BVTs:
Broad vegetation types (BVTs) categorise a diversity of indigenous vegetation assigned on the basis of existing vegetation and other biophysical parameters, such as geology, rainfall, elevation and soil type (formerly DNRE, 1997).
EVCs:
Ecological Vegetation Classes (EVCs) are categories of distinct vegetation types based on differences in broad landscape features and environmental regimes. Each of these broader units may be divided into a few or many, and their descriptions also include considerations of life form, genera and vegetation structure (Todd, pers. comm.). EVCs can consist of one or a number of floristic communities that exist under a common regime of ecological processes within a particular environment at a bioregional or broader scale (formerly DNRE, 1997).
References:
The former DNRE, (1997) Victoria’s Biodiversity: Directions in Management, Department of Natural Resources and Environment, East Melbourne.
James Todd, Parks, Flora & Fauna Division, the former Department of Natural Resources and Environment, personal communication, July 2000.