Subject

• Benthic macroinvertebrates 4
• Algae 2
• Aquatic biology 2
• East Branch Lake (Pa.) 2
• Freshwater ecology 2
• Acid deposition 1
• Algae -- Growth -- Measurement 1
• Ankistrodesmus falcatus 1
• Aquatic ecology -- Pennsylvania -- Kahle Lake 1
• Aquatic insects 1
• Aquatic plants 1
• Aquatic weeds -- Control 1
• Brook trout 1
• Fish populations 1
• Fishes -- Growth 1
• Freshwater biology 1
• Freshwater ecology -- Pennsylvania -- Bigger Run 1
• Freshwater ecology -- Pennsylvania -- Longs Run 1
• Kahle Lake (Pa.) 1
• Mine drainage 1
• Photosynthesis 1
• Phytoplankton 1
• Piney Reservoir (Clarion, Pa.) 1
• Plankton -- Research 1
• Primary productivity (Biology) 1
• Stream ecology 1
• Stream ecology -- Pennsylvania 1
• Sunfishes 1
• Typha 1
• Water -- Pollution 1
• White sucker 1
• Zooplankton -- Pennsylvania -- Kahle Lake 1
• Zooplankton -- Pennsylvania -- Piney Reservoir (Clarion) 1