Browsing University of Waterloo by Subject "cyanobacteria"
Now showing items 1-13 of 13
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Application and assessment of multi-wavelength measurements of variable chlorophyll a fluorescence for analysis of irradiance stress, physiological state and community composition in freshwater phytoplankton
(University of Waterloo, 2018-04-24)Phytoplankton are a diverse group of organisms of fundamental importance in aquatic ecosystems. Exposure to high levels of photosynthetically active and ultraviolet radiation (PAR and UVR) is unavoidable for most phytoplankton ... -
Automatic Identification of Algae using Low-cost Multispectral Fluorescence Digital Microscopy, Hierarchical Classification & Deep Learning
(University of Waterloo, 2019-12-05)Harmful algae blooms (HABs) can produce lethal toxins and are a rising global concern. In response to this threat, many organizations are monitoring algae populations to determine if a water body might be contaminated. ... -
Coagulant addition for managing sediment-associated phosphorus bioavailability to prevent cyanobacterial blooms in drinking water reservoirs
(University of Waterloo, 2021-08-27)To ensure the uninterrupted supply of adequate amounts of drinking water, many utilities rely on reservoirs for raw (i.e., untreated) water storage prior to treatment. For example, reservoirs are integral to storing water ... -
Ecological Factors Controlling Microcystin Concentrations in the Bay of Quinte, Maumee Bay, and Three Grand River Reservoirs
(University of Waterloo, 2008-01-25)Certain types of cyanobacteria have the potential to produce toxins including microcystin, a hepatotoxin. Toxic cyanobacterial blooms are becoming increasingly common worldwide. They are a concern in the Great Lakes and ... -
Evaluating expected microcystin removal at three Ontario drinking water treatment plants
(University of Waterloo, 2018-09-19)Cyanotoxins are a group of toxins produced by cyanobacteria that can be harmful to human health. Drinking water is a major pathway to exposure and therefore the presence of cyanobacteria and cyanotoxins in drinking water ... -
Identification and characterization of toxic cyanobacteria in two forested maritime watersheds in North America
(University of Waterloo, 2021-06-01)Healthy forested watersheds naturally provide high quality drinking water to communities. However, the integrity and quality of these water sources may be threatened by climate change-exacerbated disturbances such as ... -
Investigating Cyanobacterial Communities Across Canada and Characterizing the Seasonality of Cyanobacterial Toxin and Nitrogen Metabolism Genes in the Turkey Lakes Watershed Using Metagenomics
(University of Waterloo, 2023-08-08)The long evolutionary history of gram-negative cyanobacteria has enabled them to tolerate extreme conditions, succeed in numerous habitats, and exploit special nutrients, all while resisting harmful anthropogenic and climate ... -
Microcystin in Ugandan lakes: Production dynamics, accumulation in fish, and risk evaluation
(University of Waterloo, 2010-12-23)Eutrophication of freshwater lakes has led to an increase in the occurrence of harmful cyanobacterial blooms, and it is expected that a warming climate will further exacerbate the frequency and duration of such blooms. ... -
Molecular characterization of potential geosmin-producing cyanobacteria from Lake Ontario
(University of Waterloo, 2006)Geosmin is an odorous secondary metabolite produced by some cyanobacteria during growth and released from the cells. Little is known about the biosynthesis of geosmin and the gene(s) required for its production have not ... -
Molecular Characterization of Toxic Cyanobacteria in North American and East African Lakes
(University of Waterloo, 2007-09-27)Toxic cyanobacterial blooms constitute a threat to the safety and ecological quality of aquatic environments worldwide. Cyclic hepatotoxin, especially microcystin, is the most widely occurring of the cyanotoxins. The aim ... -
Spatiotemporal Shifts in Cyanobacterial Communities in a Northern Temperate Watershed – Applications of Next-Generation Sequencing and Implications for Monitoring and Climate Change Adaptation
(University of Waterloo, 2021-08-05)Cyanobacteria, a group of photosynthetic bacteria, threaten water quality and drinking water resources globally through the production of potent toxins and the formation of dense surface blooms. These bloom events are ... -
Super-fine Powdered Activated Carbon for the Removal of Microcystin-LR from Drinking Water
(University of Waterloo, 2021-11-24)Harmful algal blooms are considered threats to drinking water quality. During drinking water treatment, suspended and dissolved materials must be removed and treated, and in the case of cyanobacteria, these are intact cells ... -
Treatment of the Cyanotoxin Anatoxin-a via Activated Carbon Adsorption
(University of Waterloo, 2015-05-22)Cyanobacteria are bloom-forming aquatic microorganisms that impact many drinking water sources and can produce a variety of toxins, eponymously termed cyanotoxins. Three cyanotoxins are of particular concern in a North ...