Subject
- Bullfrog -- Habitat -- Oregon -- Willamette River Valley1
- Bullfrog -- Larvae -- Ecology -- Oregon -- Willamette River Valley1
- Bullfrog -- Oregon -- Willamette River Valley1
- Carbon cycle (Biogeochemistry) -- Costa Rica1
- Carbon sequestration -- Costa Rica1
- Chinook salmon -- Migration -- Yukon River Watershed (Yukon and Alaska)1
- Chinook salmon -- Spawning -- Yukon River Watershed (Yukon and Alaska)1
- Chinook salmon -- Yukon River Watershed (Yukon and Alaska) -- Geographical distribution1
- Coho salmon -- Effect of temperature on -- Smith River, West Fork (Douglas County, Or.)1
- Competition (Biology) -- Bahamas1
- Coral reef ecology -- Bahamas1
- Coral reef fishes -- Bahamas1
- Detritus -- Northwest, Pacific1
- Fish stock assessment -- Mathematical models1
- Fish stock assessment -- Methodology1
- Food chains (Ecology) -- Arizona -- Chiricahua Mountains1
- Food chains (Ecology) -- Northwest, Pacific1
- Freshwater ecology -- Arizona -- Chiricahua Mountains1
- Freshwater organisms -- Effect of drought on -- Arizona -- Chiricahua Mountains1
- Freshwater organisms -- Effect of water levels on -- Arizona -- Chiricahua Mountains1