Subject
- Plant communities -- Oregon3
- Biscuit Fire, Or. and Calif., 20022
- Fire ecology -- Siskiyou National Forest (Or. and Calif.)2
- Forest ecology -- Oregon2
- Forest plants -- Oregon2
- Forest regeneration -- Siskiyou National Forest (Or. and Calif.)2
- Gifford Pinchot National Forest (Wash.)2
- Mount Hood National Forest (Or.)2
- R6-ECOL-TP2
- Wallowa National Forest (Or.)2
- Whitman National Forest (Or.)2
- Abies grandis1
- Air -- Pollution -- Alaska -- Tongass National Forest -- Measurement1
- Air quality management -- Alaska -- Tongass National Forest1
- Aluminum plants -- Environmental aspects -- Montana1
- Animal-plant relationships -- Oregon -- Deschutes National Forest1
- Armillaria root rot -- Oregon -- Deschutes National Forest1
- Atmospheric deposition -- Environmental aspects -- United States1
- Atmospheric nitrogen compounds -- Environmental aspects -- Colorado -- Rocky Mountain National Park1
- Atmospheric sulfur compounds -- Environmental aspects -- Appalachian Region, Southern1