Mapping the distribution of Parkinsonia aculeata in the Cape River catchment in north Queensland, Australia

R.A. LawesA, L.V. Whiteman and A.C. GriceA

CSIRO Sustainable Ecosystems, Davies Laboratory, Aitkenvale, Queensland 4814, Australia.

A CRC for Australian Weed Management.


Abstract

Effective and efficient weed management requires an understanding of the weed's distribution at catchment and regional scales. Approximately 1100 km of rivers and creeks of the Cape River catchment in north Queensland Australia were aerially surveyed for Parkinsonia aculeata in October 2002 to determine the distribution and extent of the weed in this catchment.

Parkinsonia aculeata is an important environmental weed of relevance to the grazing industry in Northern Australia. Graziers and government bodies expressed an interest in controlling the weed in the Cape River catchment and information on the weed's location and distribution were therefore required to plan the control strategies. P. aculeata were patchily distributed throughout the catchment. It was principally located in the southern reaches of the catchment along the two main rivers, the Cape and Campaspe. Fewer P. aculeata were observed along the tributaries. In general the weed was found either in, or in close proximity (<1 km) to, the riparian zone, where the riparian zone was defined as an area within 50 m of a river or creek. The basis for the current distribution and implications for control are considered.

 

Plant Protection Quarterly (2003) 18 (4) 152-156.