Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1890/04-1533 |
Eradication of invasive Tamarix ramosissima along a desert stream increases native fish density | |
Kennedy, TA; Finlay, JC; Hobbie, SE | |
通讯作者 | Kennedy, TA |
来源期刊 | ECOLOGICAL APPLICATIONS
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ISSN | 1051-0761 |
出版年 | 2005 |
卷号 | 15期号:6页码:2072-2083 |
英文摘要 | Spring ecosystems of the western United States have high conservation value, particularly because of the highly endemic, and often endangered, fauna that they support. Refuges now protect these habitats from many of the human impacts that once threatened them, but invasive species often persist. Invasive saltcedar is ubiquitous along streams, rivers, and spring ecosystems of the western United States, yet the impact of salcedar invasion on these ecosystems, or ecosystem I response to its removal, have rarely been quantified. Along Jackrabbit Spring, a springbrook in Nevada that supports populations of two endangered fish (Ash Meadows pupfish and Ash Meadows speckled dace) as well as several exotic aquatic consumers, we quantified the response of aquatic consumers to large-scale saltcedar removal and identified the mechanism underlying consumer response to the removal. Clearing saltcedar from, the riparian zone increased densities of native pupfish and exotic screw snails, but decreased the density of exotic crayfish. Positive effects of saltcedar removal on pupfish and snails occurred because saltcedar heavily shades the stream, greatly reducing the availability of algae for herbivores. This was confirmed by analyses of potential organic matter sources and consumer C-13: pupfish and snails, along with native dace and exotic mosquitofish, relied heavily on algae-derived carbon and not saltcedar-derived carbon. By contrast, crayfish delta(13)C values mirrored algae delta(13)C during summer, but in winter indicated reliance on allochthonous saltcedar litter that dominated organic inputs in saltcedar reaches and on algae-derived carbon where saltcedar was absent. The seasonal use of saltcedar by crayfish. likely explains its negative response to saltcedar removal. Clearing saltcedar effectively restored the springbrook of Jackrabbit Spring to the conditions characteristic of native vegetation sites. Given the high conservation value of spring ecosystems and the potential conservation benefits of saltcedar removal that this research highlights, eradicating saltcedar from spring ecosystems of the western United States should clearly be a management priority. |
英文关键词 | biological invasion crayfish desert springbrook ecosystem restoration food web mosquitofish pupfish screw snail speckled dace stable isotope Tamarix |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000233858900019 |
WOS关键词 | CARBON-ISOTOPE RATIOS ; CRAYFISH PROCAMBARUS-CLARKII ; STABLE-CARBON ; FOOD-WEB ; BIOLOGICAL INVASIONS ; WATER VELOCITY ; UNITED-STATES ; RIVER ; ECOLOGY ; DELTA-N-15 |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | United States Geological Survey |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/148838 |
作者单位 | (1)Univ Minnesota, Dept Ecol Evolut & Behav, St Paul, MN 55108 USA |
推荐引用方式 GB/T 7714 | Kennedy, TA,Finlay, JC,Hobbie, SE. Eradication of invasive Tamarix ramosissima along a desert stream increases native fish density[J]. United States Geological Survey,2005,15(6):2072-2083. |
APA | Kennedy, TA,Finlay, JC,&Hobbie, SE.(2005).Eradication of invasive Tamarix ramosissima along a desert stream increases native fish density.ECOLOGICAL APPLICATIONS,15(6),2072-2083. |
MLA | Kennedy, TA,et al."Eradication of invasive Tamarix ramosissima along a desert stream increases native fish density".ECOLOGICAL APPLICATIONS 15.6(2005):2072-2083. |
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