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Lower Columbia River Aquatic Nonindigenous Species Survey 2001-2004
Center for Lakes and Reservoirs Publications and Presentations
  • Mark Sytsma, Portland State University
  • Jeffery Cordell, University of Washington
  • John Chapman, Oregon State University
  • Robyn Draheim, Portland State University
Document Type
Technical Report
Publication Date
  • Introduced aquatic organisms -- Oregon -- Columbia River,
  • Introduced aquatic organisms -- Control -- Oregon,
  • Environmental protection -- Columbia River Watershed
Rates of aquatic nonindigenous species (ANS) introductions and their social, economic, and ecological impacts are increasing. Introductions of nonnative marine organisms have increased exponentially over the last two centuries and expenditures on outreach, control, and research exceed millions of dollars per species for several invaders of particular concern to the United States. These trends suggest that major changes are occurring in the freshwater, estuarine, and marine ecosystems of North America, but their magnitude is probably underestimated.

Prepared for the United States Coast Guard and the United States Fish and Wildlife Services

Persistent Identifier
Citation Information
Mark Sytsma, Jeffery Cordell, John Chapman and Robyn Draheim. "Lower Columbia River Aquatic Nonindigenous Species Survey 2001-2004" (2004)
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