Population Dynamics of Copepoda and Cladocera in an Iowa farm pond, Summer 1973

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dc.contributor.author Welchlin, Roger L.
dc.date.accessioned 2010-01-22T16:26:49Z
dc.date.available 2010-01-22T16:26:49Z
dc.date.issued 1975-08
dc.identifier.other 1975 .W447
dc.identifier.uri http://hdl.handle.net/2092/1035
dc.description 59 leaves. Advisor: Dr. P. J. Kingsbury en_US
dc.description.abstract 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 one of the most basic of all ecosystems. Procedure. Water samples were collected with a Kemmerer Water Sampler and poured into a plankton net for concentrating the organisms. They were killed in 4% formalin and counted keeping records of species numbers, sex, and reproductive condition. Abiotic factors were also measured and recorded. Findings. The greatest concentration of organisms was always located at the 2.5 meter depth. Species' densities did fluctuate directly with primary productivity after a certain lag period. but no other factor was found to have an influence upon the zooplankton location or density. Conclusion. All of the populations varied greatly, but food had the greatest direct effect upon the densities. Recommendations. It would be necessary to conduct a long term study of the same pond so that a complete understanding could be obtained of development, growth. and extinction of the various populations. For a complete understanding of the zooplankton community, techniques involving evaluations of competition, predation and interreactions between populations should be developed and included. en_US
dc.publisher Drake University en_US
dc.relation.ispartofseries Drake University, School of Graduate Studies;1975
dc.subject Farm ponds--Iowa--Population-environmental aspects en_US
dc.subject Copepoda--Iowa--Population-environmental aspects en_US
dc.subject Cladocera--Iowa--Population-environmental aspects en_US
dc.title Population Dynamics of Copepoda and Cladocera in an Iowa farm pond, Summer 1973 en_US
dc.type Thesis en_US

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