Doyle, Robert D. (Robert Donald)Huang, Hui.Baylor University. Dept. of Biology.2007-02-232017-04-072007-02-232017-04-072006-122007-02-23http://hdl.handle.net/2104/4958Includes bibliographical references (p. 62-67).In this study I quantified planktonic and community metabolism of the upper mixed zone along the riverine-lacustrine gradient in four Texas reservoirs from May 2005 to March 2006. Planktonic metabolism was estimated using the laboratory incubation methodology. The diel change of subsurface dissolved oxygen in-situ was used to determine community metabolism. In direct contrast to the predictions of the traditional reservoir zonation model, planktonic P:R ratio in the lacustrine zone was significantly less than one, while planktonic P:R ratios exceeded one in both the riverine and transition zones. Community P:R ratios were less than one in all three zones during the study, indicating net community heterotrophy at all locations. On average the plankton was responsible for 82% of total community production but only 33% of total community respiration. The factors controlling planktonic and community P and R were consistent with previous studies.ix, 67 p. : ill.59853 bytes875089 bytesapplication/pdfapplication/pdfen-USBaylor 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.Freshwater plankton -- Metabolism.Limnology --- Texas.Vegetation dymanics --- Texas.ThesisWorldwide access