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 12 of 12 for “"Vegetation models"”.
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Two-patch herbivore/vegetation models with density-dependent migration
In this thesis we constructed two mathematical models for herbivore/vegetation interactions in environment of two patches, using the metaphysiological approach and a density-dependent migrations. In the first model we considered the case when the environment is constant, and we constructed a system …
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Development and interrogation of approaches to modelling xylogenesis with a view towards their suitability for inclusion in Dynamic Global Vegetation Models
… to increased understanding and predictability of vegetation responses to changes in the environment. This is achieved via the development and interrogation of wood formation process formulations suitable for resolving hitherto missing growth processes in Dynamic Global Vegetation Models (DGVMs). …
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A Framework for Site Analysis with Emphasis on Feng Shui and Contemporary Environmental Design Principles
… the site analysis process into different models, incorporates each model, and considers the interaction between them. The most important models are the environmental models (climate, geology, hydrology, topography, and vegetation models), social-cultural models, economic models, and …
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Impacts of meteorology-driven seed dispersal on plant migration : implications for future vegetation structure under changing climates
… the capability of simulating the dynamics of vegetation structure across the global landscape as accurately as possible. In order to serve these needs, Dynamic Global Vegetation Models (DGVMs) are used to describe the current status of vegetation structure and biogeography as well as estimate …
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Land surface response to climate change forcing over Southern Africa
… and all-year-round rainfall. There are steep vegetation gradients and a wide range of vegetation types adapted to suit the variable climate. These factors, combined with the societal implications of changes in the climate and land surface systems, make southern Africa a challenging and …
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Atmosphere-vegetation interactions over South Africa
… sensitivity of the atmospheric circulation to vegetation change over South Africa in the context of the portended global warming. This is achieved using a vegetation model driven by climate change information and subsequently incorporated within a general circulation model (GCM). The …
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The response of southern African vegetation to droughts in past and future climates
… climate change pose a threat to southern African vegetation. This study examines the response of southern African vegetation to drought in both past and future climates. Multiyear and multi-simulation datasets from three dynamic global vegetation models (DGVMs), namely, Community Land Model …
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Mapping elk distribution on the Canadian prairies: Applying local knowledge to support conservation
… mixed-wood and deciduous forests and herbaceous vegetation. Models developed with LEK only, biotelemetry collar data only and a combined dataset were all validated against an independent dataset of elk crop damage locations. All models predicted elk presence well. The RSF scores of the LEK only …
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Bridging ecophysiological trade-offs and population dynamics - How competition and climate shape community structure
… disturbances and climate on the development of vegetation community structure and diversity patterns. To answer these research questions the model DIVE (Dynamics and Interactions of VEgetation) has been developed. It determines population dynamics of plant communities while calculating the …
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Determining the Influence of Abiotic and Biotic Predictors on Ecological Niche Models
… and are typically excluded from ecological niche models (ENMs). However, the role such interactions play in shaping species distributions is increasingly recognized, sparking the development of methods for their integration into ENMs.</p> <p>Among the most common approaches are those that limit …
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Monitoring of Plant Chlorophyll and Nitrogen Status Using the Airborne Imaging Spectrometer AVIS
… sensing enables not only spatial monitoring of vegetation cover, but also the derivation of individual plant constituents such as chlorophyll and nitrogen content. These are important parameters for optimised agricultural management on a field basis through the possibility of spatially …
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Hydraulic Resistance due to Emergent Wetland Vegetation
Models to estimate hydraulic resistance due to vegetation in emergent wetlands are crucial to wetland design and management. Hydraulic models that consider vegetation rely on an accurate determination of a resistance parameter such as a friction factor or a bulk drag coefficient. At low Reynolds …