Trudi L. Mullett
Post Doctoral Research Fellow
Ph.D., Deakin University, Australia, 2000
Phone (+61) 02 6246 5498
Fax: (+61) 02 6246 5249
Centre for Plant Biodiversity Research
CSIRO Plant Industry
GPO Box 1600
Canberra ACT 2601
My research addresses the impacts of invasive plants, or environmental
weeds, on native vegetation communities. Environmental weed invasions
are widely regarded as a serious threat to the biodiversity values
of natural Australian ecosystems. However, few studies to date have
quantitatively assessed the biodiversity impacts of environmental
weed invasions on invaded Australian ecosystems. In the absence
of empirical evidence, the impacts of environmental weed invasions
are largely assumed and management priorities may be misdirected.
My research has focused on quantifying the impacts imposed on native
plant communities by two of the most notorious fleshy-fruited weed
species in south east Australia; the tall native shrub, Pittosporum
undulatum (Sweet Pittosporum), and the spreading South African
shrub, Chrysanthemoides monilifera ssp. rotundata.
Specific aspects addressed in these studies include the quantification
of weed invasion impacts on plant species richness, community cover
and community composition. Impacts on soil-stored seed banks and
disparate invasion effects on various guilds and the broader implications
for community restoration are also addressed.
An experiment investigating the response of Bitou Bush and native
species to combinations of smoke and heat treatments is currently
in progress. The key purpose of this experiment is to determine
the efficacy of smoke in stimulating germination of native species
and Bitou Bush as a potential surrogate for prescribed burning
stimulus as the latter approach is difficult to implement in most
Mullett T. L. (in press) Pittosporum undulatum
Vent. (Pittosporaceae) A Review. Biology of Australian Weeds
series. Plant Protection Quarterly.
Mullett T. L. (2001) Effects of the native environmental
weed Pittosporum undulatum Vent. (sweet pittosporum)
on plant biodiversity. Plant Protection Quarterly 16,
Mullett T. L. & Weber R. (2000) Trend analysis for native
vegetation in the Goulburn Broken Catchment. Background Paper
for the Goulburn Broken Catchment Native Vegetation Strategy.
Mullett T. L. (1999) Some characteristics of a native
environmental weed: Pittosporum undulatum. In: Proceedings
of the 12th Australian Weeds Conference, Hobart (eds A.
C. Bishop, M. Boersma and C. D. Barnes), pp. 592-5. Tasmanian
Weed Society, Devonport.
Mullett T. L. (1998) A Survey of the Farming Community's
Response to Rising Water-tables and other Farm Management Issues,
1996 to 1998: A Report to the Goulburn Murray Landcare Network.
Goulburn Murray Landcare Network, Goulburn Broken Catchment
Management Authority and Department of Natural Resources and
Grant J., Mullett T. & Winters B. (1996) Weeds: An
Activity Kit for Schools. Gould League of Victoria Inc.
and Department of Conservation and Natural Resources, Victoria.
Mullett T. & Simmons D. (1995) The ecological impacts
of sweet pittosporum (Pittosporum undulatum Vent.) in
dry sclerophyll forest communities, Victoria. Plant Protection
Quarterly 10, 131-8.
CURRENT RESEARCH PROJECTS
Weed Impacts on Biodiversity