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dc.contributor.authorToczydlowski, David G.en_US
dc.description.abstractThree nontaxonomic indices; ATP/Chlorophyll a(ATP/Chla), ATP/ADP, and Chlorophyll a/Pheopigment (Chla/Pheo) were compared to the taxonomic measures of species diversity (d) and species richness as indicators of stress in aquatic environments. Field and laboratory microcosm responses of indigenous microbial communities exposed to municipal sewage treatment plant (STP) effluent were monitored. The STP effluent produced increased adenylate concentrations, ATP/ADP and ATP/Chla ratios, and decreased Chla, Chla/Pheo, d, and species richness relative to upstream reference communities. Nontaxonomic responses were consistent in four separate field tests.

Significant differences in responses were discernible in 3 d when communities were transferred from reference to polluted sites. Chla/Pheo decreased more rapidly than other measurements. The predictive capability of laboratory flowâ through microcosm tests was examined by simultaneously transferring communities from upstream reference sites to downstream field sites and to various dilutions of field effluent in the laboratory.

dc.publisherVirginia Techen_US
dc.subjectAquatic organismsen_US
dc.subject.lccLD5655.V855 1985.T639en_US
dc.titleAquatic microbial community responses to stress: comparison of nontaxonomic and taxonomic indicesen_US
dc.description.degreeMaster of Scienceen_US of Scienceen_US Polytechnic Institute and State Universityen_US
dc.contributor.committeechairBuikema, Arthur L. Jr.en_US
dc.contributor.committeememberCairns, John Jr.en_US
dc.contributor.committeememberHorner, Sally G.en_US

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