Modelling mammalian extinction and forecasting recovery: koalas at Iluka (NSW, Australia)

Lunney, Daniel; O’Neill, Lisa; Matthews, Alison; Sherwin, William B.

doi:10.1016/s0006-3207(01)00233-6

Cited by 63 publications

(47 citation statements)

References 23 publications

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“…Jones 2000) could be considered for key locations where koala movements occur over roads. Our findings are consistent with other research that suggests that habitat augmentation, safe road crossing and minimising dog attacks, as well as disease management (see Griffith and Higgins 2012), are key management actions that must be enacted together to ensure the conservation of koala populations (see Lunney et al 2002;Rhodes et al 2011).…”

Section: Management Implicationssupporting

confidence: 91%

Home range areas of koalas in an urban area of north-east New South Wales

Goldingay

Dobner

2014

Aust. Mammalogy

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Abstract. Conserving wildlife within urban areas requires knowledge of habitat requirements and population processes, and the management of threatening factors. The koala (Phascolarctos cinereus) is one species that is adversely affected by urban development. Sick and injured koalas in the Lismore urban area are regularly taken into care. We radio-tracked koalas released from care in order to estimate home-range areas and to determine their fate. Koalas were tracked for periods of 90-742 days; 7 of 10 survived for a period of at least one year. Home ranges defined by the minimum convex polygon (MCP100%) were large (mean AE s.e. = 37.4 AE 8.2 ha). Analysis using the 95% Fixed Kernel revealed home-range areas of 8.0 AE 1.7 ha. Analysis of the habitat composition of each MCP home range showed that they included 4.3 AE 0.9 ha of primary habitat (dominated by their primary food trees). These home ranges contained 27.6 AE 6.8 ha of non-habitat (cleared or developed land). Koalas crossed roads within their home ranges at least 5-53 times; one crossed the Bruxner Highway near a roundabout at least 32 times over his 2-year tracking period. Future management should include strategic food tree planting that enhances habitat connectivity and minimises the risk of car strike or dog attack.

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Section: Management Implicationssupporting

confidence: 91%

Home range areas of koalas in an urban area of north-east New South Wales

Goldingay

Dobner

2014

Aust. Mammalogy

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“…Since there are 25 other towns and villages that could be considered to average broadly similar perimeters within bushland settings, the road kills of reptiles, just at the interface with the bushland, could conservatively be estimated to be between 4,576 and 6,838 annually. In some areas the loss would be greater, for example, where new roads have been developed (see e.g., Lunney et al 2002), in areas of higher traffic density and/or higher speed zones, and on the wider roads that connect towns and villages (see e.g., Burgin and Brainwood, 2008).…”

Section: Resultsmentioning

confidence: 99%

“…Species may become locally extinct as a result of new road development (Lunney et al 2002), and the long term viability of some vertebrate populations have been compromised (e.g., Jones, 2000;Ramp and Ben-Ami 2006). The streets sampled for road kills in this study have remained effectively unchanged for over 20 years and, therefore, are not considered to be subject to the impacts that are associated with 'new' roads.…”

Section: Discussionmentioning

confidence: 99%

The impact on native herpetofauna due to traffic collision at the interface between a suburban area and the Greater Blue Mountains World Heritage Area: an ecological disaster?

Wotherspoon

Burgin

2011

Australian Zoologist

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Vehicle collision resulting in animal mortality is a common daily occurrence, although few studies have considered the impact on herpetofauna in urban areas. Over a 7 year period (2003 -2010), 1.4 km of suburban streets of Falconbridge that interface with the Greater Blue Mountains World Heritage Area, west of Sydney, was surveyed on foot two to four days a week, typically soon after dawn. Over the period a total of 86 reptiles that represented 20 species: 38% of the lizard and 56% of snake species known from the area were collected as road kills due to collision with vehicles. This equated to approximately one individual per month that was collected across the 7 years. Representatives of six frog species were also identified as road kills (33% of the local frog fauna). In Faulconbridge, 20-30 km of 50 km/hr roadways interface with the national park and there are 26 towns within the World Heritage Area. Each of these towns has a network of streets that covers much more than just the perimeter of the town, and there are two major highways that bisect the World Heritage Area. Although an average death rate of one reptile per month may be considered negligible, the cumulative loss of reptiles due to vehicle collision in the region is an ecological disaster.

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“…In relation to conservation of Australian forest fauna, PVA has been used to effectively model local mammalian extinction and recovery processes (Lunney et al 2002), population responses of arboreal mammals in relation to modified logging regimes (Lindenmayer and Possingham 1995) and the impact of habitat fragmentation on endangered forest birds (Akcakaya et al 1995). Lindenmayer et al (1993) and Lindenmayer and Possingham (1994) have provided reviews of the effectiveness of PVA in Australia.…”

Section: Assessing Conservation Prognoses With Pvamentioning

confidence: 99%