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RESEARCH ARTICLE
Contents Vol 35(7)

Diets of native and introduced mammalian herbivores in shrub-encroached grassy woodland, south-eastern Australia

Naomi E. Davis A C , Graeme Coulson A and David M. Forsyth A B
+ Author Affiliations
- Author Affiliations

A Department of Zoology, The University of Melbourne, Vic. 3010, Australia.

B Arthur Rylah Institute for Environmental Research, Department of Sustainability and Environment, 123 Brown Street, Heidelberg, Vic. 3084, Australia.

C Corresponding author. Email: ndavis@unimelb.edu.au

Wildlife Research 35(7) 684-694 https://doi.org/10.1071/WR08042
Submitted: 13 March 2008  Accepted: 30 July 2008   Published: 17 November 2008

Abstract

Effective management of sympatric mammalian herbivore populations requires an understanding of interspecific interactions. At Wilsons Promontory National Park, Victoria, sympatric native and introduced mammalian herbivores are thought to be contributing to modification of shrub-encroached Coastal Grassy Woodland. We estimated the diets of the five terrestrial mammalian herbivore species present using microhistological techniques. The diets of introduced hog deer (Axis porcinus) and native swamp wallabies (Wallabia bicolor) consisted mainly of dicots. The diet of introduced European rabbits (Oryctolagus cuniculus) contained similar proportions of monocots and dicots. The diets of native eastern grey kangaroos (Macropus giganteus) and native common wombats (Vombatus ursinus) consisted mainly of monocots but kangaroos also consumed moderate amounts of dicots. Deer and wallabies consumed more native plants than did the other species and rabbits consumed more exotic plants than did all other species except kangaroos. Diet breadth was narrowest for kangaroos and broadest for swamp wallabies and hog deer. Overlap in food use by the five herbivores was high, particularly between deer and wallabies, and between kangaroos and both rabbits and wombats. Our results suggest that the potential impacts of native and introduced species on the vegetation of Coastal Grassy Woodland are similar, and that the entire herbivore assemblage will need to be managed to increase fine fuel loads if fire is used as a restoration tool.


Acknowledgements

This research was funded by Parks Victoria (Research Partners Program) and the Holsworth Wildlife Endowment. We thank the following Parks Victoria staff for their invaluable assistance: Matt Hoskins, Elaine Thomas, Mick Keenan, Jim Whelan, Dan Jones and the late Stuart Judd. Ron Mayze (Para Park Co-Operative Game Reserve) and the late Geoff Moore (Australian Deer Research Foundation) shared their deer expertise. Grant Norbury and Jac Cutter provided advice on dietary analysis and David Meagher identified mosses. We thank Mick Keough for statistical advice and we thank Andrea Taylor and two anonymous reviewers for comments on previous versions of this manuscript. Stomach sampling was conducted under Research permit 10002857, National Parks Act 1975 and Wildlife Act 1975 and plants were collected under Research Permit 10002450 of the Wildlife Act 1975, Flora and Fauna Guarantee Act 1988 and National Parks Act 1975.


References

Australian National Parks and Wildlife Service (1995). Code of practice for the humane shooting of kangaroos. Australian National Parks and Wildlife Service, Canberra.

Bachelet, D. , Lenihan, J. M. , Daly, C. , and Neilson, R. P. (2000). Interactions between fire, grazing and climate change at Wind Cave National Park, SD. Ecological Modelling 134, 229–244.
| Crossref | GoogleScholarGoogle Scholar | CAS | Bentley A. (1998). ‘An Introduction to the Deer of Australia with Special Reference to Victoria.’ 3rd edn. (Australian Deer Research Foundation Ltd: Melbourne.)

Bridle, K. , and Kirkpatrick, J. (1999). Comparative effects of stock and wild vertebrate herbivore grazing on treeless subalpine vegetation, Eastern Central Plateau, Tasmania. Australian Journal of Botany 47, 817–834.
| Crossref | GoogleScholarGoogle Scholar | Chesterfield E. , Trumbull-Ward A. , Hopmans P. , and Whelan J. (1995). Early changes in vegetation from a grazing trial on Yanakie Isthmus, Wilsons Promontory National Park. Department of Conservation and Natural Resources, Melbourne.

Clarke, K. R. (1993). Non-parametric multivariate analyses of changes in community structure. Australian Journal of Ecology 18, 117–143.
| Crossref | GoogleScholarGoogle Scholar | Davies J. B. , and Oates A. M. (1999). Ecological Vegetation Class (EVC) mapping of Wilsons Promontory and adjacent islands. Department of Natural Resources and Environment, Melbourne.

Dawson T. J. (1989). Diets of macropodoid marsupials: general patterns and environmental influences. In ‘Kangaroos, Wallabies and Rat-kangaroos’. (Eds G. Grigg, P. Jarman and I. Hume.) pp. 129–142. (Surrey Beatty: Sydney.)

Dawson, T. J. , and Ellis, B. A. (1996). Diets of mammalian herbivores in Australian arid shrublands: seasonal effects on overlap between euros, sheep and feral goats, and on dietary niche breadths and electivities. Journal of Arid Environments 34, 491–506.
| Crossref | GoogleScholarGoogle Scholar | Department of Sustainability and Environment (2005). Advisory list of rare or threatened plants in Victoria – 2005. Department of Sustainability and Environment, Melbourne.

Edwards G. (1969). Some aspects of the ecology of the swamp wallaby, Wallabia bicolor. Ph.D. Thesis, Monash University, Melbourne.

Evans, M. C. , and Jarman, P. J. (1999). Diets and feeding selectivities of bridled nailtail wallabies and black-striped wallabies. Wildlife Research 26, 1–19.
| Crossref | GoogleScholarGoogle Scholar | CAS | Gause G. F. (1934). ‘The Struggle for Existence.’ (Williams and Wilkins: Baltimore.)

Hobbs, N. T. (1996). Modification of ecosystems by ungulates. Journal of Wildlife Management 60, 695–713.
| Crossref | GoogleScholarGoogle Scholar | Holland K. D. , and Williams N. S. G. (2005). Vegetation change, fire and herbivory on Yanakie Isthmus, Wilsons Promontory National Park. Report prepared for Parks Victoria. Australian Research Centre for Urban Ecology, Melbourne.

Hood G. M. (2005). PopTools. CSIRO. <http://www.cse.csiro.au/poptools/>;. Accessed 3 February 2008.

Horn, H. S. (1966). Measurement of “overlap” in comparative ecological studies. American Naturalist 100, 419–424.
| Crossref | GoogleScholarGoogle Scholar | Hume I. D. (1999). ‘Marsupial Nutrition.’ (Cambridge University Press: Cambridge.)

Hunt, L. P. (2001). Heterogeneous grazing causes local extinction of edible perennial shrubs: a matrix analysis. Journal of Applied Ecology 38, 238–252.
| Crossref | GoogleScholarGoogle Scholar | Jarman P. J. , and Phillips C. M. (1988). Diets in a community of macropod species. In ‘Kangaroos, Wallabies and Rat-kangaroos’. (Eds G. Grigg, P. Jarman and I. Hume.) pp. 143–149. (Surrey Beatty: Sydney.)

Judd T. S. (1990). The ecology and water relations of the invasive shrubs, Kunzea ambigua (sm.) druce, Kunzea ericoides (A. Rich) J. Thompson and Leptospermum laevigatum (J. Gaertn) F. Muell. Ph.D. Thesis, The University of Melbourne.

Leigh, J. H. , Wood, D. H. , Slee, A. V. , and Holgate, M. D. (1991). The effects of burning and simulated grazing on productivity, forage quality, mortality and flowering of eight subalpine herbs in Kosciusko National Park. Australian Journal of Botany 39, 97–118.
| Crossref | GoogleScholarGoogle Scholar | Levins R. (1968). ‘Evolution in Changing Environments: Some Theoretical Explorations.’ (Princeton University Press: Princeton.)

Lunt, I. D. (1998). Allocasuarina (Casuarinaceae) invasion of an unburnt coastal woodland at Ocean Grove, Victoria: structural changes 1971–1996. Australian Journal of Botany 46, 649–656.
| Crossref | GoogleScholarGoogle Scholar | Quinn G. P. , and Keough M. J. (2003). ‘Experimental Design and Data Analysis for Biologists.’ (Cambridge University Press: Cambridge.)

Rohner, C. , and Ward, D. (1997). Chemical and mechanical defense against herbivory in two sympatric species of desert Acacia. Journal of Vegetation Science 8, 717–726.
| Crossref | GoogleScholarGoogle Scholar | Taylor P. G. (1971). Aspects of the biology of the hog deer (Axis porcinus Zimmerman 1780). Ph.D. Thesis, Monash University, Melbourne.

Taylor, R. J. (1983). The diet of the eastern grey kangaroo and wallaroo in areas of improved and native pasture in the New England Tablelands. Australian Wildlife Research 10, 203–211.
| Crossref | GoogleScholarGoogle Scholar | University of Ballarat (1999). Assessment of the condition of vegetation on the Yanakie Isthmus, Wilsons Promontory National Park. Report prepared for Parks Victoria. University of Ballarat, Victoria.

Van Langevelde, F. , Van de Vijver, C. A. D. M. , Van de Koppel, J. , De Ridder, N. , and Van Andel, J. , et al. (2003). Effects of fire and herbivory on the stability of savanna ecosystems. Ecology 84, 337–350.
| Crossref | GoogleScholarGoogle Scholar | Williams K. , Parer I. , Coman B. , Burley J. , and Braysher M. (1995). ‘Managing Vertebrate Pests: Rabbits.’ (Bureau of Rural Sciences: Canberra.)

Williams, R. J. (1990). Cattle grazing within subalpine heathland and grassland communities on the Bogong High Plains: disturbance, regeneration and the shrub–grass balance. Proceedings of the Ecological Society of Australia 16, 255–265.


Wilson, A. (1990). The effect of grazing on Australian ecosystems. Proceedings of the Ecological Society of Australia 16, 235–244.


Woolnough, A. P. , and Johnson, C. N. (2000). Assessment of the potential for competition between two sympatric herbivores – the northern hairy-nosed wombat, Lasiorhinus krefftii, and the eastern grey kangaroo, Macropus giganteus. Wildlife Research 27, 301–308.
| Crossref | GoogleScholarGoogle Scholar |

Yamauchi, A. , and Yamamura, N. (2004). Herbivory promotes plant production and reproduction in nutrient-poor conditions: effects of plant adaptive phenology. American Naturalist 163, 138–153.
| Crossref | GoogleScholarGoogle Scholar | PubMed |

Yates, C. J. , and Hobbs, R. J. (1997). Temperate eucalypt woodlands: a review of their status, processes threatening their persistence and techniques for restoration. Australian Journal of Botany 45, 949–973.
| Crossref | GoogleScholarGoogle Scholar |

Zavaleta, E. S. , Hobbs, R. J. , and Mooney, H. A. (2001). Viewing invasive species removal in a whole-ecosystem context. Trends in Ecology & Evolution 16, 454–459.
| Crossref | GoogleScholarGoogle Scholar |