ESTABLISHMENT AND DEVELOPMENT OF REGENERATION IN SPOTTED GUM—IRONBARK FORESTS

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Abstract
Observations and experiments on the lignotuberous and seedling regeneration in spotted gum—ironbark forests are recorded. The effects of annual prescribed burning, severe wildfires, and regeneration burning on lignotubers and seedling establishment are described. Factors having a bearing on the long-term maintenance of the lignotuber-form are discussed. There is a striking response to complete removal of the canopy, but development of the lignotuberous seedlings is restricted for some distance from the edge of the surrounding canopy. The hypothesis is advanced that there may be in these forests a complex type of equilibrium in which the development of a given lignotuberous or advance-growth stem is determined by the level of stocking in a wide arc of the surrounding stand, rather than by competitive pressure from the immediately adjacent or overtopping stems.

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