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Journal of the Australian Rangeland Society
RESEARCH ARTICLE

Cattle removal in arid Australia benefits kangaroos in high quality habitat but does not affect camels

Anke S. K. Frank A B C , Glenda M. Wardle A , Aaron C. Greenville A and Chris R. Dickman A
+ Author Affiliations
- Author Affiliations

A Desert Ecology Research Group, School of Life and Environmental Sciences, The University of Sydney, NSW 2006, Australia.

B School of Biological Sciences, University of Tasmania, Sandy Bay, Tas. 7001, Australia.

C Corresponding author. Email: anke.frank@utas.edu.au

The Rangeland Journal 38(1) 73-84 https://doi.org/10.1071/RJ15039
Submitted: 8 May 2015  Accepted: 11 January 2016   Published: 18 February 2016

Abstract

Removing cattle as a management tool to conserve biodiversity may not necessarily alter grazing impacts on vegetation if other introduced or native herbivores move in and replace the cattle after removal. This study investigated whether there was a difference in the abundance of native red kangaroos (Osphranter (Macropus) rufus) and introduced feral camels (Camelus dromedarius) on arid rangelands where cattle had been recently removed compared with where cattle remained. Activity was measured by clearing and weighing dung, and by counting animal sightings. Kangaroos were encountered more frequently in high quality habitat (gidgee woodland) where cattle had been recently removed. However, kangaroo dung in newly cattle-free areas comprised only ~1.5% of the weight of cattle dung in this habitat where cattle still grazed, indicating no grazing compensation by the native herbivore. Camels showed no clear preference for particular habitat types but used dune tops usually avoided by kangaroos and cattle. There was no indication of camels using habitats differently in areas where cattle were removed. Camel dung collected across all habitats comprised less than a tenth the weight of cattle dung, but almost five times as much as kangaroo dung. As cattle removal had occurred relatively recently, further monitoring is needed to determine its impact over longer periods, especially through low and high rainfall cycles. Methods to improve the monitoring of large herbivores in the presence and absence of livestock and to assess whether anticipated conservation goals are achieved are discussed.

Additional keywords: arid rangelands, grazing ecology, grazing management, grazing pressure, rangeland management.


References

Bayliss, P. (1987). Kangaroo dynamics. In: ‘Kangaroos – Their Ecology and Management in the Sheep Rangelands of Australia’. (Eds G. Caughley, N. Shepherd and J. Short) pp. 119–134. (Cambridge University Press: Cambridge, UK.)

Beringer, J., Millspaugh, J. J., Sartwell, J., and Woede, R. (2004). Real-time video recording of food selection by captive white-tailed deer. Wildlife Society Bulletin 32, 648–654.
Real-time video recording of food selection by captive white-tailed deer.Crossref | GoogleScholarGoogle Scholar |

Bignell, D. E., and Eggleton, P. (2000). Termites in ecosystems. In: ‘Termites: Evolution, Sociality, Symbioses, Ecology’. (Eds T. Abe, D. E. Bignell and M. Higaski.) pp. 262–387. (Kluwer Academic Publishers: Dordrecht, The Netherlands.)

Bonython, C. W. (1980). ‘Walking the Simpson Desert.’ (Rigby: Adelaide, SA.)

Branson, D. H., and Haferkamp, M. A. (2014). Insect herbivory and vertebrate grazing impact food limitation and grasshopper populations during a severe outbreak. Ecological Entomology 39, 371–381.
Insect herbivory and vertebrate grazing impact food limitation and grasshopper populations during a severe outbreak.Crossref | GoogleScholarGoogle Scholar |

Cease, A. J., Elser, J. J., Ford, C. F., Hao, S., Kang, L., and Harrison, J. F. (2012). Heavy livestock grazing promotes locust outbreaks by lowering plant nitrogen content. Science 335, 467–469.
Heavy livestock grazing promotes locust outbreaks by lowering plant nitrogen content.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC38XhtFajsbY%3D&md5=1c5ca7f7d73d7633e96a44ee36c5d2acCAS | 22282812PubMed |

Chippendale, G. (1962). Botanical examination of kangaroo stomach contents and cattle rumen contents. Australian Journal of Science 25, 21–22.

Coventry, J., Edwards, G., and Zeng, B. (2010). The odyssey of managing feral camels and their impacts–is there an Achilles’ heel? Australian Zoologist 35, 251–264.
The odyssey of managing feral camels and their impacts–is there an Achilles’ heel?Crossref | GoogleScholarGoogle Scholar |

Dawson, T. J. (1995). ‘Kangaroos. Biology of the Largest Marsupials.’ (University of New South Wales Press Ltd: Sydney, NSW.)

Dickman, C. R., Mahon, P. S., Masters, P., and Gibson, D. F. (1999). Long-term dynamics of rodent populations in arid Australia: the influence of rainfall. Wildlife Research 26, 389–403.
Long-term dynamics of rodent populations in arid Australia: the influence of rainfall.Crossref | GoogleScholarGoogle Scholar |

Ditchkoff, S. S., Raglin, J. B., Smith, J. M., and Collier, B. A. (2005). Capture of white-tailed deer fawns using thermal imaging technology. Wildlife Society Bulletin 33, 1164–1168.
Capture of white-tailed deer fawns using thermal imaging technology.Crossref | GoogleScholarGoogle Scholar |

Dörges, B., and Heuke, J. (2003). ‘The Palatability of Central Australian Plant Species to Camels.’ Technote, 116. (Central Australian Camel Association: Alice Springs, NT.)

Drucker, A. G., Edwards, G. P., and Saalfeld, W. K. (2010). Economics of camel control in central Australia. The Rangeland Journal 32, 117–127.
Economics of camel control in central Australia.Crossref | GoogleScholarGoogle Scholar |

Dudzinski, M. L., Lowe, W. A., Muller, W. J., and Low, B. S. (1982). Joint use of habitat by red kangaroos and shorthorn cattle in arid central Australia. Australian Journal of Ecology 7, 69–74.
Joint use of habitat by red kangaroos and shorthorn cattle in arid central Australia.Crossref | GoogleScholarGoogle Scholar |

Edwards, G. P., Croft, D. B., and Dawson, T. J. (1996). Competition between red kangaroos (Macropus rufus) and sheep (Ovis aries) in the arid rangelands of Australia. Austral Ecology 21, 165–172.
Competition between red kangaroos (Macropus rufus) and sheep (Ovis aries) in the arid rangelands of Australia.Crossref | GoogleScholarGoogle Scholar |

Edwards, G. P., Saalfeld, K., and Clifford, B. (2004a). Population trend of feral camels in the Northern Territory, Australia. Wildlife Research 31, 509–517.
Population trend of feral camels in the Northern Territory, Australia.Crossref | GoogleScholarGoogle Scholar |

Edwards, G. P., Pople, A. R., Saalfeld, K., and Caley, P. (2004b). Introduced mammals in Australian rangelands: future threats and the role of monitoring programmes in management strategies. Austral Ecology 29, 40–50.
Introduced mammals in Australian rangelands: future threats and the role of monitoring programmes in management strategies.Crossref | GoogleScholarGoogle Scholar |

Edwards, G. P., Zeng, B., Saafeld, W. K., and Vaarzan-Morel, P. (2010). Evaluation of the impacts of feral camels. The Rangeland Journal 32, 43–54.
Evaluation of the impacts of feral camels.Crossref | GoogleScholarGoogle Scholar |

Fisher, A. (2005). ‘Management of Total Grazing Pressure: Managing for Biodiversity in the Rangelands.’ (Department of the Environment and Heritage: Canberra, ACT.)

Fisher, A., Hunt, L., James, C., Landsberg, J., Phelps, D., Smyth, A., and Watson, I. (2004). ‘Review of Total Grazing Pressure Management Issues and Priorities for Biodiversity Conservation in Rangelands: A Resource to Aid NRM Planning.’ Desert Knowledge CRC Project Report No. 3 (August 2004). (Desert Knowledge CRC and Tropical Savannas Management CRC: Alice Springs, NT.)

Fleischner, T. L. (1994). Ecological costs of livestock grazing in western North America. Conservation Biology 8, 629–644.
Ecological costs of livestock grazing in western North America.Crossref | GoogleScholarGoogle Scholar |

Folk, R. L. (1971). Longitudinal dunes of the north-western edge of the Simpson Desert, Northern Territory, Australia, 1. Geomorphology and grain size relationships. Sedimentology 16, 5–54.
Longitudinal dunes of the north-western edge of the Simpson Desert, Northern Territory, Australia, 1. Geomorphology and grain size relationships.Crossref | GoogleScholarGoogle Scholar |

Frank, A. S. K. (2010). The ecological impacts of cattle grazing within spinifex grasslands and gidgee woodlands in the Simpson Desert, central Australia. PhD Thesis, The University of Sydney, Australia.

Frank, A. S. K., Dickman, C. R., and Wardle, G. M. (2012). Habitat use and behaviour of cattle in a heterogeneous desert environment in central Australia. The Rangeland Journal 34, 319–328.
Habitat use and behaviour of cattle in a heterogeneous desert environment in central Australia.Crossref | GoogleScholarGoogle Scholar |

Frank, A. S. K., Dickman, C. R., Wardle, G. M., and Greenville, A. C. (2013). Interactions of grazing history, cattle removal and time since rain drive divergent short-term responses by desert biota. PLoS One 8, e68466.
Interactions of grazing history, cattle removal and time since rain drive divergent short-term responses by desert biota.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXht1Sgsr3K&md5=89933cd6aa44cdd1f7d7a2e3c48cdb7cCAS |

Frank, A. S. K., Wardle, G. M., Dickman, C. R., and Greenville, A. C. (2014). Habitat- and rainfall-dependent biodiversity responses to cattle removal in an arid woodland–grassland environment. Ecological Applications 24, 2013–2028.
Habitat- and rainfall-dependent biodiversity responses to cattle removal in an arid woodland–grassland environment.Crossref | GoogleScholarGoogle Scholar |

Frith, H. J., and Calaby, J. H. (1969). ‘Kangaroos.’ (F. W. Cheshire: Melbourne.)

Fukuda, Y., McCallum, H. I., Grigg, G. C., and Pople, A. R. (2009). Fencing artificial waterpoints failed to influence density and distribution of red kangaroos (Macropus rufus). Wildlife Research 36, 457–465.
Fencing artificial waterpoints failed to influence density and distribution of red kangaroos (Macropus rufus).Crossref | GoogleScholarGoogle Scholar |

Gómez, J. M., and Gonzaález-Megias, A. (2007). Long-term effects of ungulates on phytophagous insects. Ecological Entomology 32, 229–234.

Gowans, S. A., Gibson, M. S., Westbrooke, M. E., and Pegler, P. (2010). Changes in vegetation condition following kangaroo population management in Wyperfield National Park. In: Macropodids: the Biology of Kangaroos, Wallabies and Rat-kangaroos’. (Eds G. Coulson and M. Eldridge.) pp. 361–370. (CSIRO Publishing: Melbourne.)

Greenville, A. C., Wardle, G. M., and Dickman, C. R. (2012). Extreme climatic events drive mammal irruptions: regression analysis of 100-year trends in desert rainfall and temperature. Ecology and Evolution 2, 2645–2658.
Extreme climatic events drive mammal irruptions: regression analysis of 100-year trends in desert rainfall and temperature.Crossref | GoogleScholarGoogle Scholar | 23170202PubMed |

Kutt, A. S., and Gordon, I. J. (2012). Variation in terrestrial mammal abundance on pastoral and conservation land tenures in north-eastern Australian tropical savannas. Animal Conservation 15, 416–425.
Variation in terrestrial mammal abundance on pastoral and conservation land tenures in north-eastern Australian tropical savannas.Crossref | GoogleScholarGoogle Scholar |

Kutt, A. S., and Woinarski, J. C. Z. (2007). The effects of grazing and fire on vegetation and the vertebrate assemblage in a tropical savanna woodland in north-eastern Australia. Journal of Tropical Ecology 23, 95–106.
The effects of grazing and fire on vegetation and the vertebrate assemblage in a tropical savanna woodland in north-eastern Australia.Crossref | GoogleScholarGoogle Scholar |

Lamb, D. S., Saalfeld, W. K., McGregor, M. J., Zeng, B., and Vaarzon-Morel, P. (2010). A GIS-based decision-making structure for managing the impacts of feral camels in Australia. The Rangeland Journal 32, 129–143.
A GIS-based decision-making structure for managing the impacts of feral camels in Australia.Crossref | GoogleScholarGoogle Scholar |

Landsberg, J., and Stol, J. (1996). Spatial distribution of sheep, feral goats and kangaroos in woody rangeland paddocks. The Rangeland Journal 18, 270–291.
Spatial distribution of sheep, feral goats and kangaroos in woody rangeland paddocks.Crossref | GoogleScholarGoogle Scholar |

Legge, S., Kennedy, M. S., Lloyd, R., Murphy, S. A., and Fisher, A. (2011). Rapid recovery of mammal fauna in the central Kimberley, northern Australia, following the removal of introduced herbivores. Austral Ecology 36, 791–799.
Rapid recovery of mammal fauna in the central Kimberley, northern Australia, following the removal of introduced herbivores.Crossref | GoogleScholarGoogle Scholar |

Lethbridge, M. R., Anderson, N., and Harper, M. C. (2010). Movements and landscape use of camels in central Australia revealed by GPS satellite. The Rangeland Journal 32, 33–41.
Movements and landscape use of camels in central Australia revealed by GPS satellite.Crossref | GoogleScholarGoogle Scholar |

Letnic, M. (2004). Cattle grazing in a hummock grassland regenerating after fire: the short-term effects of cattle exclusion on vegetation in south-western Queensland. The Rangeland Journal 26, 34–48.
Cattle grazing in a hummock grassland regenerating after fire: the short-term effects of cattle exclusion on vegetation in south-western Queensland.Crossref | GoogleScholarGoogle Scholar |

Letnic, M. (2007). The impacts of pastoralism on the fauna of arid Australia. In: ‘Animals of Arid Australia: Out on their Own?’. (Eds C. Dickman, D. Lunney and S. Burgin.) pp. 65–75. (Royal Zoological Society of New South Wales: Mosman, NSW.)

Letnic, M., and Dickman, C. R. (2006). Boom means bust: interactions between the El Niño/Southern Oscillation (ENSO), rainfall and the processes threatening mammal species in arid Australia. Biodiversity and Conservation 15, 3847–3880.
Boom means bust: interactions between the El Niño/Southern Oscillation (ENSO), rainfall and the processes threatening mammal species in arid Australia.Crossref | GoogleScholarGoogle Scholar |

Letnic, M., Ritchie, E. G., and Dickman, C. R. (2012). Top predators as biodiversity regulators: the dingo Canis lupus dingo as a case study. Biological Reviews of the Cambridge Philosophical Society 87, 390–413.
Top predators as biodiversity regulators: the dingo Canis lupus dingo as a case study.Crossref | GoogleScholarGoogle Scholar | 22051057PubMed |

Letnic, M., Webb, J. K., Jessop, T. S., Florance, D., and Dempster, T. (2014). Artificial water points facilitate the spread of an invasive vertebrate in arid Australia. Journal of Applied Ecology 51, 795–803.
Artificial water points facilitate the spread of an invasive vertebrate in arid Australia.Crossref | GoogleScholarGoogle Scholar |

Long, J. L. (2003). ‘Introduced Mammals of the World: their History, Distribution and Influence.’ (CSIRO Publishing: Melbourne.)

Lunt, I. D., Eldridge, D. J., Morgan, J. W., and Bradd Wit, G. (2007). A framework to predict the effects of livestock grazing and grazing exclusion on conservation values in natural ecosystems in Australia. Australian Journal of Botany 55, 401–415.
A framework to predict the effects of livestock grazing and grazing exclusion on conservation values in natural ecosystems in Australia.Crossref | GoogleScholarGoogle Scholar |

Madhusudan, M. D. (2004). Recovery of wild large herbivores following livestock decline in a tropical Indian wildlife reserve. Journal of Applied Ecology 41, 858–869.
Recovery of wild large herbivores following livestock decline in a tropical Indian wildlife reserve.Crossref | GoogleScholarGoogle Scholar |

Millspaugh, J. J., Sartwell, J., Gitzen, R. A., Moll, R. J., and Beringer, J. (2008). A pragmatic view of animal-borne video technology. Trends in Ecology & Evolution 23, 294–295.
A pragmatic view of animal-borne video technology.Crossref | GoogleScholarGoogle Scholar |

Moll, R. J., Millpoaugh, J. J., Beringer, J., Sartwell, J., and He, Z. (2007). A new ‘view’ of ecology and conservation through animal-borne video systems. Trends in Ecology & Evolution 22, 660–668.
A new ‘view’ of ecology and conservation through animal-borne video systems.Crossref | GoogleScholarGoogle Scholar |

Moll, R. J., Millpoaugh, J. J., Beringer, J., Sartwell, J., He, Z., Eggert, J. A., and Zhao, X. (2009). A terrestrial animal-borne video system for large mammals. Computers and Electronics in Agriculture 66, 133–139.
A terrestrial animal-borne video system for large mammals.Crossref | GoogleScholarGoogle Scholar |

Montague-Drake, R., and Croft, D. B. (2004). Do kangaroos exhibit water-focused grazing patterns in arid New South Wales? A case study in Sturt National Park. Australian Mammalogy 26, 87–100.

Newsome, A. E. (1965). The abundance of red kangaroos, Megaleia rufa (Desmarest), in central Australia. Australian Journal of Zoology 13, 269–287.
The abundance of red kangaroos, Megaleia rufa (Desmarest), in central Australia.Crossref | GoogleScholarGoogle Scholar |

Newsome, A. E. (1966). The influence of food on breeding in the red kangaroo in central Australia. CSIRO Wildlife Research 11, 187–196.
The influence of food on breeding in the red kangaroo in central Australia.Crossref | GoogleScholarGoogle Scholar |

Newsome, A. E. (1971). Competition between wildlife and domestic livestock. Australian Veterinary Journal 47, 577–586.
Competition between wildlife and domestic livestock.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DyaE38%2FptlKisg%3D%3D&md5=3c36e6980307a8835af4deb2b9ffce15CAS | 5167668PubMed |

Newsome, A. E. (1975). Ecological comparison of two arid-zone kangaroos of Australia, and their anomalous prosperity since introduction of ruminant stock to their environment. The Quarterly Review of Biology 50, 389–424.
Ecological comparison of two arid-zone kangaroos of Australia, and their anomalous prosperity since introduction of ruminant stock to their environment.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DyaE287lt1yqug%3D%3D&md5=7fed9d2e966e25ba33f3e5914629f343CAS | 1221459PubMed |

Noble, J. C., and Grice, A. C. (2002). Fires regimes in semi-arid and tropical pastoral lands: managing biological diversity and ecosystem function. In: ‘Flammable Australia: The Fire Regimes and Biodiversity of a Continent’. (Eds R. A. Bradstock, J. E. Williams and A. M. Gill.) pp. 373–400. (Cambridge University Press: Cambridge, UK.)

Nolan, C. (2003). ‘Sand Hills and Channel Country.’ (Diamantina Shire Council: Bedourie, Qld.)

Nuñez, M., Bailey, J., and Schweitzer, J. (2010). Population, community and ecosystem effects of exotic herbivores: a growing global concern. Biological Invasions 12, 297–301.
Population, community and ecosystem effects of exotic herbivores: a growing global concern.Crossref | GoogleScholarGoogle Scholar |

Phillips, A., Heuche, J., Dorges, B., and Reilly, G. (2001). ‘Co-grazing cattle and camels.’ A Report for the Rural Industries Research and Development Corporation. (Rural Industries Research and Development Corporation: Kingston, ACT.)

Pinaud, D. (2008). Quantifying search effort of moving animals at several spatial scales using first-passage time analysis: effect of the structure of environment and tracking systems. Journal of Applied Ecology 45, 91–99.
Quantifying search effort of moving animals at several spatial scales using first-passage time analysis: effect of the structure of environment and tracking systems.Crossref | GoogleScholarGoogle Scholar |

Pople, T., and Froese, J. (2012). ‘Distribution, Abundance and Harvesting of Feral Goats in the Australian Rangelands 1984–2011.’ (Invasive Plants & Animals Science Biosecurity Queensland, Department of Employment, Economic Development & Innovation: Brisbane, Qld.)

Primack, R. B. (2010). ‘Essentials of Conservation Biology.’ 6th edn. (Sinauer: Sunderland, MA.)

Purdie, R. (1984). ‘Land Systems of the Simpson Desert Region.’ (CSIRO Division of Water and Land Resources: Melbourne.)

R Development Core Team (2009). R: a language and environment for statistical computing. Available at: www.R-project.org (accessed 4 August 2015).

Read, J. L., and Cunningham, R. (2010). Relative impacts of cattle grazing and feral animals on an Australian arid zone reptile and small mammal assemblage. Austral Ecology 35, 314–324.
Relative impacts of cattle grazing and feral animals on an Australian arid zone reptile and small mammal assemblage.Crossref | GoogleScholarGoogle Scholar |

Ripple, W. J., Newsome, T. M., Wolf, C., Dirzo, R., Everatt, K. T., Galetti, M., Hayward, M. W., Kerley, G. I. H., Levi, T., Lindsey, P. A., Macdonald, D. W., Malhi, Y., Painter, L. E., Sandom, C. J., Terborgh, J., and Van Valkenburgh, B. (2015). Collapse of the world’s largest herbivores. Science Advances 1, e1400103.
Collapse of the world’s largest herbivores.Crossref | GoogleScholarGoogle Scholar | 26601172PubMed |

Saalfeld, K., and Edwards, G. P. (2008). Ecology of feral camels in Australia. In: ‘Managing the Impacts of Feral Camels in Australia: A New Way of Doing Business’. DKCRC Report 47. (Eds G. P. Edwards, B. Zeng, W. K. Saalfeld, P. Vaarzon-Morel and M. McGregor.) pp. 9–34. (Desert Knowledge Cooperative Research Centre: Alice Springs, NT.) Available at: www.desertknowledgecrc.com.au/publications/contractresearch.html (accessed 15 February 2010).

Schlecht, E., Hulsebusch, C., Mahler, F., and Becker, K. (2004). The use of differentially corrected global positioning system to monitor activities of cattle at pasture. Applied Animal Behaviour Science 85, 185–202.
The use of differentially corrected global positioning system to monitor activities of cattle at pasture.Crossref | GoogleScholarGoogle Scholar |

Schmalz, H. J., Taylor, R. V., Johnson, T. N., Kennedy, P. L., DeBano, S. F., Newingham, B. A., and McDaniel, P. A. (2013). Soil morphologic properties and cattle stocking rate affect dynamic soil properties. Rangeland Ecology and Management 66, 445–453.
Soil morphologic properties and cattle stocking rate affect dynamic soil properties.Crossref | GoogleScholarGoogle Scholar |

Shephard, M. (1992). ‘The Simpson Desert – Natural History and Human Endeavour.’ (Reed Books: Chatswood, NSW.)

Short, J., Caughley, G., Grice, D., and Brown, S. (1988). The distribution and relative abundance of camels in Australia. Journal of Arid Environments 15, 91–97.

Sinclair, A. R. E., Fryxell, J. M., and Caughley, G. (2006). ‘Wildlife Ecology, Conservation and Management.’ (Blackwell Publishing: Oxford, UK.)

Stafford Smith, D. M., and Morton, S. R. (1990). A framework for the ecology of arid Australia. Journal of Arid Environments 18, 255–278.

Triggs, B. (2004). ‘Tracks, Scats and other Traces: A Field Guide to Australian Mammals.’ Revised edn. (Oxford University Press: Melbourne.)

Twidale, C. R. (1972). Evolution of sand dunes in the Simpson Desert, central Australia. Transactions of the Institute of British Geographers 56, 77–109.
Evolution of sand dunes in the Simpson Desert, central Australia.Crossref | GoogleScholarGoogle Scholar |

van Klink, R., van der Plas, F., van Noordwijk, C. G. E., WallisDeVries, M. F., and Olff, H. (2015). Effects of large herbivores on grassland arthropod diversity. Biological Reviews 90, 347–366.
Effects of large herbivores on grassland arthropod diversity.Crossref | GoogleScholarGoogle Scholar | 1:STN:280:DC%2BC2cjjslSqtQ%3D%3D&md5=7f4b9941ca2c627433d75c6966916aa7CAS | 24837856PubMed |

Vermeulen, C., Lejeune, P., Lisein, J., Sawadiga, P., and Bouche, P. (2013). Unmanned aerial survey of elephants. PLoS One 8, e54700.
Unmanned aerial survey of elephants.Crossref | GoogleScholarGoogle Scholar | 1:CAS:528:DC%2BC3sXivFGqsb4%3D&md5=0f731bf6749e6c057c2ff1f2a02f0402CAS | 23405088PubMed |

Wardle, G. M., Greenville, A. C., Frank, A. S. K., Tischler, M., Emery, N. J., and Dickman, C. R. (2015). Ecosystem risk assessment of Georgina gidgee woodlands in central Australia. Austral Ecology 40, 444–459.
Ecosystem risk assessment of Georgina gidgee woodlands in central Australia.Crossref | GoogleScholarGoogle Scholar |

Williams, O. B., and Calaby, J. H. (1985). The hot deserts of Australia. In: ‘Ecosystems of the World 12A: Hot Deserts and Arid Shrublands’. (Eds M. Evenari, I. Noy-Meir and D. W. Goodall.) pp. 269–312. (Elsevier Publishers: Amsterdam, The Netherlands.)

Wilson, P. R., and Purdie, R. (1990). Current land use. In: ‘Western Arid Region Land Use Study – Part VI’. (Eds P. R. Wilson, R. Purdie and C. R. Ahern.) pp. 99–106. (Division of Land Utilisation: Brisbane, Qld.)

Wittmer, H. U., Elbroch, L. M., and Marshall, A. J. (2013). Good intentions gone wrong: did conservation management threaten endangered huemul deer, Hippocamelus bisulcus, in the future Patagonia National Park? Oryx 47, 393–402.
Good intentions gone wrong: did conservation management threaten endangered huemul deer, Hippocamelus bisulcus, in the future Patagonia National Park?Crossref | GoogleScholarGoogle Scholar |

Zeng, B., and Edwards, G. P. (2010). Perceptions of pastoralists and conservation reserve managers on managing feral camels and their impacts. The Rangeland Journal 32, 63–72.
Perceptions of pastoralists and conservation reserve managers on managing feral camels and their impacts.Crossref | GoogleScholarGoogle Scholar |