Do kangaroos exhibit water-focused grazing patterns in arid New South Wales? A case study in Sturt National Park.

The density of kangaroos (Macropus spp.) within 5 km of current and former artificial watering points in Sturt National Park (NSW) was studied over a two-year period using the line transect method. Kangaroo densities were not significantly related to water proximity and did not significantly differ between open and closed watering points. Infrared sensors detected and counted kangaroo movements to and from artificial watering points and these were positively correlated with temperature. However, line transect counts did not reveal a shift in kangaroo distributions to water-proximate areas in warmer seasons. The results suggest that kangaroos travel to drink and then return to relatively stable home ranges that take advantage of sites offering the best grazing and resting opportunities. Vegetation surveys, using a wheel point device, revealed that the biomass of Atriplex spp. decreased significantly with increased proximity to artificial watering points, but the biomass of Poaceae spp. and numerous forbs did not. Vegetative diversity was unrelated to water proximity. Low vegetation biomass near artificial watering points in Sturt National Park may be more correctly attributed to the effects from past sheep-grazing pressure, than to any current grazing pressure. The implications of artificial watering point closure on conservation values and nature-based tourism are discussed.

[1]  R. Meissner,et al.  Effects of sheep exclusion on the soil seed bank and annual vegetation in chenopod shrublands of South Australia , 1999 .

[2]  D. Croft,et al.  Body condition of the red kangaroo (Macropus rufus) in arid Australia: The effect of environmental condition, sex and reproduction , 1999 .

[3]  I. Thrash.  Impact of water provision on herbaceous vegetation in Kruger National Park, South Africa , 1998 .

[4]  I. Thrash.  Impact of large herbivores at artificial watering points compared to that at natural watering points in Kruger National Park, South Africa , 1998 .

[5]  S. Milton,et al.  Simulated pattern formation around artificial waterholes in the semi‐arid Kalahari , 1997 .

[6]  I. Thrash.  Infiltration rate of soil around drinking troughs in the Kruger National Park, South Africa , 1997 .

[7]  J. Stol,et al.  Spatial Distribution of Sheep, Feral Goats and Kangaroos in Woody Rangeland Paddocks. , 1996 .

[8]  David R. Anderson,et al.  Distance Sampling: Estimating Abundance of Biological Populations , 1995 .

[9]  G. K. Theron,et al.  Dry season herbivore densities around drinking troughs in the Kruger National Park , 1995 .

[10]  T. Dawson,et al.  Diets of mammalian herbivores in Australian arid shrublands: seasonal effects on overlap between red kangaroos, sheep and rabbits and on dietary niche breadths and electivities , 1994 .

[11]  W. Ernst,et al.  Nutrients in soil and vegetation around two artificial waterpoints in eastern Botswana , 1987 .

[12]  R. Lange,et al.  Development of a new piosphere in arid chenopod shrubland grazed by sheep. 2. Changes to the vegetation , 1986 .

[13]  C. R. Taylor,et al.  Energetic Cost of Locomotion in Kangaroos , 1973, Nature.

[14]  R. Lange,et al.  The Piosphere: Sheep Track and Dung Patterns. , 1969 .

[15]  K. Valentine.  Distance from Water as a Factor in Grazing Capacity of Rangeland , 1947 .

[16]  D. Freudenberger,et al.  The Effect of Temporary Closure of Watering Points on Grazing Intensity of Red and Grey Kangaroos With Related Observations on Feral Goats. , 1997 .

[17]  C. James,et al.  The effects of artificial sources of water on rangeland biodiversity: Final report to the Biodiversity Convention and Strategy Section of the Biodiversity Group, Environment Australia , 1997 .

[18]  D. Freudenberger,et al.  The Effect of Short-Term Exclosure of Watering Points on the Behaviour and Harvesting Efficiency of Grey and Red Kangaroos. , 1997 .

[19]  J. Holechek,et al.  Grazing influences on watering point vegetation in the Chihuahuan desert. , 1995 .

[20]  D. Norbury,et al.  The Distribution of Red Kangaroos in Relation to Range Regeneration. , 1993 .

[21]  D. Croft.  Home range of the red kangaroo Macropus rufus , 1991 .

[22]  Jeff Short.  Factors affecting food intake of rangelands herbivores , 1987 .

[23]  A. Newsome.  The distribution of red kangaroos, Megaleia rufa (Desmarest), about sources of persistent food and water in central Australia. , 1965 .

[24]  H. Frith.  Mobility of the Red Kangaroo, Megaleia rufa , 1964 .

[25]  C. Tidmarsh,et al.  The wheel-point method of survey and measurement of semi-open grasslands and Karoo vegetation in South Africa. , 1955 .