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Subject: Limnology
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
No Records.