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Showing 1 to 20 of 63 for “"Northern Great Plains"”.
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Bison Conservation in the Northern Great Plains
… and composition. Within grasslands, the plains bison (Bos bison) was the most numerous and influential grazer. However, by 1900 bison were reduced to ¡Ü 1,000 animals throughout North America. Today, bison are scattered throughout their historical range, numbering > 500,000 individuals. …
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Bison Conservation in the Northern Great Plains
… and composition. Within grasslands, the plains bison (Bos bison) was the most numerous and influential grazer. However, by 1900 bison were reduced to ¡Ü 1,000 animals throughout North America. Today, bison are scattered throughout their historical range, numbering > 500,000 individuals. …
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Soil Salinity Study in Northern Great Plains Sodium Affected Soil
… marine sediments that underlay portions of the Northern Great Plains have increased the salinization and sodification risks. The objectives of this dissertation were to compare three chemical amendments (calcium chloride, sulfuric acid and gypsum) remediation strategies on water permeability and …
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Competition and Phenology of Invasive and Native Grasses in the Northern Great Plains
Invasive species cause substantial ecological, social, and economic impacts. In South Dakota, Bromus inermis (smooth brome) and Poa pratensis (Kentucky bluegrass) are substantial threats to remnant prairies by forming monotypic stands that are resistant to restoration while decreasing diversity and …
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Saltcedar (Tamarix spp.) in the Northern Great Plains: Seed Ecology and Cultural Considerations
… more commonplace within riparian habitats of the Northern Great Plains (NGP) and has been given “noxious weed” status in many of the states in this region. Little information on the environmental conditions conducive to the establishment of saltcedar specific to this region exists, however. In …
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Thermal and Kinetic Analyses of the Pyrolysis of a Northern Great Plains Lignite
<p>The pyrolysis of Indian Head lignitic coal in argon, carbon monoxide and hydrogen was studied to obtain a kinetic model of the process and to determine heat effects . A Du Pont 910 differential scanning calorimeter and a Du Pont 951 therm ogravim etric analyzer were utilized to measure heat …
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Spatial Variability Analysis and Reclamation of Saline-Sodic Soils in the Northern Great Plains
… of sodic and saline/sodic soils in the Northern Great Plains. The objectives of this dissertation were: 1) determine the impact of surface chemical treatments and cover crop on crop yields and soil remediation; 2) determine and describe soil spatial variability and develop a model to …
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Granivory and Granivores in Native Grasslands and Agropyron Cristatum Stands in the Northern Great Plains
… wheatgrass) is a management concern in the northern Great Plains because of the low plant biodiversity and high stability in A. cristatum stands. Small consumers have the potential to contribute to A. cristatum invasion and stability through granivory and herbivory. Little is known about ant …
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A triadic relationship on the northern Great Plains: bison (Bison bison), native plants, and native people
The dissertation investigates and documents the historic relationship that exists among Bison bison, native plants, and Native People. An exhaustive in-depth review of each ecological component is given. Lakota Indian participants were interviewed for their qualitative knowledge of the three …
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Anthelmintic Screening, Phytochemical Analysis and Cytotoxicity Determination of the Indigenous Plants of the U.S.A. Northern Great Plains
… with the overuse of anthelmintics has created a greater need to look for the alternative source for anthelmintics. Therefore, this thesis focuses on evaluating medicinal plants from the USA Northern Great Plains for anthelmintic activity against <em>H. contortus</em>. Initially, 40 plant extracts …
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A Landscape Approach to Grassland Bird Conservation in the Prairie Pothole Region of the Northern Great Plains
… at local and landscape scales have the greatest chance of success. At landscape scales, conserving and creating grasslands, removing trees from the landscape, or both, increase songbird density. Density of many species is positively related to amount of grassland at the smallest scale …
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A Landscape Approach to Grassland Bird Conservation in the Prairie Pothole Region of the Northern Great Plains
… at local and landscape scales have the greatest chance of success. At landscape scales, conserving and creating grasslands, removing trees from the landscape, or both, increase songbird density. Density of many species is positively related to amount of grassland at the smallest scale …
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Spatial Variability of Saline and Sodic Soils in the Black Glaciated Region of the Northern Great Plains, USA
… increases in salt affected soils in the Northern Great Plains states of South Dakota (SD) and North Dakota (ND), MLRA 55B and 55C, have prompted more intensive research on groundwater derived saline and sodic soil characteristics in semi-humid and humid climates. Past research has focused …
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Raptors in Temperate Grasslands: Ecology of Ferruginous Hawk, Golden Eagle, and Northern Harrier in the Northern Great Plains
… declines in occupancy and breeding performance. Northern harriers (<em>Circus cyaneus</em>) prefer relatively open grasslands and wetland areas of various natures. During the breeding season from 2013–2015, we investigated the influence of factors associated with the landscape on survival and …
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Movements, Resource Selection, And Risk Analyses For Parasitic Disease In An Expanding Moose Population In The Northern Great Plains
<p>Little is known regarding moose ecology in North Dakota, and a decline in moose in northeastern North Dakota may be linked to parasites of white-tailed deer (<em>Parelaphostrongylus tenuis</em> and <em>Fascioloides magna</em>). I investigated the ecology of moose, including the potential effects …
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Environmental Factors Affecting the Landscape-Scale Spatio-Temporal Distribution of Small Mammal Assemblages Across the Northern Great Plains of North America
… pocket mice (Perognathus fasciatus) and northern grasshopper mice (Onychomys leucogaster). Furthermore, I found variation in weather had little influence on deer mouse or sagebrush vole annual abundance, indicating that other factors (i.e., habitat availability) are more responsible for …
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Biological and Agronomic Aspects of Two Insect Predators of Switchgrass
… switchgrass moth larvae in mature stands in the northern Great Plains and if variation in biomass production was associated with variation in frequency of infestation, in two trials (plots/established in 2004 and 2008) and (2) to increase knowledge of the biology of the gall midge by describing …
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An Evaluation of Life History Parameters of White-Tailed Deer (Odocoileus virginianus) in North Dakota
… virginianus) have been documented in the Northern Great Plains, but limited information is available in regions dominated by grasslands. The objectives of our study were to document movements, cause-specific mortality, survival rates, and habitat selection of white-tailed deer. We captured …
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