Knowledge Resource Center for Ecological Environment in Arid Area
Removing an invader: evidence for forces reassembling a Chihuahuan Desert ecosystem | |
Ignace, Danielle D.1; Chesson, Peter2 | |
通讯作者 | Ignace, Danielle D. |
来源期刊 | ECOLOGY
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ISSN | 0012-9658 |
EISSN | 1939-9170 |
出版年 | 2014 |
卷号 | 95期号:11页码:3203-3212 |
英文摘要 | Community reassembly is an important concept in community ecology, but in most circumstances cannot be observed and is hypothetical. Reassembly of communities is an observable process that can be examined effectively following species invasions. Our study system in southeastern Arizona has declined in diversity and abundance of native winter annual plants coincident with a sustained irruption of a nonnative invasive Eurasian species, Erodium cicutarium, and a major reassembly of the winter annual plant community. To understand the role of E. cicutarium in the reassembly process, we initiated a multiyear E. cicutarium removal experiment that varied the timing of removal. Species richness was higher as a result of removal, although this effect was variable over time. Surprisingly, the abundance of native species collectively was decreased by E. cicutarium removal. However, previously rare Astragalus nuttallianus appears to be facilitated by E. cicutarium, as demonstrated by higher density and relative abundance in the presence of E. cicutarium, and is now codominant. Excluding A. nuttallianus abundance, the remaining native species are collectively increased by removal of E. cicutarium. Although our results showed strong effects of removal, the timing of removal never significantly affected any plant variables. Our experiment implicates a major role for E. cicutarium in the reassembly of the native plant community. Our work suggests a broadening of perspective on processes structuring annual plant communities in arid regions, and calls for an integrated approach beyond the recent popular focus on the interaction between competition and the physical environment. |
英文关键词 | Astragalus nuttallianus Chihuahuan Desert community reassembly Erodium cicutarium plant invasions winter annuals |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000345326000020 |
WOS关键词 | PLANT-COMMUNITIES ; BIOLOGICAL INVASIONS ; ERODIUM-CICUTARIUM ; SONORAN DESERT ; FACILITATION ; NICHE ; DIVERSITY ; DYNAMICS ; ANNUALS ; ENVIRONMENTS |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | University of Arizona |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/181713 |
作者单位 | 1.Smith Coll, Northampton, MA 01063 USA; 2.Univ Arizona, Tucson, AZ 85721 USA |
推荐引用方式 GB/T 7714 | Ignace, Danielle D.,Chesson, Peter. Removing an invader: evidence for forces reassembling a Chihuahuan Desert ecosystem[J]. University of Arizona,2014,95(11):3203-3212. |
APA | Ignace, Danielle D.,&Chesson, Peter.(2014).Removing an invader: evidence for forces reassembling a Chihuahuan Desert ecosystem.ECOLOGY,95(11),3203-3212. |
MLA | Ignace, Danielle D.,et al."Removing an invader: evidence for forces reassembling a Chihuahuan Desert ecosystem".ECOLOGY 95.11(2014):3203-3212. |
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