Invasion
Invasion Description
1st Record: OR/lWillamette River (1894, Smith 1895; Lampman 1946; ).
Geographic Extent
OR/lWillamette River (Lampman 1946; USGS Nonindigenous Aquatic Species Program 2003); OR-WA/lower Columbia River (Lampman 1946; USGS Nonindigenous Aquatic Species Program 2003); Portland/OR/Columbia Slough (20008, Van Dyke et al. 2009)
Vectors
Level | Vector |
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