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.
Results
Showing 1 to 20 of 29 for “"Grazing Intensity"”.
-
Effect of grazing intensity on the degree of use of range grasses in Flint Hills Bluestem pastures
Call number: LD2668 .T4 1952 D31
-
Effect of grazing intensity on the degree of use of range grasses in Flint Hills Bluestem pastures
Call number: LD2668 .T4 1952 D31
-
Effects of Grazing Intensity and Temporal Application of Grazing Treatments on Nongame Birds in North Dakota Mixed-Grass Prairie
Grazing occurred naturally in the northern Great Plains and influenced many natural processes in grassland ecosystems, including the habitat selection of breeding birds. Grazing, mainly for livestock production, is still an important land use practice and is one that impacts millions of hectares on …
-
Assessing land degradation and land use in the Libyan Al-jabal Alakhdar region.
… dry biomass and plant palatability, to describe grazing intensity. The environmental impact of these human activities in natural areas can now be applied. Spatial changes were explored using a further model with the universal soil loss equation (USLE), which was independently verified in both …
-
The foraging strategy of Diadema antillarum (Philippi) (Echinodermata: Echinoidea)
… experimentally as well as the effects of urchin grazing intensity on algal primary productivity and the numbers of algal species surviving. Tagging experiments demonstrate that homing behavior exists for these urchins. A simple model is presented to summarize factors regulating Diadema …
-
Substrate dependant survivorship of Ecklonia maxima, in southern African kelp communities
… may occur through episodic recruitment escaping grazing pressure. In areas with low grazing intensity, recovery from catastrophic storms may be limited by competition with understorey algae.
-
Long-term analysis and appropriate metrics of climate change in Mongolia
… humidity. Chapter 3 discusses a case study of grazing intensity on surface energy budgets. To evaluate the land atmospheric interactions over the grassland area depending on the different grazing intensity I conducted the case study over the Shortgrass Steppe Long-Term Ecological Research site …
-
The Influence of Livestock grazing on Plant Species Diversity and Distribution at Kiranjeranje Ward-Kilwa District
… correspondence analysis (CCA) revealed that Grazing intensity(r =-0.9439), silt(r = -0.7282), sand(r=0.7886) and clay(r = -0.7607) are Environmental variables with much influence on species distribution in the study area The Shannon - Weaver species diversity index was used to find the a- …
-
Impact of black swan grazing and anthropogenic contaminants on New Zealand seagrass meadows
… New Zealand estuaries during the last century. Grazing by the black swan (Cygnus atratus) and anthropogenic contaminants resulting from catchment development are postulated to contribute to seagrass meadow loss in New Zealand and these factors have been assessed in this study. The aim of this …
-
Land-use effects on plant biodiversity and carbon cycling in seasonally dry tropical forests in north-eastern Brazil
… (Petrolândia). In the dry forests, the grazing intensity was quantified for each plot. The diversity of perennial plant species was recorded on a 20 m × 20 m plot (abundance). Herbaceous species were assessed on four subplots (each 2 m × 2 m) using the Braun-Blanquet cover-abundance …
-
Monitoring biodiversity of San Francisco Peninsula grasslands using Lepidoptera as a bioindicator
… Peninsula: herbicide application, conservation grazing, and prescribed fire. In this paper, I will evaluate the use of the taxa Lepidoptera as a bioindicator of biodiversity to assess the environmental impacts of these techniques. The application of herbicide is the most commonly used vegetation …
-
Avian Land-Use Associations in the Eastern Mediterranean
… of this attributable to declines in marginal low-intensity crops on which much avian biodiversity depends. Building development appears to be one important driver behind these trends. Changes observed in the distributions of Sardinian Warbler Sylvia melanocephala, a recently established breeder in …
-
Grazing and Climate Effects on High Elevation Meadow Resources
… is important for land managers to understand how intensity and timing of grazing affect the temporal availability of mesic commodities utilized by species like sage-grouse. This dissertation quantifies changes in the timing of availability of mesic sage-grouse resources across grazing and climatic …
-
Demography and leaf physiology of Cornus drummondii in response to disturbance in tallgrass prairie
… such as decreased fire frequency and increased grazing intensity. Clonal shrubs are of particular concern because of their ability to spread via vegetative reproduction and resprout after fire. The demographic mechanisms that underlie shrub responses to climate history and disturbance are …
-
Factors influencing the distribution of late-seral woody species along the upper Missouri River in central Montana
… has occurred due to many factors, such as grazing, deforestation, urbanization, invasive plants, pollution, and altered flow regimes. While most riparian research and management has focused on early seral species such as cottonwoods and willows, other woody species, including green ash, …
-
Factors influencing the distribution of late-seral woody species along the upper Missouri River in central Montana
… has occurred due to many factors, such as grazing, deforestation, urbanization, invasive plants, pollution, and altered flow regimes. While most riparian research and management has focused on early seral species such as cottonwoods and willows, other woody species, including green ash, …
-
Cryptic Herbivorous Invertebrates Restructure the Composition of Degraded Coral Reef Communities in the Florida Keys, Florida, USA
… model system for my study of the effects of grazing by cryptic herbivores on community composition and their potential restoration value. I had four major objectives: (1) determine the suitability of <em>Maguimithrax spinosissimus</em> for manipulating grazing intensity on reefs (Chapter 2); …
-
Modelling the spatial and temporal dynamics of upland birds in Scotland
… Data, collected as part of an ongoing grazing field experiment, were analysed to construct a Bayesian model of population growth, and predict the effect of grazing intensity on meadow pipit populations. Results suggest grazing has a significant impact on population growth. Grazing may …
-
A System Dynamics Model of Soil Carbon Stock and Flows in Grasslands Under Climate and Grazing Scenarios.
… flows in response to grass species composition, grazing intensity, and temperature and precipitation changes at the landscape level. While there are other biogeochemical models in existence, they are either meant to model large areas, including globally, or are meant to be at a farm level and …
Page 1 of 2