of pollutants on biodiversity and the development of cost- effective tools to measure those impacts. Nutrient enrichment, which can lead to eutrophication, is the focus of considerable management effort. Introduction
• They can be identified by use of shell features. • They inhabit almost all marine environments. • They can reach considerable high diversity and abundance. • They are poorly vagile, they can hardly avoid changing environmental conditions. Molluscs as indicators
in rocky shores. b) Test the effectiveness of intertidal molluscan assemblages as biomonitoring tool. c) Establish networks of sites for future strategic research. d) Develop a comprehensive biodiversity database. Pollution
abundance and different structure. The structure of molluscan assemblages is significant related to the levels of nutrient of coastal waters. Mollusc are a potentially effective and sensitive indicator of nutrient pollution.
Samuel, Edel for help on sample sorting and identification. Cristina, Davidone, Judita, Maria B. and Jayne for their fieldwork help. R. Cave (NUI Galway) and R. French for help on the water chemistry. L. Scally and S. Waldren for BIOCHANGE project coordination. Ken Irvine for comments, TP data and metrics MS. EPA for funding and environmental data