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Item Description Byappananhalli, Muruleedhara N. en_US 2012-03-15T18:55:48Z 2012-03-15T18:55:48Z 2000-12 en_US
dc.identifier.citation Byappanahalli, MN. 2000. Assessing the persistence and multiplication of fecal indicator bacteria in hawai'i soil environment. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. en_US
dc.description Includes bibliographical references (leaves 227-244). en_US
dc.description.abstract Traditional fecal indicator bacteria such as fecal coliform, E.coli and enterococci have been shown to be unreliable indicators of the hygienic quality of recreational waters under tropical conditions. One of the major reasons for considering these bacteria as ineffective indicators of water quality in warm, tropical regions is that they are consistently found in natural environments (plants, soil, water) in the absence of any significant contamination of these environments. Since preliminary studies conducted in Hawaii had indicated soil as the major environmental source of elevated concentrations of these bacteria in environmental waters, the aim of this study was to focus on the soil environment to specifically address two assumptions made by regulatory agencies in using fecal bacteria as indicators of water quality: first, there should not be an environmental source of these indicator bacteria unrelated to sewage or fecal matter contamination, and second, the indicator bacteria do not multiply in the environment. To determine the validity of these two assumptions under tropical conditions in Hawaii and possibly other tropical locations, various experiments were conducted. The major findings are as follows. 1) Analysis of soil samples collected from various locations representing major soil groups on the island of Oahu showed that fecal indicator bacteria are naturally found in most of the soil environments, indicating that the fecal bacteria have adapted to the soil conditions to become part of soil biota. 2) Evidence was obtained to show that the soil contains adequate nutrients to sustain the populations of these bacteria. 3) Growth and multiplication of fecal indicator bacteria in natural soil was dependent on available nutrients (particularly carbon), moisture and competing microorganisms. In conclusion, tropical soil conditions are suboptimal for the multiplication of fecal indicator bacteria. Consequently, these bacteria in natural soil conditions will probably grow and multiply sporadically when conditions are relatively optimal. Although concentrations of fecal indicator bacteria in soil represent only a small fraction of the microbiota, their counts are significant enough in numbers not only to impact the quality of recreational waters but also to nullify two of the assumptions used in the application of recreational water quality standards. Thus, there is a need for an alternate and more reliable indicator of water quality in Hawaii and other tropical locations. en_US
dc.description.sponsorship Department of Health, State of Hawaii; US Environmental Protection Agency en_US
dc.format.extent xxv + 244 pages en_US
dc.language.iso en-US en_US
dc.publisher Water Resources Research Center, University of Hawaii at Manoa en_US
dc.relation Theses for the degree of Doctor of Philosophy (University of Hawaii at Manoa). Microbiology; no. 4010 en_US
dc.relation.ispartofseries WRRC Unedited Reports. en_US
dc.relation.ispartofseries 2000-03 en_US
dc.rights All UHM dissertations and theses are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission from the copyright owner. en_US
dc.subject.lcsh Enterobacteriaceae--Environmental aspects--Hawaii. en_US
dc.subject.lcsh Soil microbiology--Hawaii. en_US
dc.subject.lcsh Environmental indicators--Hawaii. en_US
dc.title Assessing the Persistence and Multiplication of Fecal Indicator Bacteria in Hawai'i Soil Environment en_US
dc.type Thesis en_US
dc.type.dcmi Text en_US
local.identifier.callnumber AC1 .H3 no.4010 en_US

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