This report discusses major characteristics of western Oregon’s lowland rivers, streams, and estuaries that the IMST finds to be important to wild salmonids. IMST describes how landscape scale factors (landscape structure, landscape function, disturbance regimes, and landscape scale biological processes) historically supported salmonid populations in western Oregon lowlands. The report...
Stream restoration techniques in western Oregon and Washington include
physical habitat restoration and more recently the addition of salmon carcasses to
improve food availability for juvenile fish. Although both are common practices, few
studies have examined the effects of carcass placement and the interaction of nutrient
enrichment with physical habitat...
I classified the environment of the Klamath Mountains region into physical habitat types using climate and soil variables and a geographic information system (GIS). I used principal components analysis to find four variables representing most regional climate variation: average annual precipitation, the difference between December and July precipitation, average annual...
[v. 1. Text] -- [v. 2]. Summary of state agency measures -- [v. 3]. Land use designation and regulation -- [v. 4]. Watershed councils -- [v. 5]. Watershed projects -- [v. 6]. Science team information and products -- [v. 7]. Information related to habitat restoration projects -- [v. 8]. Responses...
The Oregon Plan for Salmon and Watersheds, Technical Reports from the Independent Multidisciplinary Science Team (IMST) and numerous other documents identify an extensive array of research needed to recover depressed stocks of wild salmonids in Oregon. The limitation of such listings is that they do not prioritize the research needs,...
The endangered Hawaiian Duck (koloa maoli; Anas wyvilliana), a non-migratory and island-endemic species, experienced a significant population decline during the twentieth century due to factors such as habitat loss, overharvest, introduced mammalian predators, and hybridization with introduced feral Mallards (A. platyrhynchos). A key objective for Hawaiian Duck recovery is to...
I developed a priori hypotheses and used logistic regression to model Greater Sandhill
Crane (Grus canadensis tabida) nest success in relation to weather, habitat and management variables for cranes breeding at Malheur National Wildlife Refuge (MNWR) in southeast Oregon. My primary interest was to investigate the effects of habitat conditions...
All streams in Oregon that are inhabited by salmon and trout have a statemandated
water temperature standard. However, temperatures of many streams,
especially during summer months, exceed the seven-day average maximum
temperature parameter (200 C for redband trout inhabited streams) accepted by the
Oregon Department of Environmental Quality. To date,...
In the wetland prairie of William L. Finley National Wildlife Refuge (FNWR) in western Oregon, we investigated the response of Delphinium pavonaceum Ewan (peacock larkspur, Ranunculaceae), an endangered perennial forb, to four unreplicated dormant season fire regimes of 0, 2, 4, or 10 fires that were applied over a 12-year...
I investigated survival, movements, home range sizes, and habitat selection of pygmy rabbits (Brachylagus idahoensis) in southeastern Oregon and northwestern Nevada from June 2005 to June 2007. I trapped 298 rabbits on four sites and fitted each with radio transmitters. More than 13,000 locations of telemetered rabbits were recorded. I...