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Defining a minimum fire-return interval for the northern sandplain shrublands, Western Australia

Westcott, V., Enright, N.ORCID: 0000-0003-2979-4505, Miller, B., Fontaine, J.ORCID: 0000-0002-6515-7864 and Lamont, B. (2011) Defining a minimum fire-return interval for the northern sandplain shrublands, Western Australia. In: Ecological Society of Australia, 2011 Annual conference, 21 - 25 November 2011, Hobart, TAS, Australia.

Abstract

The length of inter-fire intervals plays a central role in determining species composition in plant communities across the world. Recently, extremely short intervals have been identified as a threatening process for the ongoing persistence of species in a number of vegetation types.

A variety of methods were used to determine a minimum fire-return interval suitable for the maintenance of biodiversity in the species-rich and fire-prone northern sandplain shrublands of Western Australia. Several species considered vulnerable to high fire frequency were selected for demographic analysis with space-for-time substitution used to determine key life-history attributes such as time to produce adequate seed for self-replacement. Community-level resilience was captured using pre- and post-fire plot comparisons in recently burnt vegetation that was re-burnt by experimental fires. The stability of each site was measured in terms of resemblance to pre-fire composition at 12 months after fire. The effect of post-fire rainfall on seedling mortality was also examined as a factor independent of fire interval length.

The results were combined to identify a minimum return interval that has provided land managers with a sound ecological basis for determining an appropriate prescribed burning regime for the community.

Item Type: Conference Item
Murdoch Affiliation(s): School of Environmental Science
URI: http://researchrepository.murdoch.edu.au/id/eprint/12355
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