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 72 for “"forest ecosystem"”.
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A study of forest ecosystem development
… taking place with time in a relatively simple ecosystem of Pinus radiata D. Don. on skeletal soils and integrades to Yellow-Brown Sands. Every endeavour was made to keep other soil forming factors (and the influence of other factors on the ecosystem) as constant as possible, thus satisfying the …
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Ground vegetation gross primary production dynamics of a drained peatland forest ecosystem
… were partly drained for agriculture and forestry. In drained peatland forest, beside tree stands, ground vegetation is another relevant component concerning C fluxes between the land and the atmosphere. Thus, to explore ground vegetation gross primary production (GPPGV) dynamics, its …
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Assessment of ecosystem integrity of lowland dipterocarp forest ecosystem using remote sensing
Ecosystem Integrity Index (EII) is a concept to determine the quality or the health of an ecosystem. The EII development can assist forest managers and decision makers in the conservation effort and forest management in Malaysia through the development of a simple and easy-to-adopt index. The aim …
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Wood and soil-atmosphere carbon dioxide fluxes from a tropical forest ecosystem
<p>Carbon cycling in tropical rainforests is an important component of the global carbon budget. A better understanding of controlling mechanisms and magnitude of CO2 sources from tropical forests will improve our ability to predict future impacts of climate changes. The research presented in this …
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Developing manufactured soils for reclamation of mined land in the boreal forest ecosystem
The purpose of this study was to manufacture a cover soil that will be suitable to create ‘cover islands’ of native boreal vegetation for reclamation of large mine rock piles generated through open-pit mining activities in the Boreal Shield region north of Lake Superior. Multiple Technosols were …
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Dynamics of forest ecosystem properties and resilience in a temperate woodland undergoing dieback.
… crucial to understand how fundamental underlying ecosystem properties (EPs) including biodiversity, ecosystem functions and ecosystem services will be impacted. Currently, this knowledge is severely limited, but is essential for future management of forests at both stand and landscape scales. The …
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Hyperspectral Reflectance and Stable Isotopic Nitrogen: Tools to Assess Forest Ecosystem Nitrogen Cycling
… of nitrogenous fertilizers in agricultural and forestry practices coupled with increased fossil fuel combustion and resulting nitrogen (N) deposition across the landscape have contributed to a near doubling of N inputs to terrestrial ecosystems. With such dramatic changes have come adverse …
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Determining the role of plant-soil-microbial relationships in forest ecosystem function and biogeochemistry
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2022-11-11 without embargo terms
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Understanding the role and impact of introduced honey bees in a submontane indigenous forest ecosystem
… in agricultural landscapes, as well as in native ecosystems. While this has obvious benefits for economy and industry, the impacts on sustainability of native ecosystems are less easy to discern. Honey bees (Apis mellifera) have a suite of potential impacts, both positive and negative, on native …
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Forest ecosystem response to environmental pressures along an urban-to-wildland gradient in southwestern Ohio
… effects of these multiple stresses on natural ecosystems poses a major challenge as the world’s urban population continues to increase, and achieving a comprehensive understanding of their impacts is a crucial step in establishing environmentally sustainable strategies for management and …
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The Value of Cooperative Extension's Public Benefit Explored through Enhancements to Forest Ecosystem Services Provision
… programming that benefits the greater community. Forests provide numerous valuable benefits to society through the provision of ecosystem services. Cooperative Extension educational programming positively impacts forest owners, who in turn conduct actions that enhance ecosystem services. A …
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The impact of silvicultural strategies and climate change on carbon sequestration and other forest ecosystem functions
Forests are a key resource serving a multitude of functions such as providing income to forest owners, supplying industries with timber, protecting water resources, and maintaining biodiversity. Recently much attention has been given to the role of forests in the global carbon cycle and their …
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The effects of invasive slender false-brome (Brachypodium sylvaticum) on forest ecosystem function in western New York
… Some species become invasive and can impact ecosystems by changing soil, water, and nutrient dynamics. Disrupting these important ecosystem processes can facilitate further invasion. Slender false-brome (Brachypodium sylvaticum) is an exotic bunchgrass that is invasive in North America. Its …
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The effects of a silvicultural sludge application on small mammal populations and the potential of Giardia contamination in a forest ecosystem
… sludge treatment. Potential contamination of the forest ecosystem by Giardia duodenalis, a parasitic protozoan, was also investigated. Populations of the deer mouse (Peromyscus maniculatus), Oregon vole (Microtus oregoni), Townsend chipmunk (Eutamias townsendii), shrews (Sorex spp.), and a few …
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Stated and Revealed Preference Valuation of Forest Ecosystems
… which can also be applied to make evaluation of forest ecosystem. In the application of these evaluation methodologies, there always exists limitation from the data collection and empirical analysis. In the dissertation here, I extend the traditional evaluation methods with novel design or …
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Exotic Species Invasion and Biodiversity in Bangladesh Forest Ecosystems
… and drivers are two major issues in tropical forest ecosystems. This dissertation deals with these two issues in a tropical forest ecosystem in Bangladesh. Considering the first issue, it comprises two manuscripts: a systematic review and a field survey in Bangladesh forest ecosystem. The …
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Mapping and assessing ecosystem threat status of South African kelp forests
At a global scale, kelp forests play a significant ecological, social and economic role through their provision of ecosystem services. South African kelp forests are no exception and recent studies have established their value. To maintain these benefits, informed management is needed. An …
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Free living nitrogen-fixation in ponderosa pine/Douglas-fir forests in western Montana
… (N) is a primary limiting nutrient in all ecosystems. Therefore, a thorough understanding of N cycling processes in forest ecosystems is required to minimize N losses to fire, harvesting, and other forms of land management. The influence of fire, fire exclusion and forest restoration …
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Free living nitrogen-fixation in ponderosa pine/Douglas-fir forests in western Montana
… (N) is a primary limiting nutrient in all ecosystems. Therefore, a thorough understanding of N cycling processes in forest ecosystems is required to minimize N losses to fire, harvesting, and other forms of land management. The influence of fire, fire exclusion and forest restoration …
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