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Comparative Ecology of Benthic Communities in Natural and Regulated Areas of the Flathead and Kootenai Rivers, Montana

Description: A comparative study was made of environmental variables and the density, biomass, diversity, and species composition of macroinvertebrates in areas downstream from a dam with a hypolimnetic release (Hungry Horse Dam on the Flathead River) and a dam with a selective withdrawal system (Libby Dam on the Kootenai River). A major objective of this study was to examine the response of macroinvertebrate communities to defined environmental gradients in temperature, flow, substrate, and food-related va… more
Date: May 1984
Creator: Perry, Sue A.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Job Satisfaction of Secondary School Principals in the Rivers State of Nigeria

Description: This study addresses these questions: (1) What is the relationship between secondary school principals' job satisfaction and their ages, educational level, salary, and years of experience on the job, size of school, and location of school? and (2) What is the relationship between two instruments that measure job satisfaction--The Job Descriptive Index (JDI) and The Job in General (JIG).
Date: May 1986
Creator: Maduagwu, Samuel Nwankwo
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Effects of Pulp and Paper Mill Wastewaters on Phytoplankton Primary Productivity in the Red River, Louisiana

Description: Responses of phytoplankton productivity in the Red River to unbleached pulp and paper mill wastewaters were monitored using in situ ^14C incubation. Preoperational studies, conducted prior to the discharge of mill wastewaters varied seasonally, but revealed similar productivity trends when compared with postoperational studies, conducted after mill discharges began entering the Red River. Carbon assimilation rates measured downstream of mill discharge were generally greater than upstream levels… more
Date: May 1984
Creator: Holler, Jeffrey Dee
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Interspecific Competition Between Hygrophila polysperma and Ludwigia repens, Two Species of Importance in the Comal River, Texas

Description: Hygrophila polysperma is a plant native to Asia that has been introduced into the Comal River, TX and is thriving while Ludwigia repens, a species native to the river appears to be declining. Both plants have similar morphologies and occupy similar habitats in the river. Two plant competition experiments were conducted to examine the competitive interactions between the two species. First, an experimental design was developed in which established Ludwigia plants were 'invaded' by sprigs of Hygr… more
Date: May 1999
Creator: Francis, Matthew D.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Multiple Regression Equations to Estimate Mean Nutrient Concentrations in Streams of North Central Texas from Landsat Derived Land Use

Description: Nutrients are of critical concern in water quality assessment. The development of empirical models to estimate mean nutrient concentrations, based on satellite derived land use, could aid water resource managers. Models using land use acreages outperformed those using percentages, and discrete urban land uses were superior to lumped urban. Regressions of the combinations of two, three and four of the eight possible land use variables were investigated. Sensitivity analyses, with one stream dele… more
Date: May 1994
Creator: Kerr, Barry Douglas
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Distribution, Abundance, and Food Habits of Larval Fish in a Cooling Reservoir

Description: Analysis of larval fish collected at four stations in a 330-ha cooling reservoir indicated Dorosoma spp. were most numerous at all stations, followed by Lepomis spp. and Percina Macrolepida. Largest numbers and greatest diversity of larval fish were found at the station least affected by thermal effluent; the mid-lake station provided the smallest numbers and least diversity. The two warmwater stations were intermediate, with similar numbers and diversity. Diversity and abundance of zooplankton… more
Date: December 1978
Creator: Mitterer, Lana Gayle
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Limitation of Primary Productivity in a Southwestern Reservoir Due to Thermal Pollution

Description: Evidence is presented to support the conclusions that (1) North Lake reservoir is less productive, contains lower standing crops of phytoplankton and total organic carbon than other local reservoirs; (2) that neither the phytoplankton nor their instantaneously-determined primary productivity was detrimentally affected by the power plant entrainment and (3) that the effect of the power plant is to cause nutrient limitation of the phytoplankton primary productivity by long-term, subtle, thermally… more
Date: August 1977
Creator: Stuart, Tom J.
Item Type: Refine your search to only Thesis or Dissertation
Location: 32.941831 -96.978633
Partner: UNT Libraries
open access

Epistemological, Ontological, and Ethical Dimensions of Biocultural Rights: The Case of the Atrato River, Colombia

Description: In 2016, the Colombian Constitutional Court recognized the Atrato River as a subject of rights based on the theory of biocultural rights. This dissertation analyzes a new legal concept that aims to defend the rights to a good life for humans and other-than-human co-inhabitants who share river ecosystems, focusing on the case of the Atrato River in Colombia. The 3Hs framework of biocultural ethics is adopted to interconnect complex and interrelated historical, biophysical, cultural, and politica… more
Date: August 2022
Creator: González Morales, Valentina
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Importance of Red River in the History of the Southwest

Description: For four hundred years the Red River Valley has been the battleground between contending Indian tribes and European races, and for almost three hundred of these years the river has been a disputed boundary line, either between rival nations, or between neighboring states of our country. The river has never been of much importance as a commercial route, yet very few rivers in all the United States have played so an important and persistent a part in this history of their sections as the Red Rive… more
Date: August 1940
Creator: Rains, Cleo
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Comparative Chemistry of Thermally Stressed North Lake and Its Water Source, Elm Fork Trinity River

Description: To better understand abiotic dynamics in Southern reservoirs receiving heated effluents, water was analyzed before and after impoundment in 330 ha North Lake. Macronutrients, metals, and chlorinated hydrocarbons were measured. Concentrations of nutrients and metals in sediments were quantified in this 2 yr study. River water prior to impoundment contained 16 times more total phosphorus, and supported 23 times more Selenastrum capricornutum cells in an algal assay than reservoir water. The reser… more
Date: December 1976
Creator: Sams, Barry L.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Responses of Fishes to a Low pH Environment

Description: Data were collected from natural and introduced fishes present in Ferndale Lake, a small (120 ha) sport fishing reservoir in Camp County, east Texas. Levels of pH measured in the lake during the study period ranged from 3.5 to 5.3. Monthly field surveys and experimental manipulations were designed to evaluate quantitatively the signs of stress at various biological levels. Lethal limits to low pH were quantified for largemouth bass (Micropterus salmoides) and bluegill (Lepomis macrochirus) to b… more
Date: August 1981
Creator: Prete, Philip J. (Philip John)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Trans-boundary river basins: a discourse on water scarcity, conflict, and water resource management.

Description: This thesis is an inquiry regarding the interconnections between water scarcity, geopolitics, resource management, and the strategies for developing effective ways to resolve conflict and encourage sustainable water resource use in developing countries. The ecological services of trans-boundary rivers are explored in conjunction with the potential impacts to freshwater availability due to economic modernization, water resource development, and decision making regimes that determine how water is… more
Date: December 2003
Creator: Riley, Timothy
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

The Making of a Princeps: Imperial Virtues in Monumental Propaganda

Description: This thesis demonstrates key imperial virtues communicated on Roman Imperial triumphal monuments. A closer examination of monuments located in Rome reveals the presentation of personality traits such as military valor, piety, and mercy through symbolism, nature scenes, and personifications of abstract qualities. Each monument is dedicated to an emperor and exemplifies his virtues. The representation of imperial virtues conveys an emperor's worth to the public by communicating his better qualiti… more
Date: August 2020
Creator: Wetzel, Julia L
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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