干旱区生态环境知识资源中心(Arid): A trophic cascade initiated by an invasive vertebrate alters the structure of native reptile communities

Arid

DOI	10.1111/gcb.15032
	A trophic cascade initiated by an invasive vertebrate alters the structure of native reptile communities
	Feit, Benjamin 1; Dempster, Tim 2; Jessop, Tim S.3; Webb, Jonathan K.4; Letnic, Mike 5,6
通讯作者	Feit, Benjamin
来源期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
EISSN	1365-2486
出版年	2020
卷号	26 期号:5 页码:2829-2840
英文摘要	Invasive vertebrates are frequently reported to have catastrophic effects on the populations of species which they directly impact. It follows then, that if invaders exert strong suppressive effects on some species then other species will indirectly benefit due to ecological release from interactions with directly impacted species. However, evidence that invasive vertebrates trigger such trophic cascades and alter community structure in terrestrial ecosystems remains rare. Here, we ask how the cane toad, a vertebrate invader that is toxic to many of Australia's vertebrate predators, influences lizard assemblages in a semi-arid rangeland. In our study area, the density of cane toads is influenced by the availability of water accessible to toads. We compared an index of the abundance of sand goannas, a large predatory lizard that is susceptible to poisoning by cane toads and the abundances of four lizard families preyed upon by goannas (skinks, pygopods, agamid lizards and geckos) in areas where cane toads were common or rare. Consistent with the idea that suppression of sand goannas by cane toads initiates a trophic cascade, goanna activity was lower and small lizards were more abundant where toads were common. The hypothesis that suppression of sand goannas by cane toads triggers a trophic cascade was further supported by our findings that small terrestrial lizards that are frequently preyed upon by goannas were more affected by toad abundance than arboreal geckos, which are rarely consumed by goannas. Furthermore, the abundance of at least one genus of terrestrial skinks benefitted from allogenic ecosystem engineering by goannas where toads were rare. Overall, our study provides evidence that the invasion of ecosystems by non-native species can have important effects on the structure and integrity of native communities extending beyond their often most obvious and frequently documented direct ecological effects.
英文关键词	cane toad direct effects indirect effects invasive species Rhinella marina semi-arid trophic cascade Varanus gouldii
类型	Article
语种	英语
国家	Sweden ; Australia
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000526102300010
WOS关键词	TOADS BUFO-MARINUS ; AUSTRALIAN ARID ZONE ; CANE TOADS ; VARANUS-GOULDII ; IMPACT ; PREDATORS ; MESOPREDATOR ; INVADERS ; POINTS ; SPREAD
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
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/2XILL650/314631
作者单位	1.Swedish Univ Agr Sci, Dept Ecol, S-75007 Uppsala, Sweden; 2.Univ Melbourne, Sch Biosci, Melbourne, Vic, Australia; 3.Deakin Univ, Ctr Integrat Ecol, Sch Life & Environm Sci, Burwood, Vic, Australia; 4.Univ Technol Sydney, Sch Life Sci, Broadway, NSW, Australia; 5.Univ New South Wales, Ctr Ecosyst Sci, Sch BEES, Sydney, NSW, Australia; 6.Univ New South Wales, Evolut & Ecol Res Ctr, Sch BEES, Sydney, NSW, Australia
推荐引用方式 GB/T 7714	Feit, Benjamin,Dempster, Tim,Jessop, Tim S.,et al. A trophic cascade initiated by an invasive vertebrate alters the structure of native reptile communities[J],2020,26(5):2829-2840.
APA	Feit, Benjamin,Dempster, Tim,Jessop, Tim S.,Webb, Jonathan K.,&Letnic, Mike.(2020).A trophic cascade initiated by an invasive vertebrate alters the structure of native reptile communities.GLOBAL CHANGE BIOLOGY,26(5),2829-2840.
MLA	Feit, Benjamin,et al."A trophic cascade initiated by an invasive vertebrate alters the structure of native reptile communities".GLOBAL CHANGE BIOLOGY 26.5(2020):2829-2840.