Subject
- American beaver -- Ecology -- Oregon -- John Day River Watershed1
- American beaver -- Habitat -- Oregon -- John Day River Watershed1
- American beaver -- Home range -- Oregon -- John Day River Watershed1
- American beaver -- Oregon -- John Day River Watershed1
- American beaver -- Oregon -- John Day River Watershed -- Genetics1
- Aspen -- Effect of browsing on -- Yellowstone National Park1
- Aspen -- Protection -- Yellowstone National Park1
- Aspen -- Yellowstone National Park -- Growth1
- Bison -- Food -- Environmental aspects -- Yellowstone National Park1
- Browse (Animal food) -- Yellowstone National Park1
- Browsing (Animal behavior) -- Environmental aspects -- Yellowstone National Park1
- Climate change mitigation -- Maine1
- Climate change mitigation -- Oregon1
- Climatic changes -- Social aspects -- Maine1
- Climatic changes -- Social aspects -- Oregon1
- Coast changes -- Social aspects -- Maine1
- Coast changes -- Social aspects -- Oregon1
- Community development -- Maine1
- Community development -- Oregon1
- Elk -- Food -- Environmental aspects -- Yellowstone National Park1