1. Landscape Ecology and Conservation Group; Centre for Spatial Environmental Research; School of Geography, Planning and Environmental Management; The University of Queensland; Brisbane Qld 4072 Australia
2. Institute for Applied Ecology; The University of Canberra; Bruce; ACT 2617 Australia
3. Department of Sustainability & Environment; Arthur Rylah Institute for Environmental Research; Heidelberg Vic. 3084 Australia
4. The Australian Centre for Sustainable Catchments; University of Southern Queensland; Toowoomba Qld 4350 Australia