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Articles 241 - 270 of 338
Full-Text Articles in Natural Resources and Conservation
Analysis Of Integrated Farming Systems In Eastern Nebraska, Lori A. Hoagland
Analysis Of Integrated Farming Systems In Eastern Nebraska, Lori A. Hoagland
School of Natural Resources: Dissertations, Theses, and Student Research
Agroecosystems in the U.S. are beset with social, ecological and environmental problems as large industrial farming methods are edging out small family-sized farms and replacing ecological services provided by biodiversity with synthetic inputs and practices. While many of the benefits of smaller diversified or integrated farming systems are well known, farm producers need a concrete model that shows how integration is possible and with what crops. The objective of this study was to investigate some of these supplemental farm activities, and identify and evaluate whether they were compatible given the time and resource constraints of a typical eastern Nebraska farm. …
Effectiveness Of Frightening Devices For Reducing Deer Damage In Cornfields, Jason M. Gilsdorf
Effectiveness Of Frightening Devices For Reducing Deer Damage In Cornfields, Jason M. Gilsdorf
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
A Regional Gis-Based Analysis Of Elk Habitat Suitability In Northeast Nebraska, J W. Fisher
A Regional Gis-Based Analysis Of Elk Habitat Suitability In Northeast Nebraska, J W. Fisher
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
A Regional Gis-Based Analysis Of Elk Habitat Suitability In Northwestern Nebraska, Justin W. Fischer
A Regional Gis-Based Analysis Of Elk Habitat Suitability In Northwestern Nebraska, Justin W. Fischer
School of Natural Resources: Dissertations, Theses, and Student Research
The need to accurately assess the use and suitability of elk (Cervus elaphus spp.) habitat at regional scales will continue to increase as human development encroaches into what was once optimum elk habitat. The objectives of this research were to calculate the relative proportions of habitat use by elk in the Pine Ridge region of Northwestern Nebraska from a set of radio-collared elk locations and generate a habitat suitability model. Habitat variables (Iandcover type, aspect, slope, distance to a road, road density, and distance from the ponderosa pine edge) were measured for each elk location (n = 5,787 dating …
Influence Of Light And Nutrients On Atrazine Toxicity To Freshwater Algae, Crystal J. Hansen
Influence Of Light And Nutrients On Atrazine Toxicity To Freshwater Algae, Crystal J. Hansen
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Effects Of Binary Combinations Of Herbicides On Freshwater Algae, Jill K. Taylor
Effects Of Binary Combinations Of Herbicides On Freshwater Algae, Jill K. Taylor
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Movement Of Rainbow And Brown Trout In Relation To Water Quality And Food Availability In Lake Ogallala, Nebraska, Corey M. Huxoll
Movement Of Rainbow And Brown Trout In Relation To Water Quality And Food Availability In Lake Ogallala, Nebraska, Corey M. Huxoll
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Effects Of Woody Cover In The Landscaping On Riparian Avifauna And A Preliminary Nesting Assessment, Micah W. Perkins
Effects Of Woody Cover In The Landscaping On Riparian Avifauna And A Preliminary Nesting Assessment, Micah W. Perkins
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Movements And Habitat Use By Hatchery-Reared Pallid Sturgeon In The Lower Platte River, Nebraska, Vaughn A. Snook
Movements And Habitat Use By Hatchery-Reared Pallid Sturgeon In The Lower Platte River, Nebraska, Vaughn A. Snook
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Ecological And Physiological Factors Affecting Nesting Success Of Burrowing Owls In Buffalo Gap National Grassland, Randall L. Griebel
Ecological And Physiological Factors Affecting Nesting Success Of Burrowing Owls In Buffalo Gap National Grassland, Randall L. Griebel
School of Natural Resources: Dissertations, Theses, and Student Research
The western burrowing owl (Athene cunicularia hypugea) has been declining throughout much of its range, and in some areas, quite dramatically. In the Great Plains region, these declines appear to be closely associated with declines in prairie dog numbers. Most research to date has taken place on relatively small, fragmented prairie dog colonies. The objectives of this study were to analyze burrowing owl reproductive performance (i.e., clutch size, brood size, and number fledged), and nestling body condition in relation to nest level and colony level factors in Buffalo Gap National Grassland, South Dakota. Buffalo Gap contains large prairie …
Ecology Of Elk In The Pine Ridge Region Of Northwestern Nebraska: Seasonal Distribution, Characteristics Of Wintering Sites, And Herd Health, Michael A. Cover
Ecology Of Elk In The Pine Ridge Region Of Northwestern Nebraska: Seasonal Distribution, Characteristics Of Wintering Sites, And Herd Health, Michael A. Cover
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Changes In Primary Production Of Pawnee Reservoir As A Result Of Reservoir Aging, Kristopher A. Fischer
Changes In Primary Production Of Pawnee Reservoir As A Result Of Reservoir Aging, Kristopher A. Fischer
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Investigating Ground And Surface Water In The Republican River Basin Of Nebraska Using Water Chemistry And Environmental Isotopes, Jennifer J. Schellpeper
Investigating Ground And Surface Water In The Republican River Basin Of Nebraska Using Water Chemistry And Environmental Isotopes, Jennifer J. Schellpeper
School of Natural Resources: Dissertations, Theses, and Student Research
Recent legal battles concerning water use initiated an investigation of the stream/aquifer relationships in the Republican River Basin located in southwest Nebraska. Ground and surface water was analyzed for tritium, deuterium, 18O, and major ions. Temperature, pH, conductivity and alkalinity were determined on-site. Samples were collected during 1997 and 1998 from irrigation wells throughout the entire basin. Localized interactions between groundwater and surface water were examined during twenty-four hour pump tests performed on the irrigation wells screened in the alluvium along the river valley and its tributaries. These data show there are differences between the ground and surface waters …
Ecology Of Elk In Northwestern Nebraska: Demographics, Effects Of Human Disturbance, And Characteristics Of Calving Habitat, Bruce A. Stillings
Ecology Of Elk In Northwestern Nebraska: Demographics, Effects Of Human Disturbance, And Characteristics Of Calving Habitat, Bruce A. Stillings
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Local And Landscape Factors Affecting Nest Site Selection And Nest Success Of Burrowing Owls In Western Nebraska, Rebecca T. Ekstein
Local And Landscape Factors Affecting Nest Site Selection And Nest Success Of Burrowing Owls In Western Nebraska, Rebecca T. Ekstein
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Soil Moisture Within The Windbreak/Crop Interface And A Comparison Of Three Types Of Sensors For Measuring Soil Water Content, Qingjiang Hou
Soil Moisture Within The Windbreak/Crop Interface And A Comparison Of Three Types Of Sensors For Measuring Soil Water Content, Qingjiang Hou
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Central Platte River Forests: Breeding Birds And Woody Vegetation, Barbara K. Good
Central Platte River Forests: Breeding Birds And Woody Vegetation, Barbara K. Good
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Factors Affecting The Movements Of Rainbow Trout (Oncorhynchus Mykiss) In Lake Ogallala, Nebraska, Tadd M. Barrow
Factors Affecting The Movements Of Rainbow Trout (Oncorhynchus Mykiss) In Lake Ogallala, Nebraska, Tadd M. Barrow
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Birds And Agroecological Relationships In Organic And Non-Organic Farmland, Nancy A. Beecher
Birds And Agroecological Relationships In Organic And Non-Organic Farmland, Nancy A. Beecher
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Landowner And Tourist Attitudes Toward Elk Management In The Pine Ridge Region Of Northwestern Nebraska, R. Daniel Crank
Landowner And Tourist Attitudes Toward Elk Management In The Pine Ridge Region Of Northwestern Nebraska, R. Daniel Crank
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Influence Of Buffer Strip Width And Composition In Reduction Of Agricultural Non-Point Source Contaminants, Tim Schmitt
Influence Of Buffer Strip Width And Composition In Reduction Of Agricultural Non-Point Source Contaminants, Tim Schmitt
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Biology Of Shovelnose Sturgeon, Scaphirhynchus Platorynchus, In The Lower Platte River, Nebraska, Robin L. Hofpar
Biology Of Shovelnose Sturgeon, Scaphirhynchus Platorynchus, In The Lower Platte River, Nebraska, Robin L. Hofpar
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Effects Of Ultraviolet Radiation On Attached Diatom Growth And Distribution, Heather Lynn Emsley Hatsell
Effects Of Ultraviolet Radiation On Attached Diatom Growth And Distribution, Heather Lynn Emsley Hatsell
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Histomorphological Responses Of Red Shiner (Cyprinella Lutrensis) To Atrazine, Terbufos, And Their Mixture, Ibrahim A. Messaad
Histomorphological Responses Of Red Shiner (Cyprinella Lutrensis) To Atrazine, Terbufos, And Their Mixture, Ibrahim A. Messaad
School of Natural Resources: Dissertations, Theses, and Student Research
Alterations of normal histomorphology of fish tissues, behavior, and thermal tolerance are recognized by environmental toxicologists and fish biologists as powerful tools indicating diverse biochemical and physiological changes. Toxicity of atrazine (2-chloro-4-ethylamino-6-isopropylamino-1,3,5-triazine), terbufos (S-(((1,1-dimethyl-ethyl)thio)methyl)O,O-diethyl phosphorodithioate), and their mixture to red shiner (Cyprinella lutrensis) at 23$\sp\circ$C and 30$\sp\circ$C was investigated in 14-d bioassays after 14-d acclimation. During the bioassays, fish behavior, indications of toxicosis, and external anomalies were observed. After the bioassays, the critical thermal maximum (CTM) was determined. Fish also were preserved for examinations of gill, liver, and kidney tissues using scanning electron microscopy (SEM) and light microscopy (LM). SEM …
The Effects Of Wet Meadow Fragmentation On Grassland Birds, Christopher J. Helzer
The Effects Of Wet Meadow Fragmentation On Grassland Birds, Christopher J. Helzer
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Propagation Of Juniperus For Conservation Plantings In The Great Plains, Scott Allen Lee
Propagation Of Juniperus For Conservation Plantings In The Great Plains, Scott Allen Lee
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
The Biology Of Alewife Alosa Pseudoharengus In Lake Ogallala, Nebraska, Eric A. Laux
The Biology Of Alewife Alosa Pseudoharengus In Lake Ogallala, Nebraska, Eric A. Laux
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Growth And Yield Of Snap Beans (Phaseolus Vulgaris L.) As Affected By Shelterbelts And Planting Dates, Mohd Nazip Suratman
Growth And Yield Of Snap Beans (Phaseolus Vulgaris L.) As Affected By Shelterbelts And Planting Dates, Mohd Nazip Suratman
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Thermal Tolerances Of Platte River Fishes: Field And Laboratory Studies, Brett P. Fessell
Thermal Tolerances Of Platte River Fishes: Field And Laboratory Studies, Brett P. Fessell
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.
Chronic Effects Of Baseflow Levels Of Atrazine On Platte River Algae, Karen J. Nelson
Chronic Effects Of Baseflow Levels Of Atrazine On Platte River Algae, Karen J. Nelson
School of Natural Resources: Dissertations, Theses, and Student Research
No abstract provided.