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 30 for “"Cyanobacterial blooms."”.
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Quantitative Mapping of Cyanobacterial Blooms Using Oceansat-1 OCM Satellite Data
… for remote characterization of cyanobacteria blooms because of their seasonal occurrence. This dissertation makes a contribution to research methodology pertaining to atmospheric correction of satellite data and development of remote sensing algorithms to quantify cyanobacterial pigments. The …
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Investigating drivers of cyanobacterial blooms in Aotearoa – New Zealand lakes using sedimentary ancient DNA
… cyanobacteria over other photosynthetic taxa. As cyanobacterial blooms are becoming more frequent and intense throughout the world, more lake systems are being investigated. In some cases there is not a clear link between eutrophication and cyanobacterial blooms. One such example is Lake Pounui …
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Phytoplankton community structure and cyanobacterial blooms in reservoirs in the semi-arid highlands of Tigray, Ethiopia
… by high nutrient loads and phytoplankton blooms, including cyanobacteria blooms. This has indeed observed in a field survey of reservoirs, most of them suffer from heavy blooms of cyanobacteria. In this study we started with a field survey of a set of 32 shallow semi-arid sub-tropical …
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Effects of Low Bioavailable Nitrogen and Phosphorus on Cyanobacteria Dynamics in Eutrophic Lake Erie
… and 2011 indicated that N (and not P) constrains cyanobacterial growth during August and September when nitrate concentrations are very low. Experiments conducted during 2012 showed that N-limited cyanobacterial blooms are able to utilize many forms of N. However, nutrient dilution assays …
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Nutrients and their role in promoting cyanobacterial growth along the Murray River, Australia
… the phytoplankton community and regulating cyanobacterial blooms. In riverine environments, the prevalence of cyanobacterial blooms has increased, therefore the need to understand how nutrients are interacting with phytoplankton is significant. The macronutrients nitrogen (N) and phosphorus …
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Distinguishing cyanobacteria from algae using bio-optical remote sensing
… the use of remote sensing for eutrophication and cyanobacterial bloom detection in inland and near-coastal waters. The hypothesis that prokaryotic cyanobacteria can be systematically differentiated from algae (or eukaryotic species) on the basis of their distinctive bio-optical features is tested …
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Structural dynamics of community gene expression In a freshwater cyanobacterial bloom over a day-night cycle
… Microcystis aeruginosa over a day-night cycle. Cyanobacterial blooms are a major problem in eutrophic lakes and reservoirs, negatively impacting the ecology of the water body through oxygen depletion upon bloom decay and in some cases through production of toxins. Waterborne Cyanobacterial …
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Recruitment from resting stages among bloom-forming cyanobacteria
Cyanobacteria are known to form heavy blooms in eutrophicated freshwaters and also form resting stages, associated with the sediments, during harsh growth conditions. These resting stages can serve as inoculum for pelagic populations and function as a potential source for bloom formations. However, …
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An Ecological Approach to Feed Management in Fish Rearing Ponds
… St. Marys hatchery, has been plagued by toxic cyanobacterial blooms in recent summers. To help the St. Marys hatchery staff identify the best times to fill and flush their catfish ponds with Grand Lake water, I quantified the seasonal phosphorus (P) dynamics in the reservoir. Phosphate-P …
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Empirical Relationships between Water Quality and Agricultural Land Use in Rural Maine
… including in Maine, and can result in toxic cyanobacterial blooms, decreased water clarity, and fish kills. I developed a statistical relationship to quantitatively link agricultural intensity in the catchment and resultant water quality outcomes in Maine lakes. I observe a strong statistical …
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Lipidų ir fikobiliproteinų kiekiai gėlavandenių planktono melsvabakterių biomasėje, surinktoje vandens žydėjimų laikotarpiu /
… and eutrophication are leading to more frequent cyanobacterial blooms, which can have negative consequences. Therefore, it is necessary to find ways to control them. One of these solutions is to collect the excess cyanobacteria biomass during the bloom period using devices designed for this …
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Raman Spectroscopy for Monitoring of Microcystins in Water
Cyanobacterial blooms are of great concern to the drinking water treatment industry due to their capacity to produce microcystins and other cyanotoxins that are deadly to humans, livestock, pets, and aquatic life at low doses. Unfortunately, the strategies currently employed for cyanotoxin …
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The Impact of Nitrogen Additions On Cyanobacterial Abundance In Stormwater Detention Ponds On Kiawah Island, Sc
… and anoxia, fish kills, and harmful algal blooms). Cyanobacterial blooms (Microcystis aeruginosa, Anabaena sp, and Oscillatoria sp.) are common in the summer and late fall in this region, and nitrogen loading has been implicated as the cause. The purpose of this study was to quantify the …
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Benthic and pelagic responses to endobenthic bioturbator (Kraussillichirus kraussi) density, temperature and eutrophication in a global change mesocosm experiment
… to coastal eutrophication by limiting harmful cyanobacterial blooms. However, warming-induced declines in microphytobenthic biomass may have important implications for sediment stability and trophic resource availability for benthic feeders under future global change scenarios. Findings from …
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Assessing the use of Viviparus georgianus snails as a means for biomanipulation of cyanobacterial species Microcystis aeruginosa
Cyanobacterial blooms can produce toxins which can be fatal to organisms, including humans. Biomanipulation of cyanobacterial harmful algal blooms (CHABs) aims to proactively prevent their formation by maintaining continuous foraging pressure on cyanobacterial populations by increasing the number …
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Drivers And Dynamics Of Harmful Algal Blooms: Understanding Nitrogen Fixation And Bloom Composition In Minnesota Temperate Lakes
… Among these microbial communities, harmful algal blooms (HABs), dominated by cyanobacteria capable of producing toxins, have emerged as a growing environmental concern due to their impacts on water quality, ecosystem services, and human health. Historically, phosphorus has been considered the …
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Organic Phosphorus Dynamics and Contributions to Eutrophication in a Shallow, Freshwater Bay
… loading, may disrupt this balance causing blooms of phytoplankton to flourish, often resulting in harmful environmental and anthropogenic consequences. Accordingly, reduction of external P loading has been commonly implemented with a recent focus on sediment-bound legacy P that is mobilized …
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Monitoring eutrophication in the Vaal Dam using satellite remote sensing
… and monitor the threats of eutrophication and cyanobacterial blooms within the Vaal Dam. A 10-year archive of remotely sensed satellite data was collected from the medium resolution imaging spectrometer full resolution (MERIS FR) satellite from 2002 to 2012. Data products on chlorophyll-a, …
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Spatio-temporal characterization of a complete algal bloom event using fluorescence spectroscopy in tandem with conventional physico-chemical methods
… and geographic distribution of algal and cyanobacterial blooms has been observed over the last two decades, threatening marine and freshwater ecosystems. In situ fluorometers have been proposed for their potential to provide early warning of bloom development through the analysis of …
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Investigation of novel methods to remove the cyanotoxin, Cylindrospermopsin, from drinking water.
… reach high biomass levels and form toxic algal blooms. These toxins, known as cyanotoxins, are produced as secondary metabolites by several cyanobacterial species. Cyanotoxins affect not only aquatic ecosystems but also impact on human health. The current work focuses on the cyanotoxin …
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