SENSITIVE INVERTEBRATE PROFILE

(Hershler and Liu 2004a; 2004b). Upstream migration may be a mechanism for active dispersal (Hershler and Liu 2004b); while passive dispersal may be mediated by attachment to waterfowl (Liu et al. 2003). Recent introductions of . P. robusta. in the Columbia River basin are presumably human mediated (Johannes 2019). ................
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