Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 109 for “"rangelands"”.
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Phenologic Assessment of Western South Dakota Rangelands
… and biomass data for western South Dakota rangelands was determined using MODIS normalized difference vegetation index (NDVI) imagery. Validation of remotely sensed data was conducted through a variety of field data sets 1) pasture scale long term plant community and biomass data, 2) gross …
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THE POLICY OF EXPERIMENTAL STEWARDSHIP ON PUBLIC RANGELANDS.
Between July and September, 1985, 70 ranchers, environmentalists and agency officials participating in three chartered Experimental Stewardship Program (ESP) areas were interviewed. Committee records and agency documents were also examined. As a result of the field work three conclusions were …
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Computer aids for reclaiming eastern surface mines as rangelands
An eastern range management concept was developed and demonstrated for coal surface mined lands. An objective weighting methodology was employed to determine the optimum forage species mixture to seed surface mined sites. With the optimum mixture determined, total costs for establishment, total …
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Future potential net primary production trends of contiguous United States rangelands
Rangelands are an important ecosystem covering nearly 24% of the earth’s terrestrial vegetation. Climate change is predicted to affect many of the factors that influence the production of rangeland vegetation. Understanding future trends and patterns in net primary production (NPP) requires …
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Future potential net primary production trends of contiguous United States rangelands
Rangelands are an important ecosystem covering nearly 24% of the earth’s terrestrial vegetation. Climate change is predicted to affect many of the factors that influence the production of rangeland vegetation. Understanding future trends and patterns in net primary production (NPP) requires …
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Landscape scale measurement and monitoring of biodiversity in the Australian rangelands
… monitor biodiversity in the extensive Australian rangelands; currently however, there is no method capable of achieving this goal. There are two potential sources of relevant data that cover the Australian rangelands, and from which measures of biodiversity might be extracted: traditional …
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Patterns of plant diversity and their management across South African Rangelands
… effects across the mesic to semi-arid rangelands east of the escarpment in southern Africa. Results were compared to a well studied North American tallgrass prairie, Konza. Sampled between 1 m2 and 1000 m2 across 25 sites, species and family richness increased with mean annual …
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Climatic influences on sagebrush establishment in Arid Rangelands: Applications for rangeland rehabilitation.
… it on abandoned mine sites and degraded rangelands. The transition of intact sagebrush ecosystems to ecologically damaged rangelands is especially problematic because it degrades wildlife habitat, reduced biodiversity and potentially alters ecosystem function (Davies and Svejcar 2008). …
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Living in the moss. Mesofaunal communities of Racomitrium lanuginosum in Icelandic rangelands
… known as the bryosphere. In northern rangelands, large herbivores such as sheep and reindeer can disturb the moss layer by trampling, grazing and waste deposition. However, the effect of large herbivores on the arthropod mesofauna in the bryosphere has yet to be explored. The aim of …
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Seasonal dispersal tendencies of sylvan deer mice (peromyscus maniculatus) with montana rangelands
We examined seasonal dispersal habits of sylvan deer mice (Peromyscus maniculatus) within two Montana rangeland types over a three - year period. The rangeland types included a grassland and shrub-steppe habitat. Within the state of Montana, both habitat types commonly contain peridomestic settings …
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Seasonal dispersal tendencies of sylvan deer mice (peromyscus maniculatus) with montana rangelands
We examined seasonal dispersal habits of sylvan deer mice (Peromyscus maniculatus) within two Montana rangeland types over a three - year period. The rangeland types included a grassland and shrub-steppe habitat. Within the state of Montana, both habitat types commonly contain peridomestic settings …
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An integrated modelling approach for sustainable management of semi-arid and arid rangelands
… management strategies for semi-arid and arid rangelands is acute as non-adapted grazing strategies lead to irreversible environmental problems such as desertification and associated loss of economic support to society. In such vulnerable ecosystems, successful implementation of sustainable …
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Post-Wildfire Vegetation Response on Diverse Rangelands in Northeast California: Does Livestock Grazing Management Matter?
… in 18 diverse fires on northeast California rangelands. Overall, rest from livestock grazing increased perennial graminoid cover and areas not rested from livestock grazing had lower species diversity 16 years after fire. Annual graminoid cover and B. tectorum cover decreased with …
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Managing herbivory over space and time: consequences for vegetation and cattle responses in African rangelands
… composition and ecosystem function in African rangelands, however the extent to which managing the movement of herbivores, specifically livestock, over time and space can sustain functioning and productive rangelands remains unclear. Previous research on forms of rotational grazing management …
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Impact of lifestock on vegetation and soil nutrients around water points in Highland Savanna rangelands, Namibia
… effects in typically arid and semi-arid rangelands where permanent natural surface water is scarce or absent for provision of livestock farming in dry lands Namibia. The impact of livestock grazing on the vegetation and soil status was studied along a grazing gradient from watering points …
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The Status and Conservation Potential of Carnivores in Semi-Arid Rangelands, Botswana The Ghanzi Farmlands: A Case Study
The persistence of many species of carnivore may depend on their survival outside protected areas where they come into conflict with humans and their livestock. Knowledge of these wildlife populations and of the perceptions and attitudes of the stakeholders in the areas in which they live is of …
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Sheep in the Land of Fire and Ice- Socio-economic aspects of sheep grazing on highland rangelands in Iceland
… economic aspects of sheep grazing on highland rangelands in Iceland in relation to sustainable land use practices by means of a literature review. Socio-economic aspects refer to the economic environment of sheep husbandry in Iceland, agricultural policies, laws and regulations on the subject, …
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Evaluating the Effectiveness of a South Texas Rangeland Curriculum on Student Knowledge, Understanding, and Appreciation
Rangelands are an important part of the ecological, social and cultural aspects of Texas heritage, and as students appear to be losing touch with the outside world, it is increasingly important to expose these students to rangelands communities. The purpose of this study was to evaluate the …
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Expanding grasslands? Structural biome shifts in the dryland rangelands of the eastern Karoo revealed through long-term observation of climate, vegetation and land use change
Biome shifts caused by climate and land use change threaten global dryland ecosystems and the provision of services needed to sustain human livelihoods. The overarching drivers of early 20th century dryland degradation in South Africa have been attributed to high stocking rates and overgrazing by …
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