Showing items related by title, author, creator and subject.
Welchlin, Roger L. (Drake University, 1975-08)The problem. To calculate rates for birth, death, and natural increase of zooplankton found in an unpolluted artificial pond. This will serve as a basis for comparisons with other bodies of water to show man's effect upon ...
Arneson, Susan Rebecca (Drake University, 1977-11)The problem. This study was undertaken to evaluate the impact of secondary sewage effluent and highway deicinq salt runoff on a planktonic green alga. Procedure. The test organism, Selenastrum capricornutum, was grown ...