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 17 of 17 for “"Toxic Cyanobacteria"”.
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Evaluation Of Toxic Cyanobacteria In Central Florida Stormwater Ponds
… of Florida is no exception to this phenomenon. Cyanobacteria, or blue-green algae, have proven to be of special concern due to its proliferation and potential to produce toxins that are harmful to humans, livestock and wildlife. A casual drive along the roads and in the neighborhoods of central …
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Toxic cyanobacteria, cyanotoxins and drinking water production in Ghana: implications to human health
The management and control of cyanobacteria and their toxins in drinking water reservoirs and water supplies have engaged the attention of many scientists worldwide due to their negative effects on population health. The cyanotoxin, microcystin, the main focus of this research has been responsible …
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Optimizing a long-term monitoring program to track toxic cyanobacteria blooms in a Great Lakes estuary
Recent observations indicate cyanobacterial harmful algal blooms (cHABs) have become increasingly frequent and severe in the St. Louis River Estuary (SLRE) since 2018. Given the novelty of cHABs in the SLRE, the locations, timing, and environmental conditions associated with past cHABs have …
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The Role of Nitrogen and Phosphorus in the Growth, Toxicity, and Distribution of the Toxic Cyanobacteria, Microcystis aeruginosa
… roles of N and P in influencing its growth, toxicity, and distribution. N is far more influential than P in regulating growth, toxicity, and distribution of <em>M. aeruginosa</em>, and ammonium (NH<sub>4</sub>+) is the most bioavailable form of N to <em>M. aeruginosa</em>. Thus, as the …
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The occurrence of toxic and non-toxic cyanobacteria species in water supplies destined for maize meal preparation process: A case study of Vhembe District
Cyanobacteria are common organisms in the phytoplankton of eutrophic rivers, lakes, and freshwater reservoirs, and have become part of human diet for thousands of years. Cyanobacteria can multiply quickly in surface waters and form blooms when favourable conditions prevail, such as high …
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Cyanobacteria harmful algal blooms in South Louisiana estuaries : a synthesis of field research, management implications, and outreach
… has sometimes led to the formation of freshwater cyanobacteria HABs (CyanoHABs). The goal of this dissertation was to look at a field research study of phytoplankton bloom dynamics; management implications for cyanobacteria entering estuaries; and an outreach effort in relation to residents …
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Geochemical and limnological aspects of phosphorous contamination in the Noordhoek Valley, Cape Peninsula
… of the study (Jan-Oct 1998), the occurrence of toxic cyanobacteria of the species Microcystis aeruginosa was reported for the two main water bodies within the wetland. The objective of this study was to conduct an investigation of geochemical and limnological aspects of phosphorus contamination …
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An investigation of the environmental factors that affect water quality and the occurrence of harmful cyanobacteria in stormwater management ponds
… quality treatment and algal growth, including toxic cyanobacteria. Net release of total phosphorus (TP) and net retention of total nitrogen (TN) by SWMP were observed. Flow conditions had little affect on the overall functioning of the study SWMP. Large pond designs and recent dredging were …
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Phytochemistry in the development of pesticides and biocides
… biocides are studied as substitutes for their toxic synthetic ancestors. The botanical pesticides are evaluated as tools intended for integrated crop protection schemes, while the natural biocides for their potential use in residential areas. In this study we evaluate various botanical matrixes …
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A comparative study of the origins of cyanobacteria at Musina Water Treatment Plant using DNA fingerprints
The presence of harmful algal blooms (HABs) and cyanobacteria toxins in drinking water sources are known to pose a great threat to humans. The main aim of this study was to use molecular technique to determine the origins of the cyanobacteria species at Musina raw water abstraction point by …
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Modeling the Spread of Airborne Particles Associated with Harmful Algal Blooms and Plumes of Colored Smoke
… by harmful algal blooms (HABs), caused mostly by toxic cyanobacteria. When people or animals drink the toxic water, it can be damaging to their health, potentially leading to hospitalization or even death. In some cases, these toxins are not just limited to the water, but can become airborne …
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The hydrochemical characterization of the Mgobezeleni catchment in Sodwana Bay
… of dense macrophytes and microalgae, including toxic cyanobacteria species) due to high nutrient composition. The dense macrophytes species together with the cultivated peat, are decomposing to produce high levels of dissolved OM with humic substances (humic acid and fulvic acid) causing the …
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Phytoplankton community structure and cyanobacterial blooms in reservoirs in the semi-arid highlands of Tigray, Ethiopia
… 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 reservoirs in the …
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Investigation of the production and isolation of bioactive compounds from cyanobacteria.
… and adverse climate change the occurrence of toxic cyanobacterial blooms have significantly increased during the last decades. Nodularia spumigena is one of the dominant toxic cyanobacteria which produces massive and inherent blooms in brackish water body, the Baltic Sea, particularly in late …
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Invasive non-native species and the management and exploitation of freshwater ecosystems
… harmful algal blooms (HABs), dominated by toxic cyanobacteria, are becoming increasingly common and often lead to ecosystem collapse and unsafe drinking water. Freshwater ecosystems are also vulnerable to the establishment of invasive non-native species (INNS), whose prevalence has rapidly …
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Paleolimnological Reconstruction of Long-Term Trends in Phototrophic Communities in Prairie Reservoirs
… issues, and the potential production of harmful cyanobacterial toxins. Due to limited historical environmental monitoring data, paleolimnological investigations of Lake Diefenbaker sediments were conducted to assess spatial and temporal environmental trends. Lines of investigation included trends …