Invasion

Invasion Description

1st Record: Big McNary Lake on Sauvie Island/OR/Columbia River (1995, Center for Aquatic Resource Studies 2009)

Geographic Extent

Big McNary Lake on Sauvie Island/OR/Columbia River (1995, Center for Aquatic Resource Studies 2009); OR-WA/Columbia River estuary (Sytsma et al. 2004); Kelly Point Park, Portland/OR/Columbia Slough, Columbia River (2002, Center for Aquatic Resource Studies 2009); Longview /WA/Longview drainage ditch, Solo Storage entrance, Columbia River (2002, Center for Aquatic Resource Studies 2009)