To supplement the aims of Workpackage 7 and the objectives of the project. To extend the coverage of existing or developing pan-European assessment methods and databases.
Additional stream types fulfil four roles. They will:
The specific rules governing the number and type of sites to be sampled in Workpackage 8 are the same as specified in Workpackage 7. Altogether, additional stream types will be sampled in 9 countries. In contrast to the 'core stream types', only sites degraded by a selected stressor will be investigated according to their phytobenthos and fish fauna. For all sites the AQEM site protocol will be completed. Additional stream type field, laboratory and audit procedures will be the same as those adopted for Workpackage 7.