Browsing Department of Biology by Issue Date
Now showing items 1-20 of 117
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Pond succession on the Kaibab Plateau, Arizona.
(1969)Quantitative data were obtained for a serai comparison of five sinkhole ponds on the Kaibab Plateau, Arizona. Species diversity, community metabolism, primary production, and relative serai rank were assayed. Information ... -
Uptake and utilization of alanine-1-14C by freshwater algae.
(1969)Experiments were conducted x^ith Chlorella pyrenoidosa, Cosmarium formosulum, and Gloeocapsa sp. to determine their relative heterotrophic capacity at various conditions. Cultures were incubated in nutrient media with ... -
Age and growth of the white crappie, Pomoxis Annularis Rafinesque, in Lake Waco, Texas.
(1969)The major collection of white crappie was from 17 July 1967, to 10 April 1968, by traps and gill nets. Other fish were taken by anglers and seines in June 1968. A total of 1142 fish were included in this study. Spawning ... -
Phytoplankton production in a central Texas reservoir.
(1969)Phytoplankton production and other environmental variables were measured from June to November, 1968 to determine factors affecting production and trophic status of the producer community in a shallow, polymictic, central ... -
Some effects of thermal history on the largemouth black bass, Micropterus salmoides (Lacepede), of two central Texas reservoirs receiving power plant effluents.
(1972)Mean annual growth of the first three age classes of largemouth black bass from Tradinghouse Reservoir was near the average growth reported in the literature for southern waters. Largemouth black bass collected from the ... -
The ostracode Cypridopsis vidua: physiological response due to thermal stress.
(1973)Upper temperature effects were measured on the mean oxygen consumption, carbon dioxide production, ingestion, assimilation, and egestion rates of the ostracode Cypridopsis vidua. to determine positive or negative effects ... -
Structure and photosynthetic response to abrupt thermal stress of a periphyton algal community colonized in a power plant discharge canal.
(1976)Tremendous increases in energy needs have led to construction of many new power plants. Effects of heated power plant effluents on aquatic organisms have not been clearly established, Periphyton community structure was ... -
The production, nitrogen, and phosphorus dynamics of Elodea sp., Potamogeton sp., and Nitella sp. in Sam Rayburn reservoir, Texas.
(1978)The 1977 annual maximum biomass of Elodea sp., Fota- — 2 mogeton sp., and Nitella sp. was found to be 1013.6 g m~ , 168.4 g m **, and 32?.6 g m~'', respectively. Combined, these plants produce 80,528.16 kg dry wt lake”* ... -
The effect of the form and concentration of nitrogen on geosmin production by an aquatic actinomycete (streptomyces isolate WM1C1).
(1983)Actinomycetes are organisms that produce geosmin which is one of the organic compounds responsible for the earthy (musty) odor in water. This study was designed to isolate an actinomycete, confirm it as a geosmin ... -
The effects of phosphorus starvation on phosphate storage, three storage products and cellular organelles of Chlorella pyrenoidosa.
(1983)The ultrastructure of phosphorus starved, phosphorus restored and total nutrient cells of Chlorella pyrenoidosa was described by i morphometric analysis. The rate of phosphorus incorporation into polyphosphate bodies ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
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 ...