Zebra/Quagga Mussel Substrate Monitoring

The CLR coordinates the Zebra and Quagga Mussel Monitoring Program to help prevent the continued spread of invasive freshwater mussels such as zebra and quagga mussels (Dreissena polymorpha and D. rostriformis bugensis, respectively). Dreissenid mussels cause far-reaching damage to water structures and native ecosystems. Monitoring and early detection of these mussels are key to minimizing the risks for western water bodies. There are multiple methods used for early detection monitoring that target all Dreissenid life stages including the planktonic larvae (veligers) as well as settled juvenile and adult mussels. 


The Zebra and Quagga Mussel Monitoring Map displays data stored in the CLR online database, and shows who is monitoring what water bodies using what methods, and the status and date of the last reports regarding these efforts. The data are queried in several ways. The Search function allows a user to directly query the database by typing the name of a water body (e.g., Columbia River), and/or selecting for species, status, substrate Type, and agency. Clicking on an individual map symbol, will provide an information pop-up, e.g., monitoring station name, date of collection, the status of the efforts, and lead agency.

There are numerous individuals and agencies conducting early detection monitoring for Dreissenid mussels. It is important to include these other efforts to increase regional coordination and monitoring effectiveness. The map user can add information regarding their monitoring efforts to the database and map by filling out the mussel report form. Data entered by map users are not displayed on the map until it is approved by PSU. Contact Steve Wells for other ways to upload monitoring data, e.g., uploading Excel spreadsheet.