Assessment methods, however, are still incomplete and have not yet been made comparable between countries in a sufficient way.
WISER will improve existing and develop new assessment methods for all organism groups, with a focus on regions where assessment methods are still lacking. A large number of existing data will be used, and a field exercise will be performed. All organism groups will be sampled in a variety of European lakes covering a gradient in degradation.
Biotic data will be related to environmental data to select methods reflecting the degradation status of a lake.