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The biodiversity of the Mallee has been shaped by a climate of temperature extremes, low rainfall, and underlying geology.

The result is a series of unique ecosystems that are significant, particularly for reptiles and birds.  This uniqueness combined with historical land clearing for agricultural development has led to a significant number of Mallee flora and fauna species, as well as ecological communities, to be listed as threatened in both Victoria and at a national level.


A primary threat to Mallee biodiversity is the loss of ecological processes, particularly in regard to ecosystem fragmentation, disturbed breeding and regeneration cycles; and species population imbalances.  Habitat is the key to maintaining and enhancing biodiversity.  The size, number, connectivity and quality of patches will determine how well ecological processes continue to function in the region.  Invasive plants and animals, land and water salinisation, wind erosion, changing land use and altered fire regimes also interact with and further threaten ecological processes.

Tree planting initiative in winter 2009

Planting.JPGThe key focus of the Mallee CMA’s Biodiversity Program is to facilitate the protection and enhancement of the region’s terrestrial biodiversity assets through the implementation of targeted on-ground interventions that address these threatening processes; and through increased community awareness of, and participation in, conservation activities.

Projects & Activities

For information on projects and associated activities delivered by the Biodiversity Program, please select from the list below:


Fact Sheets provide a summary of projects and can be a useful tool for finding out details about activities being conducted in the region. To view a full list of Biodiversity Fact Sheets click here.

Technical Bulletins are detailed summaries of major projects delivered by the Biodiversity Program.  To view the Technical Bulletins produced to date, click here.

Final reports from a selection of projects delivered by the Biodiversity Program can be downloaded by clicking here.

Strategies and Plans relevant to the Biodiversity Program can be downloaded by clicking here.

Decision Support and Awareness Raising Tools

For information on how to help protect and enhance Mallee biodiversity, please select from the list below:

Ecological vegetation class (EVC) mapping delivers important information with regards to the remaining extent of the various vegetation classes following the extensive clearing of the past 150 years. It provides an effective means for conservation planning at a regional scale, enabling the various rare, depleted, vulnerable or endangered vegetation classes to be targeted for immediate action.

To view a map of EVC groupings in the Mallee click here.

EVC mapping is available online to the general public at the DSE website.

Bioregions are based primarily on differing biological and geographical criteria and permit the separation of the various natural resource issues and attributes occurring within each of the zones. A bioregion delineates common ecological characteristics within the landscape and is seen as a natural framework for recognising and responding to biodiversity values. Bioregions identified in Victoria form part a national framework (IBRA - Interim Biogeographical Regionalisation of Australia). Of the 21 Victorian bioregions, six are represented in the Mallee CMA region. For a map on Mallee Bioregions please click here.

  • The Mallee Native Vegetation Plan is a strategic document intended to guide regional activities in native vegetation management and issues relating to native vegetation.

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