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dc.creatorDodson, Brett Wayne
dc.date.accessioned2012-06-07T22:58:59Z
dc.date.available2012-06-07T22:58:59Z
dc.date.created2000
dc.date.issued2000
dc.identifier.urihttp://hdl.handle.net/1969.1/ETD-TAMU-2000-THESIS-D64
dc.descriptionDue to the character of the original source materials and the nature of batch digitization, quality control issues may be present in this document. Please report any quality issues you encounter to digital@library.tamu.edu, referencing the URI of the item.en
dc.descriptionIncludes bibliographical references (leaves 79-82).en
dc.descriptionIssued also on microfiche from Lange Micrographics.en
dc.description.abstractWater column characteristics of three coastal cave systems in Quintana Roo, Mexico on the Yucatan Peninsula were profiled from January 1996 to July 1997. A Hydrolab Data Sonde 3 Multiprobe Logger was used to acquire in situ water column data on temperature, salinity, dissolved oxygen, and pH of the caves. Water columns were divided into three zones, brackish, transition, and saline, and a new method was employed to define these boundaries by using "best it" calculations and subsequent regression coefficients for comparisons. Profiled Hydrolab data displayed the striking and perennially stratified nature of these cave systems while statistical analyses revealed their highly dynamic character. Temperature profiles remained stable and persistent throughout the study. In these systems the presence of a thermal discontinuity or thermocline, is the norm. Salinity profiles exhibited sharp density gradients, or haloclines, one to three meters in thickness. Dissolved oxygen concentrations were consistently low and revealed negative heterograde oxygen curves, otherwise known as oxygen minima, residing at the transition zone. Hydrogen ion concentrations (pH) varied and also displayed a marked decrease at the transition zone. Transition zone thickness changed considerably over time and from system to system. Statistical analysis indicated a significant difference in temperature, salinity, DO, pH, and transition zone depth from profile to profile and between dry and rainy seasons.en
dc.format.mediumelectronicen
dc.format.mimetypeapplication/pdf
dc.language.isoen_US
dc.publisherTexas A&M University
dc.rightsThis thesis was part of a retrospective digitization project authorized by the Texas A&M University Libraries in 2008. Copyright remains vested with the author(s). It is the user's responsibility to secure permission from the copyright holder(s) for re-use of the work beyond the provision of Fair Use.en
dc.subjectwildlife and fisheries sciences.en
dc.subjectMajor wildlife and fisheries sciences.en
dc.titleWater column characterization of anchialine caves in Quintana Roo, Mexicoen
dc.typeThesisen
thesis.degree.disciplinewildlife and fisheries sciencesen
thesis.degree.nameM.S.en
thesis.degree.levelMastersen
dc.type.genrethesisen
dc.type.materialtexten
dc.format.digitalOriginreformatted digitalen


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