Arid
DOI10.1111/1365-2664.12390
Restricting access to invasion hubs enables sustained control of an invasive vertebrate
Letnic, Mike1,2,3; Webb, Jonathan K.3,4; Jessop, Tim S.5; Dempster, Tim5
通讯作者Letnic, Mike
来源期刊JOURNAL OF APPLIED ECOLOGY
ISSN0021-8901
EISSN1365-2664
出版年2015
卷号52期号:2页码:341-347
英文摘要

1. Biological invasions often occur through expansion of satellite populations that become established at ’invasion hubs’. Invasion hubs can result from random dispersal events, but frequently arise when invading individuals actively choose habitats using cues that signify high-quality environments where the fitness consequences are positive. Theoretical studies suggest that targeted control at invasion hubs can effectively suppress the populations and impacts of invaders.


2. In arid Australia, small dams that provide water for livestock function as invasion hubs by providing an invasive vertebrate, the cane toad Rhinella marina, with refuge from extreme aridity during the annual dry season. Toads are attracted to dams and use them as stepping stone habitats from which they disperse during rainy periods. Here, we ask whether sustained control of this invasive vertebrate can be achieved by converting invasion hubs into ecological traps. We did this by manipulating invasion hub habitats to induce a mismatch between toads’ habitat preference and the fitness consequences of their habitat choice to cause high mortality.


3. We constructed fences to exclude toads from dams and maintained these fences for 1 year. This period encompassed periods of dry and wet seasonal climatic conditions. Our manipulation did not alter the attractive cues for invading toads which died en masse while attempting to settle at fenced dams that prevented toads from reaching water. Toad populations at the fenced dams were suppressed by 1-2 orders of magnitude compared to unfenced controls and procedural controls. Toad populations remained suppressed for a year after exclusion.


4. By excluding toads from dams, we converted invasion hubs into ecological traps and effectively thwarted the reinvasion of cane toads. Our research suggests that water exclusion devices could be used to prevent toad invasion or to control cane toad populations in arid landscapes colonized by toads.


5. Synthesis and applications. Our study demonstrates that sustained control of invader populations can be achieved by restricting their access to invasion hubs. Control of invasive species via elimination of invasion hubs could be conducted reactively, to control established populations of invaders, or conducted strategically, by rendering invasion hubs unsuitable for colonization ahead of the invasion front to prevent further population spread.


英文关键词arid artificial water Bufo marinus ecological trap invasive species metapopulation Rhinella marina
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000352138100008
WOS关键词TOADS BUFO-MARINUS ; ECOLOGICAL TRAPS ; RHINELLA-MARINA ; CANE TOAD ; SPREAD ; WATER
WOS类目Biodiversity Conservation ; Ecology
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/188223
作者单位1.Univ New S Wales, Sch Biol Earth & Environm Sci, Sydney, NSW 2052, Australia;
2.Univ New S Wales, Ctr Ecosyst Sci, Sydney, NSW 2052, Australia;
3.Univ Sydney, Sch Biol Sci, Sydney, NSW 2006, Australia;
4.Univ Technol Sydney, Sch Environm, Sydney, NSW 2007, Australia;
5.Univ Melbourne, Dept Zool, Melbourne, Vic 3010, Australia
推荐引用方式
GB/T 7714
Letnic, Mike,Webb, Jonathan K.,Jessop, Tim S.,et al. Restricting access to invasion hubs enables sustained control of an invasive vertebrate[J],2015,52(2):341-347.
APA Letnic, Mike,Webb, Jonathan K.,Jessop, Tim S.,&Dempster, Tim.(2015).Restricting access to invasion hubs enables sustained control of an invasive vertebrate.JOURNAL OF APPLIED ECOLOGY,52(2),341-347.
MLA Letnic, Mike,et al."Restricting access to invasion hubs enables sustained control of an invasive vertebrate".JOURNAL OF APPLIED ECOLOGY 52.2(2015):341-347.
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Letnic, Mike]的文章
[Webb, Jonathan K.]的文章
[Jessop, Tim S.]的文章
百度学术
百度学术中相似的文章
[Letnic, Mike]的文章
[Webb, Jonathan K.]的文章
[Jessop, Tim S.]的文章
必应学术
必应学术中相似的文章
[Letnic, Mike]的文章
[Webb, Jonathan K.]的文章
[Jessop, Tim S.]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。