Browsing by Issue Date
Now showing items 21-40 of 4271
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Variation in benthic community structure: the role of the macroenvironment along a downstream gradient.
(1984)McKittrick Creek, a discontinuous mountain-desert stream in Guadalupe Mountains National Park, Texas, was sampled at discrete 1 ocations(pools ) to test for differences among biomass, density, species diversity, equitability, ... -
Phytoplankton productivity of tropical Lake Chapala, Mexico.
(1985)Phytoplankton productivity and other environmental variables were measured for one year (June 1983 - June 1984) at five stations on Lake Chapala, Mexico. Contrary to expectations, productivity in this shallow, tropical ... -
The relationship of turbidity and organic matter to bacterial productivity and biomass in a small Texas lake.
(1986)The relationship between water turbidity and bacterial cell synthesis, specific production and bacterial productivity was investigated in a small Texas reservoir. Sampling dates were selected to include a variety of ... -
Biological nitrogen fixation in a nitrogen limited tropical lake, Lake Chapala, Mexico.
(1987)The objective of my study was to quantify the rate of biological nitrogen fixation in Lake Chapala, Mexico. Lake Chapala is the largest lake in Mexico. It is an ancient, tropical lake which is shaped in an east-west ... -
The role of zooplankton - phytoplankton community interactions in the nutrient dynamics of Lake Chapala, Mexico.
(1988)I investigated ammonia nitrogen (NH^-N) regeneration and grazing by zooplankton and their effects on phytoplankton production and biomass. Two sets of experiments were conducted on samples from Lake Chapala, Mexico ... -
Land acquisition in Coryell County, Texas, for the formation of Camp Hood, 1942-45 : a civilian perspective.
(1988-05)This thesis examines the acquisition of land in Coryell County, Texas, for the formation of Camp Hood during the years 1942 through 1945. It focuses on the effects that event produced on property owners who surrendered ... -
Extracellular organic carbon from Eichhornia crassipes (Mart.) Solms: does water hyacinth leak organic carbon?
(1990)Aquatic macrophytes leak photosynthetically-fixed carbon as dissolved organic molecules. This leakage of organic carbon appears to be an energetically inefficient process. However macrophyte extracellular organic ... -
The effect of clay minerals on cadmium toxicity to bacterial production.
(1990)The effect of clays on cadmium toxicity to bacterial production and specific production was investigated in Lake Brazos, McLennan County, Texas. Bacterial production calculated from ^H-thymidine incorporation rates in ... -
Applications of full rank factorization to solving matrix equations.
(1992-12)In the study of matrices, we are always searching for tools which allow us to simplify our investigations. Because full rank factorizations exist for all matrices and their properties often help to simplify arguments, their ... -
Bacterial growth on UV-B photolytically produced dissolved organic matter.
(1995)The effect of ultraviolet radiation into the Lake Chapala trophic processes was investigated in this study. Responses of bacterial populations to changes in UV radiation exposed water were significantly greater (bacterial ... -
How does the material adsorbed onto flood-borne sediment affect lake zooplankton populations?
(1997)The effect of materials adsorbed onto flood-borne sediments on Brachionus calyciflorus was investigated in this study. Sediment samples were collected from the North Bosque River and South Bosque River which drain into ... -
Phytoplankton production dynamics in nutrient pulsed systems.
(1997)Phytoplankton production is determined by light and inorganic nutrients which govern the biomass of primary producers. These variables are a function of watershed rainfall periodicity and water quality from the run-off ... -
The effect of the exotic cladoceran Daphnia lumholtzi on the native zooplankton of a central Texas reservoir.
(1997)Waco reservoir was sampled for one year at five sample sites and six months at two sample sites in an attempt to detect competition between D. lumholtzi and native zooplankton. No competition could be detected. Also ... -
Hypolimnetic oxygen decline and the hypolimnetic bacterial community.
(1998)This study reports on bacterial cell size and abundance change during oxygen depletion of Belton and Stillhouse Hollow reservoir. Bacterial cell size and abundance are compared with amount of heterotrophic nanoflagella ... -
Using community metabolism to define the riverine, transition, and lacustrine zones of a reservoir, Lake Waco, Texas.
(2001)Community metabolism of the pelagic region of Lake Waco was measured in different areas in order to define the riverine, transition, and lacustrine zones with a biological indicator. Community metabolism was measured ... -
Community needs assessment among the Gujjars in Northern India.
(2002)The perceived needs of the Gujjars of northern India were investigated in the Gurdaspur District of Punjab, India. The purpose of this study was to provide baseline data on the Gujjars who migrate to and from the states ... -
Gravitoelectrodynamics of Charged Grains in Saturn's F Ring: Encounters with Prometheus and Pandora
(Journal of Physics A, 2003-09-12)The dynamics of Saturn's F ring have been a matter of curiosity ever since Voyagers 1 and 2 sent back pictures of the ring's unusual features. Some of these images showed three distinct ringlets with the outer two displaying ... -
Digital Imaging and Analysis of Dusty Plasmas
(Advances in Space Research, 2004)Dust particles immersed within a plasma environment, such as those found in planetary rings or cometary environments, will acquire an electric charge. If the ratio of interparticle potential energy to average kinetic energy ... -
Dusty Plasma Correlation Function Experiment
(Advances in Space Research, 2004)Dust particles immersed within a plasma environment, such as those in protostellar clouds, planetary rings or cometary environments, will acquire an electric charge. If the ratio of the inter-particle potential energy to ... -
A model of coagulation in dust clouds during grain charging
(Advances in Space Research, 2004)Initially uncharged grains in space and laboratory plasma environments become charged due to currents driven by potential differences in the dusty plasma. Certain macroscopic effects such as coagulation of smaller grains ...