Our study focused on seven marsh sites distributed throughout Humboldt Bay and largely within
refuge boundaries; Hookton Slough Island, Salmon Creek marsh, White Slough marsh, Eureka
Slough marsh, Jacoby Creek marsh, Mad River Slough marsh, and Manila marsh. These marshes
provide important habitat for marsh-dependent species, such as Humboldt Bay Owl’s Clover
(Castilleja ambigua), Western Snowy Plover (Charadrius alexandrinus nivosus), and Steelhead
(Oncorhynchus mykiss).
