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 71 for “"aquatic ecosystem"”.
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Integrating thermoelectric power generation operations with aquatic ecosystem sustainability
… pollution in waterways, adversely affecting aquatic ecosystems. Incorporating biology into the energy-water nexus can aid decision-makers in identifying tradeoffs and more effectively assessing and managing aquatic ecosystems. The central research question in this work is as follows: How can …
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Determining optimal policies for management of an aquatic ecosystem
… state fish and game agency can determine Optimal Ecosystem Policies (OEP). This methodology consisted of: (1) an ecosystem simulation model which depicted a variety of interactions among and between species; (2) an objective function consisting of several criteria; and (3) a computer implemented …
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Model Aquatic Ecosystem Studies of the Environmental Fate and Biodegradability of Industrial Compounds
Made available in DSpace on 2014-12-12T01:27:44Z (GMT). No. of bitstreams: 1 7414576.pdf: 5098759 bytes, checksum: 90095620528c95607d846a398795952b (MD5) Previous issue date: 1974
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Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonate (PFOS) in an Aquatic Ecosystem - Distribution and Fate
… distribution and fate of PFOA and PFOS in an aquatic ecosystem that is not directly affected by fluorochemical production activity. The presented study was mainly focused on the river Roter Main, Bayreuth, Germany, and gives a good picture of the behaviour of PFOA and PFOS in such an aquatic …
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The Biological Implications of The Polychlorinated Biphenyls in The Housefly and Model Aquatic Ecosystem
Made available in DSpace on 2014-12-11T18:05:43Z (GMT). No. of bitstreams: 1 7405654.pdf: 3329281 bytes, checksum: b4b2950656544b055b91aaf9d292ff5c (MD5) Previous issue date: 1973
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Hydroecological connectivity as a normative framework for aquatic ecosystem regulation: lessons from the USA
… slowing the global rate of biodiversity loss and ecosystem degradation. A major factor in this lack of effectiveness has been, perhaps, too narrow a focus on individual elements that exist within ecosystems, rather than on the health of the ecosystems themselves. Additionally, very little …
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Quantifying Terrestrial and Aquatic Ecosystem Methane Emissions with Process-based Biogeochemistry and Atmospheric Transport and Chemistry Models
To improve the quantification of methane emissions from Arctic wetlands and lakes, an integrated modeling framework was developed. It includes a newly developed process-based lake biogeochemical model and a widely used 4-D VAR inversion algorithm implemented with the nested grid high-resolution …
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Aquaria studies on the uptake of arsenic 74 labeled sodium arsenite by components of an aquatic ecosystem
Thesis (M.S.)--Michigan State University. Dept. of Fisheries and Wildlife, 1966
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A multi-scale assessment of aquatic ecosystem processes across the land-ocean-atmosphere continuum: from headlands to the sea
… of earth processes, linking terrestrial, aquatic, marine, and atmospheric reservoirs. Once thought to be passive pipes connecting land to sea, rivers are increasingly recognized as dynamic players in global carbon cycling. Rainfall mobilizes terrestrially-derived components from the …
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Klímaváltozási jelenségek modellezése egy elméleti vízi ökoszisztémában = Modelling of the phenomena of climate change in a theoretical aquatic ecosystem
Napjainkra nyilvánvalóvá vált, hogy az emberi tevékenységek befolyásolni tudják a Föld időjárási és éghajlati viszonyait, az atmoszféra kémiai összetételét. A szervetlen anyagok áramlása és körforgása a légkör és az ökológiai rendszerek között folyamatosan fennáll, így az ember okozta hatások …
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Containers and flows : investigating systems of spatial construction in an aquarium
… edge, becoming the physical filter between the aquatic ecosystem and the civic community. If we consider the aquarium building type as a 'living machine' (i.e., one that needs to sustain life), it can then be described as having a symbiotic relationship with the organisms it sustains . The …
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Determination of Atrazine Concentration in Freshwaters Using Fluorescence Spectroscopy
… herbicides in USA, but its negative impact on aquatic ecosystem cannot be over-looked. Atrazine was traditionally determined through liquid/gas chromatography or IR spectroscopy. However, these methods are either time-consuming or costly, so fluorescence spectroscopy is investigated as a more …
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LANTHANUM-BASED MATERIALS FOR NUTRIENT PHOSPHORUS REMOVAL FROM AQUEOUS SOLUTION: OPTIMIZATION, CHARACTERIZATION AND APPLICATION
… has caused eutrophication, which disrupts the aquatic ecosystem and deteriorates the drinking water quality. Therefore, it is of utmost importance to eliminate the root cause, nutrient phosphorus from water or wastewater effectively and efficiently. Lanthanum metal has been reported to be an …
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Pushing the Boundaries of Freshwater Ecosystem Restoration: Evaluating a Conservation Initiative in Terms of Social-Ecological Resilience
Freshwater ecosystems are among the most transformed systems on Earth despite their critical importance to human well-being. This research utilized a single case, embedded case study design to explore the possibility of an approach to aquatic ecosystem restoration informed by social-ecological …
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Pesticides in the Aquatic Environment
… are ubiquitous contaminants of the freshwater aquatic environment. Pesticide residues are found in varying amounts in all components of the aquatic ecosystem including water, animal and plant tissue and sediments. Organochlorine pesticide residues in water, usually in the parts per trillion …
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Influences of atrazine on gonadal differentiation in Xenopus laevis tadpoles during metamorphosis
… present non observable effect level (NOEL) for aquatic ecosystem of 20og/L atrazine should be reconsidered.
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Mercury air surface exchange flux: A field study in the Bay Saint-Francois wetlands, Quebec, Canada.
… and wildlife at extremely low concentration. Aquatic ecosystem and especially wetlands are important environments for Hg biochemical transformation and cycling. An intensive two-part field study was conducted in the Bay Saint-Francois (BSF) wetlands (Quebec, Canada) from May to September 2003. …
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