Workshop identifies dreissenid mussle research for effective management

Under the Shared Landscapes Outcomes Initiative of the Great Northern Landscape Conservation Cooperative (GNLCC) to address aquatic integrity and stressors in the Columbia River Basin, the GNLCC's Columbia Basin Partner Forum (CBPF) is facilitating information sharing and collaboration across partners.
In response to shared concerns from the CBPF about aquatic invasive species in the Columbia River Basin, and a direct request from Pacific Northwest Economic Region (PNWER) for a prospectus on priority research needs for quagga and zebra mussels, CBPF convened a workshop on November 4-5, 2015, at Portland State University.

Currently, dreissenid mussels have yet to be detected in the northwestern part of the United States and western Canada. Infestation of one of the jurisdictions within the mussel-free Pacific Northwest would likely have significant economic, societal and environmental implications for the entire region. Understanding the biology and environmental tolerances of dreissenid mussels, and effectiveness of various management strategies, is key to prevention.
Map of zebra and quagga mussel sightings distribution, March 2016, USGS

Map of zebra and quagga mussel sightings distribution, March 2016, USGS


The purpose of the workshop was to update research priorities in the 2010 Quagga-Zebra Mussel Action Plan in light of the westward expansion of mussels in the United States and Canada.

A total of 28 experts in mussel biology, ecology, and management attended the workshop. A pre-workshop survey was provided to individuals recognized as experts in their field, including some that were unable to attend the workshop.

Workshop attendees reviewed the pre-workshop survey results, the priorities from the 2010 Quagga- Zebra Mussel Action Plan, and recommendations made by presenters at the workshop. Attendees then prioritized research within the categories of prevention, detection, monitoring, management and control. In addition, research on the human dimensions of mussel dispersal and management were identified as critical to successful prevention and response to a mussel introduction.


Explore these resources to learn more about workshop results:

Workshop report

Report cover


Webinar recording and slides 

Webinar introduction slide