D.M. ORR¹, C.J. PATON² and S. McINTYRE³

¹Queensland Department of Primary Industries, Tropical Beef Centre, Rockhampton, and
²Brian Pastures Research Station, Gayndah, Queensland, Australia
³Division of Tropical Crops and Pastures, CSIRO, Brisbane, Queensland, Australia

Abstract

A brief history and a state and transition model are described for the southern black speargrass zone.
The model proposes 4 states based on the herbaceous layer and timber composition. Transitions between these states are presented together with those factors driving the changes. The probabilities of achieving these transitions are presented along with a number of research needs required to further understand the proposed model.