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Svenning JC, Buitenwerf R, Le Roux E. Trophic rewilding as a restoration approach under emerging novel biosphere conditions. Curr Biol 2024; 34:R435-R451. [PMID: 38714176 DOI: 10.1016/j.cub.2024.02.044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/09/2024]
Abstract
Rewilding is a restoration approach that aims to promote self-regulating complex ecosystems by restoring non-human ecological processes while reducing human control and pressures. Rewilding is forward-looking in that it aims to enhance functionality for biodiversity, accepting and indeed promoting the dynamic nature of ecosystems, rather than fixating on static composition or structure. Rewilding is thus especially relevant in our epoch of increasingly novel biosphere conditions, driven by strong human-induced global change. Here, we explore this hypothesis in the context of trophic rewilding - the restoration of trophic complexity mediated by wild, large-bodied animals, known as 'megafauna'. This focus reflects the strong ecological impacts of large-bodied animals, their widespread loss during the last 50,000 years and their high diversity and ubiquity in the preceding 50 million years. Restoring abundant, diverse, wild-living megafauna is expected to promote vegetation heterogeneity, seed dispersal, nutrient cycling and biotic microhabitats. These are fundamental drivers of biodiversity and ecosystem function and are likely to gain importance for maintaining a biodiverse biosphere under increasingly novel ecological conditions. Non-native megafauna species may contribute to these effects as ecological surrogates of extinct species or by promoting ecological functionality within novel assemblages. Trophic rewilding has strong upscaling potential via population growth and expansion of wild fauna. It is likely to facilitate biotic adaptation to changing climatic conditions and resilience to ecosystem collapse, and to curb some negative impacts of globalization, notably the dominance of invasive alien plants. Finally, we discuss the complexities of realizing the biodiversity benefits that trophic rewilding offers under novel biosphere conditions in a heavily populated world.
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Affiliation(s)
- Jens-Christian Svenning
- Center for Ecological Dynamics in a Novel Biosphere (ECONOVO), Department of Biology, Aarhus University, Ny Munkegade 114, DK-8000 Aarhus C, Denmark.
| | - Robert Buitenwerf
- Center for Ecological Dynamics in a Novel Biosphere (ECONOVO), Department of Biology, Aarhus University, Ny Munkegade 114, DK-8000 Aarhus C, Denmark
| | - Elizabeth Le Roux
- Center for Ecological Dynamics in a Novel Biosphere (ECONOVO), Department of Biology, Aarhus University, Ny Munkegade 114, DK-8000 Aarhus C, Denmark; Department of Zoology and Entomology, Faculty of Natural and Agricultural Sciences, Mammal Research Institute, University of Pretoria, Pretoria 0028, South Africa
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McLean D, Goldingay R, Letnic M. Diet of the Dingo in Subtropical Australian Forests: Are Small, Threatened Macropods at Risk? Animals (Basel) 2023; 13:2257. [PMID: 37508035 PMCID: PMC10376500 DOI: 10.3390/ani13142257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Revised: 06/14/2023] [Accepted: 07/06/2023] [Indexed: 07/30/2023] Open
Abstract
Carnivores fulfil important ecological roles in natural systems yet can also jeopardise the persistence of threatened species. Understanding their diet is, therefore, essential for managing populations of carnivores, as well as those of their prey. This study was designed to better understand the diet of an Australian apex predator, the dingo, and determine whether it poses a threat to at-risk small macropods in two floristically different yet geographically close reserves in subtropical Australia. Based on an analysis of 512 scats, dingo diets comprised 34 different prey taxa, of which 50% were common between reserves. Our findings add support to the paradigm that dingoes are opportunistic and generalist predators that prey primarily on abundant mammalian fauna. Their diets in the Border Ranges were dominated by possum species (frequency of occurrence (FOC) = 92.5%), while their diets in Richmond Range were characterised by a high prevalence of pademelon species (FOC = 46.9%). Medium-sized mammals were the most important dietary items in both reserves and across all seasons. The dietary frequency of medium-sized mammals was generally related to their availability (indexed by camera trapping); however, the avoidance of some species with high availability indicates that prey accessibility may also be important in dictating their dietary choices. Other prey categories were supplementary to diets and varied in importance according to seasonal changes in their availability. The diets included two threatened macropods, the red-legged pademelon and black-striped wallaby. Our availability estimates, together with earlier dietary studies spanning 30 years, suggest that the red-legged pademelon is resilient to the observed predation. The black-striped wallaby occurred in only two dingo scats collected from Richmond Range and was not detected by cameras so the threat to this species could not be determined. Two locally abundant but highly threatened species (the koala and long-nosed potoroo) were not detected in the dingoes' diets, suggesting dingoes do not at present pose a threat to these populations. Our study highlights the importance of site-based assessments, population monitoring and including data on prey availability in dietary investigations.
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Affiliation(s)
- Dusty McLean
- Faculty of Science and Engineering, Southern Cross University, Lismore, NSW 2480, Australia
| | - Ross Goldingay
- Faculty of Science and Engineering, Southern Cross University, Lismore, NSW 2480, Australia
| | - Mike Letnic
- Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences, University of New South Wales, Sydney, NSW 2052, Australia
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Donfrancesco V, Allen BL, Appleby R, Behrendorff L, Conroy G, Crowther MS, Dickman CR, Doherty T, Fancourt BA, Gordon CE, Jackson SM, Johnson CN, Kennedy MS, Koungoulos L, Letnic M, Leung LK, Mitchell KJ, Nesbitt B, Newsome T, Pacioni C, Phillip J, Purcell BV, Ritchie EG, Smith BP, Stephens D, Tatler J, van Eeden LM, Cairns KM. Understanding conflict among experts working on controversial species: A case study on the Australian dingo. CONSERVATION SCIENCE AND PRACTICE 2023. [DOI: 10.1111/csp2.12900] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Affiliation(s)
| | - Benjamin L. Allen
- University of Southern Queensland Institute for Life Sciences and the Environment Toowoomba Queensland Australia
- Centre for African Conservation Ecology Nelson Mandela University Port Elizabeth South Africa
| | - Rob Appleby
- Centre for Planetary Health and Food Security Griffith University Nathan Queensland Australia
| | - Linda Behrendorff
- School of Agriculture and Food Sciences University of Queensland Gatton Queensland Australia
| | - Gabriel Conroy
- Genecology Research Centre, School of Science, Technology and Engineering University of the Sunshine Coast Maroochydore DC Queensland Australia
| | - Mathew S. Crowther
- School of Life and Environmental Sciences University of Sydney New South Wales Australia
| | - Christopher R. Dickman
- Desert Ecology Research Group, School of Life and Environmental Sciences University of Sydney Sydney New South Wales Australia
| | - Tim Doherty
- Desert Ecology Research Group, School of Life and Environmental Sciences University of Sydney Sydney New South Wales Australia
| | - Bronwyn A. Fancourt
- Ecosystem Management, School of Environmental and Rural Science University of New England Armidale New South Wales Australia
| | - Christopher E. Gordon
- Center for Biodiversity Dynamics in a Changing World Aarhus University Aarhus C Denmark
| | - Stephen M. Jackson
- Collection Care and Conservation Australian Museum Research Institute Sydney New South Wales Australia
| | - Chris N. Johnson
- School of Natural Sciences and Australian Research Council Centre of Excellence for Australian Biodiversity and Heritage University of Tasmania Hobart Tasmania Australia
| | - Malcolm S. Kennedy
- Threatened Species Operations Department of Environment and Science Brisbane Queensland Australia
| | - Loukas Koungoulos
- Department of Archaeology, School of Philosophical and Historical Inquiry The University of Sydney Sydney New South Wales Australia
| | - Mike Letnic
- Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences University of New South Wales Sydney New South Wales Australia
- Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences University of New South Wales Sydney New South Wales Australia
| | - Luke K.‐P. Leung
- School of Agriculture and Food Sciences University of Queensland Gatton Queensland Australia
| | - Kieren J. Mitchell
- Australian Research Council Centre of Excellence for Australian Biodiversity and Heritage, School of Biological Sciences University of Adelaide Adelaide South Australia Australia
| | - Bradley Nesbitt
- School of Environmental and Rural Science University of New England Armidale New South Wales Australia
| | - Thomas Newsome
- Global Ecology Lab, School of Life and Environmental Sciences University of Sydney Sydney New South Wales Australia
| | - Carlo Pacioni
- Department of Environment, Land, Water and Planning Arthur Rylah Institute Heidelberg Victoria Australia
- Environmental and Conservation Sciences Murdoch University Murdoch Western Australia Australia
| | | | - Brad V. Purcell
- Kangaroo Management Program Office of Environment and Heritage Dubbo New South Wales Australia
| | - Euan G. Ritchie
- School of Life and Environmental Sciences and Centre for Integrative Ecology Deakin University Burwood Victoria Australia
| | - Bradley P. Smith
- College of Psychology, School of Health, Medical and Applied Sciences CQUniversity Australia Wayville South Australia Australia
| | | | - Jack Tatler
- Narla Environmental Pty Ltd Warriewood New South Wales Australia
| | - Lily M. van Eeden
- Department of Environment, Land, Water and Planning Arthur Rylah Institute Heidelberg Victoria Australia
| | - Kylie M. Cairns
- Centre for Ecosystem Science, School of Biological, Earth and Environmental Sciences University of New South Wales Sydney New South Wales Australia
- Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences University of New South Wales Sydney New South Wales Australia
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Gaschk JL, Del Simone K, Wilson RS, Clemente CJ. Resting disparity in quoll semelparity: examining the sex-linked behaviours of wild roaming northern quolls ( Dasyurus hallucatus) during breeding season. ROYAL SOCIETY OPEN SCIENCE 2023; 10:221180. [PMID: 36756058 PMCID: PMC9890097 DOI: 10.1098/rsos.221180] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Accepted: 01/10/2023] [Indexed: 06/18/2023]
Abstract
Semelparity is a breeding strategy whereby an individual invests large amounts of resources into a single breeding season, leading to the death of the individual. Male northern quolls (Dasyurus hallucatus) are the largest known mammal to experience a post-breeding die-off; however, the cause of their death is unknown, dissimilar from causes in other semelparous dasyurids. To identify potential differences between male northern quolls that breed once, and females that can breed for up to four seasons, the behaviours, activity budgets, speeds and distances travelled were examined. Northern quolls were captured on Groote Eylandt off the coast of the Northern Territory, Australia, and were fitted with accelerometers. A machine learning algorithm (Self-organizing Map) was trained on more than 76 h of recorded footage of quoll behaviours and used to predict behaviours in 42 days of data from wild roaming quolls (7M : 6F). Male northern quolls were more active (male 1.27 g, s.d. = 0.41; female 1.18 g, s.d. = 0.36), spent more time walking (13.09% male: 8.93% female) and engaged in less lying/resting behaviour than female northern quolls (7.67% male: 23.65% female). Reduced resting behaviour among males could explain the post-breeding death as the deterioration in appearance reflects that reported for sleep-deprived rodents.
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Affiliation(s)
- Joshua L. Gaschk
- School of Science, Technology and Engineering, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia
| | - Kaylah Del Simone
- School of Biological Sciences, University of Queensland, St Lucia, QLD 4067, Australia
| | - Robbie S. Wilson
- School of Biological Sciences, University of Queensland, St Lucia, QLD 4067, Australia
| | - Christofer J. Clemente
- School of Science, Technology and Engineering, University of the Sunshine Coast, Sippy Downs, QLD 4556, Australia
- School of Biological Sciences, University of Queensland, St Lucia, QLD 4067, Australia
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Fleming PA, Stobo-Wilson AM, Crawford HM, Dawson SJ, Dickman CR, Doherty TS, Fleming PJS, Newsome TM, Palmer R, Thompson JA, Woinarski JCZ. Distinctive diets of eutherian predators in Australia. ROYAL SOCIETY OPEN SCIENCE 2022; 9:220792. [PMID: 36312571 PMCID: PMC9554524 DOI: 10.1098/rsos.220792] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Accepted: 09/16/2022] [Indexed: 06/01/2023]
Abstract
Introduction of the domestic cat and red fox has devastated Australian native fauna. We synthesized Australian diet analyses to identify traits of prey species in cat, fox and dingo diets, which prey were more frequent or distinctive to the diet of each predator, and quantified dietary overlap. Nearly half (45%) of all Australian terrestrial mammal, bird and reptile species occurred in the diets of one or more predators. Cat and dingo diets overlapped least (0.64 ± 0.27, n = 24 location/time points) and cat diet changed little over 55 years of study. Cats were more likely to have eaten birds, reptiles and small mammals than foxes or dingoes. Dingo diet remained constant over 53 years and constituted the largest mammal, bird and reptile prey species, including more macropods/potoroids, wombats, monotremes and bandicoots/bilbies than cats or foxes. Fox diet had greater overlap with both cats (0.79 ± 0.20, n = 37) and dingoes (0.73 ± 0.21, n = 42), fewer distinctive items (plant material, possums/gliders) and significant spatial and temporal heterogeneity over 69 years, suggesting the opportunity for prey switching (especially of mammal prey) to mitigate competition. Our study reinforced concerns about mesopredator impacts upon scarce/threatened species and the need to control foxes and cats for fauna conservation. However, extensive dietary overlap and opportunism, as well as low incidence of mesopredators in dingo diets, precluded resolution of the debate about possible dingo suppression of foxes and cats.
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Affiliation(s)
- Patricia A. Fleming
- Centre for Terrestrial Ecosystem Science and Sustainability, Harry Butler Institute, Murdoch University, 90 South Street, Murdoch, Western Australia 6150, Australia
| | - Alyson M. Stobo-Wilson
- NESP Threatened Species Recovery Hub, Charles Darwin University, Casuarina, Northern Territory 0909, Australia
- CSIRO Land and Water, PMB 44, Winnellie, Northern Territory 0822, Australia
| | - Heather M. Crawford
- Centre for Terrestrial Ecosystem Science and Sustainability, Harry Butler Institute, Murdoch University, 90 South Street, Murdoch, Western Australia 6150, Australia
| | - Stuart J. Dawson
- Centre for Terrestrial Ecosystem Science and Sustainability, Harry Butler Institute, Murdoch University, 90 South Street, Murdoch, Western Australia 6150, Australia
- Department of Primary Industries and Regional Development, 3 Baron-Hay Court, South Perth, Western Australia 6151, Australia
| | - Chris R. Dickman
- Desert Ecology Research Group, School of Life and Environmental Sciences, The University of Sydney, Heydon-Laurence Building A08, Camperdown, New South Wales 2006, Australia
| | - Tim S. Doherty
- School of Life and Environmental Sciences, The University of Sydney, Heydon-Laurence Building A08, Camperdown, New South Wales 2006, Australia
| | - Peter J. S. Fleming
- Vertebrate Pest Research Unit, NSW Department of Primary Industries, Orange Agricultural Institute, 1447 Forest Road, Orange, New South Wales 2800, Australia
- Ecosystem Management, School of Environmental and Rural Science, University of New England, Armidale, New South Wales 2351, Australia
- Institute for Agriculture and the Environment, Centre for Sustainable Agricultural Systems, University of Southern Queensland, Toowoomba, Queensland 4350, Australia.
| | - Thomas M. Newsome
- School of Life and Environmental Sciences, The University of Sydney, Heydon-Laurence Building A08, Camperdown, New South Wales 2006, Australia
| | - Russell Palmer
- Department of Biodiversity, Conservation and Attractions, Locked Bag 104, Bentley Delivery Centre, Western Australia 6983, Australia
| | - Jim A. Thompson
- Queensland Museum Network, PO Box 3300, South Brisbane BC, Queensland 4101, Australia
| | - John C. Z. Woinarski
- Research Institute for the Environment and Livelihoods, Charles Darwin University, Casuarina, Northern Territory 0909, Australia
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Harriott L, Amos M, Brennan M, Elsworth P, Gentle M, Kennedy M, Pople T, Scanlan J, Speed J, Osunkoya OO. State‐wide prioritisation of vertebrate pest animals in Queensland, Australia. ECOLOGICAL MANAGEMENT & RESTORATION 2022. [DOI: 10.1111/emr.12563] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/19/2023]
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Augusteyn J, McCarthy MA, Robley A, Pople A, Nolan B, Hemson G, Melzer R, Richards S, Dinwoodie A. Bringing back the endangered bridled nail-tailed wallaby at Taunton National Park (Scientific) through effective predator control. WILDLIFE RESEARCH 2022. [DOI: 10.1071/wr21067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Fancourt BA, Zirbel C, Cremasco P, Elsworth P, Harry G, Gentle MN. Field assessment of the risk of feral cat baits to nontarget species in eastern Australia. INTEGRATED ENVIRONMENTAL ASSESSMENT AND MANAGEMENT 2022; 18:224-244. [PMID: 33969610 DOI: 10.1002/ieam.4445] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Revised: 04/07/2021] [Accepted: 05/03/2021] [Indexed: 06/12/2023]
Abstract
Feral cats (Felis catus) pose a significant threat to wildlife, agriculture, and human health through predation, disease transmission, and competition with native animals. Controlling feral cats and their impacts, however, is challenging. New and emerging 1080-based feral cat baits have shown promising results in western and central Australia; however, the safety of these new baits for nontarget species in eastern Australia, where many native animals are more sensitive to compound 1080 (sodium fluoroacetate) than their western conspecifics, has not been assessed. We investigated the uptake of 499 toxic Eradicat® baits by nontarget animals across five different eastern Australian environs and the uptake of nontoxic Eradicat and Hisstory® baits at an additional two sites. Using field-based observations of species eating or removing baits, we determined that 13 nontarget species (eight mammals, four birds, and one reptile) were at high risk of individual mortality, with individuals of 11 of those 13 species (seven mammals, four birds) observed consuming enough toxic Eradicat in a single visit to ingest a lethal dose of 1080. Feral cats (the target species) consumed only 3.1% of monitored baits, which was only 52% of the 31 baits they encountered. We recommend undertaking targeted population monitoring of species identified at high risk of individual mortality, to determine whether Eradicat baits present a population-level risk to these species. Our findings suggest that the small-sized Eradicat baits present a greater risk to nontarget species in eastern Australia than the larger traditional 1080-based meat baits used for the control of wild dogs and foxes. Our study highlights the importance of performing risk assessments for different bait types, even when the same toxin is used, and of performing site-specific nontarget risk assessments of new baits such as Eradicat to assist developing guidelines for their safe and effective use in different environs. Integr Environ Assess Manag 2022;18:224-244. © 2021 State of Queensland. Integrated Environmental Assessment and Management © 2021 SETAC.
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Affiliation(s)
- Bronwyn A Fancourt
- Pest Animal Research Centre, Biosecurity Queensland, Department of Agriculture and Fisheries, Toowoomba, Queensland, Australia
- School of Environmental and Rural Science, University of New England, Armidale, New South Wales, Australia
| | - Christine Zirbel
- Pest Animal Research Centre, Biosecurity Queensland, Department of Agriculture and Fisheries, Toowoomba, Queensland, Australia
| | - Peter Cremasco
- Pest Animal Research Centre, Biosecurity Queensland, Department of Agriculture and Fisheries, Toowoomba, Queensland, Australia
| | - Peter Elsworth
- Pest Animal Research Centre, Biosecurity Queensland, Department of Agriculture and Fisheries, Toowoomba, Queensland, Australia
| | - Glen Harry
- Pest Animal Research Centre, Biosecurity Queensland, Department of Agriculture and Fisheries, Toowoomba, Queensland, Australia
| | - Matthew N Gentle
- Pest Animal Research Centre, Biosecurity Queensland, Department of Agriculture and Fisheries, Toowoomba, Queensland, Australia
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Castle G, Smith D, Allen LR, Allen BL. Terrestrial mesopredators did not increase after top-predator removal in a large-scale experimental test of mesopredator release theory. Sci Rep 2021; 11:18205. [PMID: 34521924 PMCID: PMC8440509 DOI: 10.1038/s41598-021-97634-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 08/25/2021] [Indexed: 12/02/2022] Open
Abstract
Removal or loss of top-predators has been predicted to cause cascading negative effects for ecosystems, including mesopredator release. However, reliable evidence for these processes in terrestrial systems has been mixed and equivocal due, in large part, to the systemic and continued use of low-inference study designs to investigate this issue. Even previous large-scale manipulative experiments of strong inferential value have been limited by experimental design features (i.e. failure to prevent migration between treatments) that constrain possible inferences about the presence or absence of mesopredator release effects. Here, we build on these previous strong-inference experiments and report the outcomes of additional large-scale manipulative experiments to eradicate Australian dingoes from two fenced areas where dingo migration was restricted and where theory would predict an increase in extant European red foxes, feral cats and goannas. We demonstrate the removal and suppression of dingoes to undetectable levels over 4–5 years with no corresponding increases in mesopredator relative abundances, which remained low and stable throughout the experiment at both sites. We further demonstrate widespread absence of negative relationships between predators, indicating that the mechanism underpinning predicted mesopredator releases was not present. Our results are consistent with all previous large-scale manipulative experiments and long-term mensurative studies which collectively demonstrate that (1) dingoes do not suppress red foxes, feral cats or goannas at the population level, (2) repeated, temporary suppression of dingoes in open systems does not create mesopredator release effects, and (3) removal and sustained suppression of dingoes to undetectable levels in closed systems does not create mesopredator release effects either. Our experiments add to similar reports from North America, Asia, Europe and southern Africa which indicate that not only is there a widespread absence of reliable evidence for these processes, but there is also a large and continually growing body of experimental evidence of absence for these processes in many terrestrial systems. We conclude that although sympatric predators may interact negatively with each other on smaller spatiotemporal scales, that these negative interactions do not always scale-up to the population level, nor are they always strong enough to create mesopredator suppression or release effects.
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Affiliation(s)
- Geoff Castle
- Institute for Life Sciences and the Environment, University of Southern Queensland, Toowoomba, QLD, 4350, Australia
| | - Deane Smith
- Institute for Life Sciences and the Environment, University of Southern Queensland, Toowoomba, QLD, 4350, Australia.,NSW Department of Primary Industries, Vertebrate Pest Research Unit, Armidale, NSW, 2351, Australia
| | - Lee R Allen
- Department of Agriculture and Fisheries, Queensland Government, Toowoomba, QLD, 4350, Australia
| | - Benjamin L Allen
- Institute for Life Sciences and the Environment, University of Southern Queensland, Toowoomba, QLD, 4350, Australia. .,Centre for African Conservation Ecology, Nelson Mandela University, Port Elizabeth, 6034, South Africa.
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Henderson T, Fancourt BA, Rajaratnam R, Vernes K, Ballard G. Spatial and temporal interactions between endangered spotted‐tailed quolls and introduced red foxes in a fragmented landscape. J Zool (1987) 2021. [DOI: 10.1111/jzo.12919] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- T. Henderson
- Ecosystem Management School of Environmental and Rural Science University of New England Armidale NSW Australia
| | - B. A. Fancourt
- Ecosystem Management School of Environmental and Rural Science University of New England Armidale NSW Australia
| | - R. Rajaratnam
- Geography and Planning School of Humanities and Social Science University of New England Armidale NSW Australia
| | - K. Vernes
- Ecosystem Management School of Environmental and Rural Science University of New England Armidale NSW Australia
| | - G. Ballard
- Ecosystem Management School of Environmental and Rural Science University of New England Armidale NSW Australia
- Vertebrate Pest Research Unit Department of Primary Industries University of New England Armidale NSW Australia
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Sévêque A, Gentle LK, Vicente López‐Bao J, Yarnell RW, Uzal A. Impact of human disturbance on temporal partitioning within carnivore communities. Mamm Rev 2021. [DOI: 10.1111/mam.12265] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Anthony Sévêque
- School of Animal, Rural and Environmental Sciences Nottingham Trent University Southwell NottinghamshireNG25 0QFUK
| | - Louise K. Gentle
- School of Animal, Rural and Environmental Sciences Nottingham Trent University Southwell NottinghamshireNG25 0QFUK
| | | | - Richard W. Yarnell
- School of Animal, Rural and Environmental Sciences Nottingham Trent University Southwell NottinghamshireNG25 0QFUK
| | - Antonio Uzal
- School of Animal, Rural and Environmental Sciences Nottingham Trent University Southwell NottinghamshireNG25 0QFUK
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12
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Roshier DA, Carter A. Space use and interactions of two introduced mesopredators, European red fox and feral cat, in an arid landscape. Ecosphere 2021. [DOI: 10.1002/ecs2.3628] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- David A. Roshier
- Australian Wildlife Conservancy PO Box 8070 Subiaco East Western Australia 6008 Australia
| | - Andrew Carter
- Australian Wildlife Conservancy PO Box 8070 Subiaco East Western Australia 6008 Australia
- Institute for Land, Water and Society Charles Sturt University PO Box 789 Albury New South Wales 2640 Australia
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Kreplins T, Kennedy M, O'Leary R, Adams P, Dundas S, Fleming P. Fighting like cats and dogs? Dingoes do not constrain spatial and temporal movements of feral cats. FOOD WEBS 2021. [DOI: 10.1016/j.fooweb.2020.e00173] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Fancourt BA, Augusteyn J, Cremasco P, Nolan B, Richards S, Speed J, Wilson C, Gentle MN. Measuring, evaluating and improving the effectiveness of invasive predator control programs: Feral cat baiting as a case study. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2021; 280:111691. [PMID: 33272660 DOI: 10.1016/j.jenvman.2020.111691] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 11/10/2020] [Accepted: 11/16/2020] [Indexed: 06/12/2023]
Abstract
Reducing the impacts of invasive predators is a key objective for conservation managers, livestock producers and human health agencies globally. The efficacy of invasive predator control programs, however, is highly variable. To improve control efficacy, managers require a fundamental understanding of the factors that contribute to the success or failure of a control program. Using a predator baiting program as a case study, we measured the efficacy of baiting as a control tool to significantly reduce feral cat (Felis catus) populations. We used camera traps and cat-borne GPS collars to monitor changes in feral cat populations at a baited site and an unbaited site, using a Before-After, Control-Impact (BACI) design. We also identified five key elements required for a successful baiting program (bait encounter rate, availability, attractiveness, palatability and lethality) and simultaneously measured these to identify areas for potential improvement. Baiting was ineffective at reducing feral cat populations; collared cat mortality was only 11% (1/9), with camera traps revealing negligible reductions in the number of cat detection events (9%), naïve occupancy (15%), and no significant change in the relative abundance of feral cats (F1,54 = 0.8641, P = 0.357). Several factors contributed to the poor control efficacy. Bait encounter rates were low, with cats active along tracks (where baits were laid) < 4% of the time. Cats encountered only 14% (7/50) of monitored baits, but none were eaten. Initially, baits appeared attractive to cats; however meat ants and desiccation rapidly decreased bait palatability. Bait availability to cats declined rapidly, with 36% of monitored baits (18/50) removed by non-target species within the first 48 h. The mortality of one collared cat and chemical assays confirmed that, on average, each bait contained sufficient 1080 to kill a large (>5 kg) feral cat. Our findings suggest that altering bait deployment patterns, increasing bait densities and improving bait palatability could potentially improve the efficacy of baiting programs to reduce feral cat populations. Our study provides a framework to measure and evaluate the key elements that contribute to efficacy of pest control programs, and to identify opportunities for improving outcomes of future control programs.
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Affiliation(s)
- Bronwyn A Fancourt
- Pest Animal Research Centre, Department of Agriculture and Fisheries, Biosecurity Queensland, Toowoomba, Queensland, 4350, Australia; School of Environmental and Rural Science, University of New England, Armidale, NSW, 2351, Australia; Vertebrate Pest Research Unit, Department of Primary Industries, Armidale, NSW, 2350, Australia.
| | - John Augusteyn
- Ecological Assessment Unit, Queensland Parks and Wildlife Service and Partnerships, Department of Environment and Science, Rockhampton, Queensland, 4701, Australia
| | - Peter Cremasco
- Pest Animal Research Centre, Department of Agriculture and Fisheries, Biosecurity Queensland, Toowoomba, Queensland, 4350, Australia
| | - Barry Nolan
- Technical Support Pest Management, Queensland Parks and Wildlife Service and Partnerships, Department of Environment and Science, 4802, Airlie Beach, Queensland, Australia
| | - Samuel Richards
- Queensland Parks and Wildlife Service and Partnerships, Department of Environment and Science, Rockhampton, Queensland, 4701, Australia
| | - James Speed
- Pest Animal Research Centre, Department of Agriculture and Fisheries, Biosecurity Queensland, Toowoomba, Queensland, 4350, Australia
| | - Cameron Wilson
- Pest Animal Research Centre, Department of Agriculture and Fisheries, Biosecurity Queensland, Toowoomba, Queensland, 4350, Australia
| | - Matthew N Gentle
- Pest Animal Research Centre, Department of Agriculture and Fisheries, Biosecurity Queensland, Toowoomba, Queensland, 4350, Australia
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16
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Sparkes J, Fleming PJS, McSorley A, Mitchell B. What are we missing? How the delay-period setting on camera traps affects mesopredator detection. AUSTRALIAN MAMMALOGY 2021. [DOI: 10.1071/am19068] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Trigger-delays are often set on camera traps to save labour costs involved with servicing camera traps and reviewing images. However, the effects that delays of various length could have on data quantity and quality are unmeasured. Here, we aimed to assess how varying trigger-delays (5, 10, 30 and 60min) or using an ‘independent event’ classification (i.e. a series of images taken less than 5min apart on the same camera trap) affects detection rates and the number of individuals per trigger for feral cats and European red foxes. Using real camera trap images, we simulated trigger-delays of between 5min and 60min and compared with the independent events. Trigger-delays caused inaccuracies in detection frequencies of 3.6–22.0% for feral cats and 3.1–24.0% for foxes. Further, 68% of independent events in which two individual foxes were present were reduced to a single fox trigger when implementing a 5-min trigger-delay (n=65). Using trigger-delays likely reduces accuracy and reliability of data generated for wildlife monitoring programs and could affect the types of observations and analyses able to be made from imagery so obtained.
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17
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McHugh D, Goldingay RL, Parkyn J, Goodwin A, Letnic M. Short‐term response of threatened small macropods and their predators to prescribed burns in subtropical Australia. ECOLOGICAL MANAGEMENT & RESTORATION 2020. [DOI: 10.1111/emr.12407] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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18
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Stobo‐Wilson AM, Stokeld D, Einoder LD, Davies HF, Fisher A, Hill BM, Mahney T, Murphy BP, Stevens A, Woinarski JCZ, Rangers B, Warddeken Rangers, Gillespie GR. Habitat structural complexity explains patterns of feral cat and dingo occurrence in monsoonal Australia. DIVERS DISTRIB 2020. [DOI: 10.1111/ddi.13065] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Affiliation(s)
- Alyson M. Stobo‐Wilson
- NESP Threatened Species Recovery Hub Research Institute for the Environment and Livelihoods Charles Darwin University Darwin NT Australia
- Flora and Fauna Division Department of Environment and Natural Resources Northern Territory Government Darwin NT Australia
| | - Danielle Stokeld
- Flora and Fauna Division Department of Environment and Natural Resources Northern Territory Government Darwin NT Australia
| | - Luke D. Einoder
- Flora and Fauna Division Department of Environment and Natural Resources Northern Territory Government Darwin NT Australia
| | - Hugh F. Davies
- NESP Threatened Species Recovery Hub Research Institute for the Environment and Livelihoods Charles Darwin University Darwin NT Australia
| | - Alaric Fisher
- NESP Threatened Species Recovery Hub Research Institute for the Environment and Livelihoods Charles Darwin University Darwin NT Australia
- Flora and Fauna Division Department of Environment and Natural Resources Northern Territory Government Darwin NT Australia
| | - Brydie M. Hill
- Flora and Fauna Division Department of Environment and Natural Resources Northern Territory Government Darwin NT Australia
| | - Terry Mahney
- Flora and Fauna Division Department of Environment and Natural Resources Northern Territory Government Darwin NT Australia
| | - Brett P. Murphy
- NESP Threatened Species Recovery Hub Research Institute for the Environment and Livelihoods Charles Darwin University Darwin NT Australia
| | - Alys Stevens
- Warddeken Land Management Limited Darwin NT Australia
| | - John C. Z. Woinarski
- NESP Threatened Species Recovery Hub Research Institute for the Environment and Livelihoods Charles Darwin University Darwin NT Australia
| | | | | | - Graeme R. Gillespie
- Flora and Fauna Division Department of Environment and Natural Resources Northern Territory Government Darwin NT Australia
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