Excluding access to invasion hubs can contain the spread of an invasive vertebrate

Florance, D; Webb, JK; Dempster, T; Kearney, MR; Worthing, A; Letnic, M

Excluding access to invasion hubs can contain the spread of an invasive vertebrate

Florance, D Webb, JK

Dempster, T Kearney, MR Worthing, A Letnic, M

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Publication Type:: Journal Article
Citation:: Proceedings of the Royal Society B: Biological Sciences, 2011, 278 (1720), pp. 2900 - 2908
Issue Date:: 2011-01-01

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Field	Value	Language
dc.contributor.author	Florance, D	en_US
dc.contributor.author	Webb, JK https://orcid.org/0000-0003-4822-6829	en_US
dc.contributor.author	Dempster, T	en_US
dc.contributor.author	Kearney, MR	en_US
dc.contributor.author	Worthing, A	en_US
dc.contributor.author	Letnic, M	en_US
dc.date.issued	2011-01-01	en_US
dc.identifier.citation	Proceedings of the Royal Society B: Biological Sciences, 2011, 278 (1720), pp. 2900 - 2908	en_US
dc.identifier.issn	0962-8452	en_US
dc.identifier.uri	http://hdl.handle.net/10453/32435
dc.description.abstract	Many biological invasions do not occur as a gradual expansion along a continuous front, but result from the expansion of satellite populations that become established at 'invasion hubs'. Although theoretical studies indicate that targeting control efforts at invasion hubs can effectively contain the spread of invasions, few studies have demonstrated this in practice. In arid landscapes worldwide, humans have increased the availability of surface water by creating artificial water points (AWPs) such as troughs and dams for livestock. By experimentally excluding invasive cane toads (Bufo marinus) from AWP, we show that AWP provide a resource subsidy for non-arid-adapted toads and serve as dry season refuges and thus invasion hubs for cane toads in arid Australia. Using data on the distribution of permanent water in arid Australia and the dispersal potential of toads, we predict that systematically excluding toads from AWP would reduce the area of arid Australia across which toads are predicted to disperse and colonize under average climatic conditions by 38 per cent from 2 242 000 to 1 385 000 km2. Our study shows how human modification of hydrological regimes can create a network of invasion hubs that facilitates a biological invasion, and confirms that targeted control at invasion hubs can reduce landscape connectivity to contain the spread of an invasive vertebrate. © 2011 The Royal Society.	en_US
dc.relation.ispartof	Proceedings of the Royal Society B: Biological Sciences	en_US
dc.relation.isbasedon	10.1098/rspb.2011.0032	en_US
dc.subject.mesh	Animals	en_US
dc.subject.mesh	Bufo marinus	en_US
dc.subject.mesh	Ecosystem	en_US
dc.subject.mesh	Seasons	en_US
dc.subject.mesh	Rivers	en_US
dc.subject.mesh	Demography	en_US
dc.subject.mesh	Pest Control	en_US
dc.subject.mesh	Northern Territory	en_US
dc.subject.mesh	Introduced Species	en_US
dc.title	Excluding access to invasion hubs can contain the spread of an invasive vertebrate	en_US
dc.type	Journal Article
utslib.citation.volume	1720	en_US
utslib.citation.volume	278	en_US
utslib.for	0602 Ecology	en_US
utslib.for	06 Biological Sciences	en_US
utslib.for	07 Agricultural and Veterinary Sciences	en_US
utslib.for	11 Medical and Health Sciences	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Life Sciences
utslib.copyright.status	closed_access
pubs.issue	1720	en_US
pubs.publication-status	Published	en_US
pubs.volume	278	en_US

Abstract:

Many biological invasions do not occur as a gradual expansion along a continuous front, but result from the expansion of satellite populations that become established at 'invasion hubs'. Although theoretical studies indicate that targeting control efforts at invasion hubs can effectively contain the spread of invasions, few studies have demonstrated this in practice. In arid landscapes worldwide, humans have increased the availability of surface water by creating artificial water points (AWPs) such as troughs and dams for livestock. By experimentally excluding invasive cane toads (Bufo marinus) from AWP, we show that AWP provide a resource subsidy for non-arid-adapted toads and serve as dry season refuges and thus invasion hubs for cane toads in arid Australia. Using data on the distribution of permanent water in arid Australia and the dispersal potential of toads, we predict that systematically excluding toads from AWP would reduce the area of arid Australia across which toads are predicted to disperse and colonize under average climatic conditions by 38 per cent from 2 242 000 to 1 385 000 km2. Our study shows how human modification of hydrological regimes can create a network of invasion hubs that facilitates a biological invasion, and confirms that targeted control at invasion hubs can reduce landscape connectivity to contain the spread of an invasive vertebrate. © 2011 The Royal Society.

Please use this identifier to cite or link to this item:

http://hdl.handle.net/10453/32435