Citizen scientists accompany EcoCentre experts on beach shoreline shell surveys to collect shells and record the distribution, variety and abundance of bivalves and gastropods. Measurements are taken, abundance is estimated, species are identified or described and photographed for the record. Monitoring shells over a long time may give us information about how the populations are tracking, and the effects of climate change on their populations. Inter-tidal molluscs (shellfish and sea snails) are important keystones of the food web in Port Phillip Bay (Victoria). They help contribute about $11 billion worth of ecosystem services of Port Phillip Bay to the State of Victoria by filtering water and making free nitrogen available to the food chain. They are food for many animals, including native and migratory water birds.
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