Title page for ETD etd-11152013-040236


Type of Document Master's Thesis
Author Christensen, Karen P.
URN etd-11152013-040236
Title Changes in colonization dynamics and community structure of protozoans and macroinvertebrates in response to stress
Degree Master of Science
Department Biology
Advisory Committee
Advisor Name Title
Arthur L. Buikema, Jr. Committee Chair
E. F. Benfield Committee Member
William H. Yongue, Jr. Committee Member
Keywords
  • Industrial toxicology
Date of Defense 1985-12-05
Availability restricted
Abstract

The response of macroinvertebrate and protozoan colonization dynamics to industrial pollution was determined in a thermal organic effluent and in a metals effluent. The relationship of the time course data to the MacArthur-Wilson model is considered, along with Pinkham and PearsonĀ°s community similarity index and traditional community structural parameters. The response of both communities is similar with respect to equilibrium number of taxa at both sites; however, the fitted rate constant, G, was accelerated in the organic effluent for the protozoans. The macroinvertebrate G in the same effluent showed a dose response. There were no differences in rate between stations in the metals effluent for either the protozoans or the macroinvertebrates, although the equilibrium number of taxa was decreased downstream.

Community similarity indices shows similar macroinvertebrate and protozoan communities at all three stations in the organic system at equilibrium, although some differences occur in the early stages of colonization. The communities in the metals effluent are most often significantly different at the downstream station, which was the most impacted. Community diversity indices indicate the same results for the equilibrium community as do the other methods of evaluation. While community colonization studies have been suggested as a method of water quality assessment, colonization dynamics and particularly the fitted rate constant, G, may be misleading unless considered in conjunction with equilibrium information.

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