Prymnesium parvum in inland waters : comparative toxicity, microcystin allelopathy, and toxin photodegradation.

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dc.contributor.advisorBrooks, Bryan W.
dc.contributor.authorJames, Susan Virginia.
dc.contributor.departmentEnvironmental Science.en
dc.contributor.otherBaylor University. Dept. of Environmental Science.en
dc.date.accessioned2009-09-09T14:24:25Z
dc.date.available2009-09-09T14:24:25Z
dc.date.copyright2009-08
dc.date.issued2009-09-09T14:24:25Z
dc.descriptionIncludes bibliographical references (p. 80-87).en
dc.description.abstractThe harmful algal species Prymnesium parvum, a toxin-producing mixotrophic haptophyte, has caused massive fish kills in slightly saline inland Texas water bodies. In the first study, standardized aquatic test models from multiple trophic levels were simultaneously employed to compare sensitivities to P. parvum toxins. Fish mortality was the most sensitive endpoint, though adverse reproduction effects in two invertebrate species were observed; a green algal species was not adversely affected. A second study employed a probabilistic risk assessment approach and examined potential allelopathy of the cyanotoxin microcystin-LR to P. parvum. A concentration of 4,392.8 μg l⁻¹ significantly inhibited P. parvum growth over a portion of the study, which corresponded to a 9% probability of detecting this concentration in the environment. Finally, the effect of sunlight on toxicity of P. parvum cell-free filtrate was assessed. Exposure to eight hours of full or ~50% sunlight eliminated toxicity to Pimephales promelas, suggesting toxin photodegradation.en
dc.description.degreeM.S.en
dc.description.statementofresponsibilityby Susan Virginia James.en
dc.format.extentx, 11-87 p. : ill.en
dc.format.extent844457 bytes
dc.format.extent426303 bytes
dc.format.mimetypeapplication/pdf
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/2104/5428
dc.language.isoen_USen
dc.rightsBaylor University 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. Contact librarywebmaster@baylor.edu for inquiries about permission.en
dc.rights.accessrightsWorldwide accessen
dc.rights.accessrightsAccess changed 10/5/12
dc.subjectPrymnesium parvum -- Toxicology --- Texas.en
dc.subjectToxicity testing.en
dc.subjectAllelopathy.en
dc.subjectPhotodegradation.en
dc.subjectToxic marine algae --- Texas.en
dc.titlePrymnesium parvum in inland waters : comparative toxicity, microcystin allelopathy, and toxin photodegradation.en
dc.typeThesisen

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