Data on the population dynamics of three 'woody weed' species Acacia deanei, Cassia nemophila and Dodonaea viscosa, collected over a 12 year period at a disturbed site near Boggabri showed that recruitment generally occurred on an annual basis as soil moisture conditions allowed. Population numbers for A. deanei and C. nemophila rose dramatically after approximately 4 and 5 years respectively due to maturation of and seedfall from early individuals. Dodonaea viscosa showed a slower rate of increase, presumably due to lower levels of seed production. Mortality was highest for all species up to age two while mature individuals persist in the population structure. The results provide further information on the temporal changes of these species populations over the longer term, with a view to assisting in the refinement of control strategies.
Full-text publications from the Australian Rangelands Society (ARS) Biennial Conference Proceedings (1997-), Rangeland Journal (ARS/CSIRO; 1976-), plus videos and other resources about the rangelands of Australia.