Subject
- Biochemical markers1
- Biological ecology -- Oregon1
- Bird populations -- Alaska -- Prince William Sound1
- Camp sites, facilities, etc. -- Environmental aspects -- California -- Yosemite National Park1
- Cavity-nesting birds -- Effect of fires on -- Oregon, Eastern1
- Cavity-nesting birds -- Habitat -- Oregon, Eastern -- Remote sensing1
- Ceanothus -- Effect of fires on -- Oregon -- Applegate River Watershed1
- Ceanothus -- Effect of grazing on -- Oregon -- Applegate River Watershed1
- Chaparral ecology -- Oregon -- Applegate River Watershed1
- Chondrichthyes1
- Endemic plants -- Herbicide injuries -- Oregon -- Willamette River Valley1
- Endemic plants -- Oregon -- Wallowa Mountains1
- Endemic plants -- Oregon -- Wallowa Mountains -- Geographical distribution1
- Euphausiacea -- Ecology -- Oregon1
- Exotic plants -- Oregon -- Wallowa Mountains1
- Exotic plants -- Oregon -- Wallowa Mountains -- Geographical distribution1
- Exxon Valdez Oil Spill, Alaska, 1989 -- Environmental aspects1
- Fire ecology -- Oregon, Eastern -- Remote sensing1
- Fish communities -- Effect of water levels on -- Oregon1
- Fish communities -- Effect of water levels on -- Washington (State)1