Introduced predators and habitat structure influence range contraction of an endangered native predator, the northern quoll

Hernández-Santín, Lorna; Goldizen, Anne W.; Fisher, Diana O.

doi:10.1016/j.biocon.2016.09.023

Cited by 45 publications

(53 citation statements)

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“…prey densities, water), or type of camera trap site (e.g. random vs. trails, baited vs. not baited), which we did not account for, also play an important role in determining carnivore co-occurrence at the landscape level (Elmhagen & Rushton 2007;Hoeinghaus et al 2007;Bischof et al 2014;Peoples & Frimpong 2015;P eriquet et al 2015;Hernandez-Santin et al 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Temporal activity patterns, for example, are fluid and can be altered according to resource availability (Loveridge & Macdonald ; Hernandez‐Santin et al . ), changes in the abundance or behaviour of co‐occurring species (Creel et al . ; Ritchie & Johnson ) and human activity (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Additionally, while we assigned species according to their general temporal activity patterns, dietary habits and social structure, this categorisation may not adequately capture a species' behaviour at a particular study area or trap location. Temporal activity patterns, for example, are fluid and can be altered according to resource availability (Loveridge & Macdonald 2002;Hernandez-Santin et al 2016), changes in the abundance or behaviour of co-occurring species (Creel et al 2001;Ritchie & Johnson 2009) and human activity (e.g. McVittie 1979; Kitchen et al 2000).…”

Section: Discussionmentioning

confidence: 99%

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Ecological correlates of the spatial co‐occurrence of sympatric mammalian carnivores worldwide

et al. 2018

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The composition of local mammalian carnivore communities has far-reaching effects on terrestrial ecosystems worldwide. To better understand how carnivore communities are structured, we analysed camera trap data for 108 087 trap days across 12 countries spanning five continents. We estimate local probabilities of co-occurrence among 768 species pairs from the order Carnivora and evaluate how shared ecological traits correlate with probabilities of co-occurrence. Within individual study areas, species pairs co-occurred more frequently than expected at random. Co-occurrence probabilities were greatest for species pairs that shared ecological traits including similar body size, temporal activity pattern and diet. However, co-occurrence decreased as compared to other species pairs when the pair included a large-bodied carnivore. Our results suggest that a combination of shared traits and top-down regulation by large carnivores shape local carnivore communities globally.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Ecological correlates of the spatial co‐occurrence of sympatric mammalian carnivores worldwide

et al. 2018

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“…This leads us to question why dingo predation so rapidly caused our reintroduced quoll population to decline. Northern quolls have existed in sympatry with dingoes for at least 3500 years (Letnic et al 2014), and they are still sympatric in areas where quolls naturally persist (Schmitt et al 1989;Woinarski et al 2008;Hernandez-Santin et al 2016). Concomitant with their role as top predators, dingoes likely control populations of mesopredators such as quolls (Glen et al 2007;Letnic & Dworjanyn 2011).…”

Section: Discussionmentioning

confidence: 99%

Out of the frying pan: Reintroduction of toad‐smart northern quolls to southern Kakadu National Park

et al. 2017

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Invasive species are a leading cause of native biodiversity loss. In Australia, the toxic, invasive cane toad Rhinella marina has caused massive and widespread declines of northern quolls Dasyurus hallucatus. Quolls are fatally poisoned if they mistakenly prey on adult toads. To prevent the extinction of this native dasyurid from the Top End, an insurance population was set up in 2003 on two toad-free islands in Arnhem Land. In 2015, quolls were collected from one of these islands (Astell) for reintroduction. We used conditioned taste aversion to render 22 of these toad-na€ ıve quolls toad averse. Seven quolls received no taste aversion training. The source island was also predator-free, so all quolls received very basic predator-aversion training. In an attempt to reestablish the mainland population, we reintroduced these 29 northern quolls into Kakadu National Park in northern Australia where cane toads have been established for 13 years. The difference in survival between toadaverse and toad-naive quolls was immediately apparent. Toad-naive quolls were almost all killed by toads within 3 days. Toad-averse quolls, on the other hand, not only survived longer but also were recorded mating. Our predator training, however, was far less effective. Dingo predation accounted for a significant proportion of toadsmart quoll mortality. In Kakadu, dingoes have been responsible for high levels of quoll predation in the past and reintroduced animals are often vulnerable to predation-mediated population extinction. Dingoes may also be more effective predators in fire degraded landscapes. Together, these factors could explain the extreme predation mortality that we witnessed. In addition, predator aversion may have been lost from the predator-free island populations. These possibilities are not mutually exclusive but need to be investigated because they have clear bearing on the long-term recovery of the endangered northern quoll.

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“…The Pilbara region of Western Australia is the last remaining stronghold for the northern quoll, likely due to the absence of cane toads (Moore et al, 2019; Woinarski, Burbidge, & Harrison, 2014). Yet, this stronghold is far from secure, with predation by feral cats threatening Pilbara quoll populations (Cramer et al, 2016; Hernandez‐Santin, Goldizen, & Fisher, 2016), and >91% of the region under mining lease (Environmental Protection Authority, 2014). Conventional drill and blast mining in the Pilbara often destroys nonrenewable refuges and habitat (e.g., rocky outcrops), and is a primary driver of habitat loss for northern quolls (Cramer et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Artificial refuges to combat habitat loss for an endangered marsupial predator: How do they measure up?

Cowan

Dunlop

Turner

et al. 2020

Conservat Sci and Prac

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One technique used to combat the growing global species extinction crisis has been to create artificial refuges-human-made replacements for natural refuges destroyed during habitat modification. However, there is limited knowledge of how closely artificial refuges replicate the natural refuges they seek to replace. Mining threatens many species worldwide through large-scale habitat modification, and artificial refuges have been proposed as a method to offset the resulting habitat loss. Here, we examined the microclimatic, physical, and biotic characteristics of natural dens occupied by the northern quoll (Dasyurus hallucatus)-an endangered marsupial threatened by habitat loss-and compared these to (a) superficially similar unoccupied crevices, and (b) artificial dens created by mining companies for northern quolls. Northern quolls occupied natural dens that were cooler and deeper than unoccupied crevices, likely to avoid lethal air temperatures as well as predators. Artificial dens provided similar thermal properties to occupied dens, but lacked key characteristics in having shallower den cavities, less complex surrounding habitat, increased feral cat visitation, and less small mammal prey compared to occupied dens.This study highlights the need to consider multiple facets when constructing artificial refuges, in order to avoid perverse outcomes, such as inadequate shelter, increased predation, and food shortages.activity patterns, artificial den, artificial refuge, Dasyurus hallucatus, feral cat, habitat loss, habitat restoration, northern quoll, revegetation, thermal limits

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Introduced predators and habitat structure influence range contraction of an endangered native predator, the northern quoll

Cited by 45 publications

References 50 publications

Ecological correlates of the spatial co‐occurrence of sympatric mammalian carnivores worldwide

Ecological correlates of the spatial co‐occurrence of sympatric mammalian carnivores worldwide

Out of the frying pan: Reintroduction of toad‐smart northern quolls to southern Kakadu National Park

Artificial refuges to combat habitat loss for an endangered marsupial predator: How do they measure up?

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