Prediction of invertebrate communities using stream measurements

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Abstract
An account is given of the development of a computer‐based system for prediction of the invertebrate fauna to be expected at unpolluted sites using environmental features. The variables for use in prediction and the flexibility of the output, with respect to taxonomic level, are demonstrated using an early version of the system which has been tested within the water industry. The practical value for river management of predictions of species, families, and biological indices is elaborated. In addition, the relevance of the system throughout Great Britain for setting target values of a biological index is demonstrated.A new version of the prediction system has recently been developed. It has application over a wider range of river systems and incorporates additional options for prediction, as requested by the Water Industry. Further developments of the system to make it more efficient for operational use are now under active consideration.