggests that seed predation can be an important biotic filter affecting plant establishment via differences in consumer preferences and abundance with important ramifications for plant invasions and in situ community assembly. |
英文关键词 | biotic resistance eastern Washington, USA exclosure forest plant communities invasibility invasiveness recruitment seed addition seed bank seed predation steppe plant communities |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000339470500006 |
WOS关键词 | SEED PREDATION ; BIOTIC RESISTANCE ; POPULATION DYNAMICS ; BROMUS-TECTORUM ; REMOVAL ; RODENTS ; DESERT ; ABUNDANCE ; SIZE ; DISTURBANCE |
WOS类目 | Ecology |
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/2XILL650/181710 |
作者单位 | 1.Washington State Univ, Sch Biol Sci, Pullman, WA 99164 USA; 2.US Forest Serv, Rocky Mt Res Stn, USDA, Missoula, MT 59801 USA; 3.Univ Montana, Div Biol Sci, Missoula, MT 59812 USA |
推荐引用方式 GB/T 7714 | Connolly, B. M.,Pearson, D. E.,Mack, R. N.. Granivory of invasive, naturalized, and native plants in communities differentially susceptible to invasion[J],2014,95(7):1759-1769. |
APA | Connolly, B. M.,Pearson, D. E.,&Mack, R. N..(2014).Granivory of invasive, naturalized, and native plants in communities differentially susceptible to invasion.ECOLOGY,95(7),1759-1769. |
MLA | Connolly, B. M.,et al."Granivory of invasive, naturalized, and native plants in communities differentially susceptible to invasion".ECOLOGY 95.7(2014):1759-1769. |
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