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Reptiles on the brink: identifying the Australian terrestrial snake and lizard species most at risk of extinction

Citation

Geyle, HM and Tingley, R and Amey, AP and Cogger, H and Couper, PJ and Cowan, M and Craig, MD and Doughty, P and Driscoll, DA and Ellis, RJ and Emery, JP and Fenner, A and Gardner, MG and Garnett, ST and Gillespie, GR and Greenlees, MJ and Hoskin, CJ and Keogh, JS and Lloyd, R and Melville, J and McDonald, PJ and Michael, DR and Mitchell, NJ and Sanderson, C and Shea, GM and Sumner, J and Wapstra, E and Woinarski, JCZ and Chapple, DG, Reptiles on the brink: identifying the Australian terrestrial snake and lizard species most at risk of extinction, Pacific Conservation Biology pp. 1-10. ISSN 1038-2097 (2020) [Refereed Article]


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Copyright 2020 CSIRO

DOI: doi:10.1071/PC20033

Abstract

Australia hosts approximately 10% of the world's reptile species, the largest number of any country. Despite this and evidence of widespread decline, the first comprehensive assessment of the conservation status of Australian terrestrial squamates (snakes and lizards) was undertaken only recently. Here we apply structured expert elicitation to the 60 species assessed to be in the highest IUCN threat categories to estimate their probability of extinction by 2040. We also assessed the probability of successful reintroduction for two Extinct in the Wild (EW) Christmas Island species with trial reintroductions underway. Collation and analysis of expert opinion indicated that six species are at high risk (>50%) of becoming extinct within the next 20 years, and up to 11 species could be lost within this timeframe unless management improves. The consensus among experts was that neither of the EW species were likely to persist outside of small fenced areas without a significant increase in resources for intense threat management. The 20 most imperilled species are all restricted in range, with three occurring only on islands. The others are endemic to a single state, with 55% occurring in Queensland. Invasive species (notably weeds and introduced predators) were the most prevalent threats, followed by agriculture, natural system modifications (primarily fire) and climate change. Increased resourcing and management intervention are urgently needed to avert the impending extinction of Australia's imperilled terrestrial reptiles.

Item Details

Item Type:Refereed Article
Keywords:anthropogenic mass extinction crisis, Australia, biodiversity conservation, Delphi, expert elicitation, IDEA, lizard, reptile, snake, squamate, terrestrial, threatening processes
Research Division:Biological Sciences
Research Group:Evolutionary biology
Research Field:Speciation and extinction
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Wapstra, E (Associate Professor Erik Wapstra)
ID Code:141749
Year Published:2020
Web of Science® Times Cited:1
Deposited By:Zoology
Deposited On:2020-11-16
Last Modified:2020-12-16
Downloads:0

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