1. CSIRO Land and Water; PO Box 2111 Alice Springs NT 0871 Australia
2. CSIRO Land and Water; PMB Aitkenvale QLD 4814 Australia
3. Natural Resources, Department of Environment, Water and Natural Resources; PO Box 78 Port Augusta SA 5001 Australia
4. Desert Ecology Research Group, School of Biological Sciences; University of Sydney; Sydney NSW 2006 Australia
5. Flora and Fauna Division, Department of Land Resource Management; PO Box 1120 Alice Springs NT 0871 Australia
6. School of Earth and Environmental Sciences; University of Adelaide; Adelaide SA 5005 Australia