Aquatic microbial community responses to stress: comparison of nontaxonomic and taxonomic indices

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dc.contributor.authorToczydlowski, David G.en
dc.contributor.committeechairBuikema, Arthur L. Jr.en
dc.contributor.committeememberCairns, John Jr.en
dc.contributor.committeememberHorner, Sally G.en
dc.contributor.departmentZoologyen
dc.date.accessioned2014-03-14T21:49:36Zen
dc.date.adate2012-11-14en
dc.date.available2014-03-14T21:49:36Zen
dc.date.issued1985-05-05en
dc.date.rdate2012-11-14en
dc.date.sdate2012-11-14en
dc.description.abstractThree nontaxonomic indices; ATP/Chlorophyll <u>a</u>(ATP/Chla), ATP/ADP, and Chlorophyll <u>a</u>/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 flow 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.en
dc.description.degreeMaster of Scienceen
dc.format.extentix, 155 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-11142012-040232en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-11142012-040232/en
dc.identifier.urihttp://hdl.handle.net/10919/45672en
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1985.T639.pdfen
dc.relation.isformatofOCLC# 12998414en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1985.T639en
dc.subject.lcshAquatic organisms -- Effect of water pollution onen
dc.titleAquatic microbial community responses to stress: comparison of nontaxonomic and taxonomic indicesen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineZoologyen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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