1. Conservation of Freshwater Ecosystem Values (CFEV) Validation Report (National Water Initiative – Australian Government Water Fund. Report 1a/6 Report to the Conservation of Freshwater Ecosystem Values Project, Water Resources Division, Department of Primary Industries and Water)
- Author
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Davies, PE, Cook, LSJ, Sloane, T, Koehnken, L, Barker, P, Davies, PE, Cook, LSJ, Sloane, T, Koehnken, L, and Barker, P
- Abstract
The Tasmanian Conservation of Freshwater Ecosystem Values (CFEV) framework (DPIW in prep.) was developed by the Department of Primary Industries and Water (DPIW) in order to rate the conservation value and management priority of all mapped examples of freshwater ecosystems in the state. A systematic approach was used based on the ‘CAR’ principles of Comprehensiveness, Adequacy and Representativeness, and a set of data which identified the natural biophysical character and condition of the ecosystems in a standardised way. The data used was based on the most up to date spatially attributed features and condition measures available that could be systematically applied across the entire state. This required existing data sets to be updated and/or extended in many cases. It also required new data to be collated, and frequently attributed to ecosystem units based on mapping rules and or modelling. Natural feature data (CFEV ‘biophysical classes’) was used to represent the biophysical character or type of an ecosystem based on the pre-European natural ‘reference’ state. i.e. it represents what would have been present in the absence of European settlement and development. These data were developed for as wide a range of ecosystem components as possible (e.g. fish, vegetation, hydrology, etc.) in order to adequately characterise each ecosystem unit. Data from each of these components was then attributed directly to each mapped ecosystem unit, without integration across components or the use of surrogates. Condition data (CFEV ‘naturalness’) was used to quantify the degree of change in the biophysical state of each ecosystem unit since European settlement. Only a few data sets were available on direct measures of biophysical condition which could be applied to more than a few ecosystem units. Thus a systematic way of rating biophysical condition was needed, which could include measures of both biological and physical condition and integrate them into a single condition or ‘N