Invasion

Invasion Description

1st Record: River Mile 12-River Mile 23/OR-WA/Columbia River estuary (1990, Cordell et al. 1992)

Geographic Extent

WA/Chehalis River estuary (1991, Cordell and Morrison 1996; Cordell et al. 2007); WA/Willapa River estuary (1991, Cordell and Morrison 1996); River Mile 12-River Mile 23/OR-WA/Columbia River estuary (Cordell et al. 1992), largely replaced by P. forbesi by 2002 (1991, Cordell in Sytsma et al. 2005); Cordell et al. 2008b; not detected in 2005-2013, Dexter et al. 2015); OR/Youngs River Estuary (1991, Cordell and Morrison 1996; Vancouver/WA/Columbia River (not detected in sampling, 2005-2013, Dexter et al. 2013); OR/Tillamook River estuary (1991, Cordell and Morrison 1996); OR/Yaquina River estuary ((1991, Cordell and Morrison 1996); OR/Umpqua River estuary (1991, Cordell and Morrison 1996); OR/Coos Bay (1991, Cordell and Morrison 1996)