Title page for ETD etd-12162009-020200


Type of Document Master's Thesis
Author Arnegard, Matthew E.
URN etd-12162009-020200
Title Toxicant-releasing substrates :a new method for delivering copper to microbial communities in SITU
Degree Master of Science
Department Biology
Advisory Committee
Advisor Name Title
Cairns, John Jr. Committee Chair
Cherry, Donald S. Committee Member
Smith, Eric P. Committee Member
Keywords
  • Copper
Date of Defense 1993-05-05
Availability restricted
Abstract

Currently, protocols for investigating the effects of chemical pollutants on periphyton communities under natural conditions are statistically flawed and/or potentially harmful to the ecosystems in which the studies are conducted. Toxicant-releasing substrates have been proposed to allow the delivery of different levels of chemical pollutants to replicate microbial communities in situ while minimizing the amount of toxicant released into the aquatic ecosystems under investigation. The purpose of this research was to compare the copper-induced responses of laboratory periphyton communities in artificial streams to those generated using standard, laboratory toxicity testing protocols during a summer and winter experiment. Chemical-releasing substrates were successfully used to deliver copper to periphyton communities in a predictable manner, over a broad range of doses, and at fairly constant rates during one week exposure periods.

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