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  • Keyword = cyanobacteria.
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Records 1 to 25 of 255

The Impacts of Potassium Permanganate and Powdered Activated Carbon on Cyanotoxin Release (JOURNAL)
The U.S. Environmental Protection Agency (USEPA) undertook a series of bench-scale trials with the following objectives: (1) Expose suspensions of Microcystis aeruginosa (M. aeruginosa) to potassium permanganate (KMnO4) doses of 1, 3 and 5 mg/L, at contact times of 15, 30 and 90...
Water Quality and Microbial Dynamics in a Large Building Hot Water System and Managing Potential Risk Associated with Legionella - Atlanta (PRESENTATION)
Premise plumbing (PP) includes that portion of the drinking water distribution system (DWDS) connected via the service line to houses and other buildings. Water quality in PP is not monitored by U.S. EPA regulation with the exception of the Lead and Copper Rule. Because public ...
Water Quality and Microbial Dynamics in a Large Building Hot Water System and Managing Potential Risk Associated with Legionella (PRESENTATION)
Premise plumbing (PP) includes that portion of the drinking water distribution system (DWDS) connected via the service line to houses and other buildings. Water quality in PP is not monitored by U.S. EPA regulation with the exception of the Lead and Copper Rule. Because public ...
Harmful Algal Bloom Response (PRESENTATION)
A presentation to be given at the 2018 APHL Annual Meeting and Twelfth Government Environmental Laboratory Conference. Harmful algal blooms or HABs are overgrowth of cyanobacteria in water bodies. These bacteria produce several harmful toxins (called cyanotoxins) that have detri...
Conventional Treatment Options for HABs Impacted Waters, Atlanta (PRESENTATION)
This presentation presents data describing: (1) the removals of cyanobacterial cells through coagulation, flocculation, sedimentation and filtration, at the pilot- and full-scale; (2) the impact of powdered activated carbon on the removal of cyanobacterial toxins; (3) the impact ...
Cyanobacteria Assessment Network (CyAN) (NASA Applied Sciences Water Resources Team Meeting) (PRESENTATION)
Specific goals: • Create a systematic method to detect cyanobacteria blooms using satellite data • Develop an information dissemination system for expedient public health advisory postings • Understand the connections between health, economic, and environmental ...
Cyanobacteria Assessment Network - Mobile device application for monitoring cyanobacteria harmful algal blooms using Sentinel-3 satellite Ocean and Land Colour Instruments (PRESENTATION)
The Cyanobacteria Assessment Network (CyAN) is a multi-agency (NASA, USGS, NOAA, and EPA) project and its mission supports the environmental management and public use of U.S. lakes and reservoirs by providing a capability of detecting and quantifying algal blooms using satellite ...
The Cyanobacteria Monitoring Collaborative: Multi-Tiered Approach to Citizen Science Based Cyanobacteria Monitoring (PRESENTATION)
Cyanobacteria (sometimes referred to as blue-green algae) are tiny organisms that can be found in diverse environments ranging from deserts to oceans. Under the right conditions cyanobacteria can spread quickly, forming dense “blooms” on a waterbody’s surface. ...
Conventional Treatment Options for HABs Impacted Waters, Cincinnati (PRESENTATION)
The presentation contains results of bench-scale trials conducted in EPA laboratories, as well as the results of field visits by EPA personnel to drinking water treatment facilities. The presentation will focus on drinking water treatment options for waters impacted by harmful a...
Cyanobacterial community structure changes with seasonal mixing and dissolved oxygen dynamics in three urban eutrophic lakes. (PRESENTATION)
Nutrients contribute to the development of toxic cyanobacterial blooms yet information about other drivers is needed to better predict when and where blooms will occur. We monitored cyanobacterial community dynamics in three Gulf Coast urban lakes. The SW and SE lakes were both...
Overview of HABs Research Program (PRESENTATION)
This presentation is an overview of the cyanobacteria/harmful algal blooms research currently being performed within the Office of Research and Development's Safe and Sustainable Water Resources research program. The presentation highlights results in the following areas: lake m...
Measuring Total Microcystins in Fish Tissue using the 2-methyl-3-methoxy-4-phenylbutyric acid (MMPB) procedure - Minneapolis (PRESENTATION)
There are limited methods for the analyses of multiple algal toxins in aquatic food webs, phytoplankton, zooplankton, periphyton, macroinvertebrates, forage fish, bottom feeders and top carnivore fish. Algal toxins in freshwater systems do not necessarily occur as single contamin...
US Environmental Protection Agency Efforts to address Harmful Algal Blooms (HABs) Impacting Drinking and Recreational Waters (NEWSLETTER ARTICLE)
This is a short article for a European cyanobacteria newsletter that discusses EPA efforts in the following areas: toxin monitoring in public water systems, toxin guidance values in drinking and recreational waters, and research in the areas of treatment, monitoring, methods deve...
pH dependent octanol–water partitioning coefficients of microcystin congeners (JOURNAL)
Hazardous algal blooms can generate toxic compounds with significant health impacts for exposed communities. The ubiquitous class of algal toxins known as microcystins exhibits significant heterogeneity in its peptide structure, which has been minimally studied, given the signifi...
Interspecific and intraspecific diversity and interaction of cyanobacteria throughout a bloom (PRESENTATION)
Using high throughput 16S rRNA gene sequencing of samples from a complete bloom cycle, Cyanobacteria had five main genera, Planktothrix, Aphanizomenon, Dolichospermum, Microcystis and Cylindrospermopsis, along with three minor genera Anabaena, Oscillatoria, and Leptolyngbya. Many...
Cylindrospermopsin toxicity in mice following a 90-d oral exposure (JOURNAL)
Cylindrospermopsin (CYN) is a toxin associated with numerous species of freshwater cyanobacteria throughout the world. It is thought to have caused an episode of serious illness in Australia through treated drinking water, as well as lethal effects in livestock exposed to water ...
A critical review of the postulated role of the non-essential amino acid, β-N-methylamino-L-alanine, in neurodegenerative disease in humans (JOURNAL)
The compound BMAA (β-N-methylamino-L-alanine) has been hypothesized to play a significant role in four serious neurological diseases in humans: Amyotrophic Lateral Sclerosis/Parkinsonism Dementia Complex (ALS/PDC) found on Guam, and ALS, parkinsonism, and dementia that occur glob...
Flow cytometry microscopy and hyperspectral imaging of microcystis, cyanobacteria and algae (PRESENTATION)
The detection of algae and cyanobacteria is an important step in assessing water quality. Studies were initiated using microscopy, flow cytometry and hyperspectral imaging with two fresh water species that could be grown in the laboratory: Microcystis Aeruginosa (cyanobacteria),...
Flow Cytometry, Microscopy and Hyperspectral Imaging of microcystis, Cyanobacteria, and Algae- SETAC (PRESENTATION)
The detection of cyanobacteria algae, and picoplankton, in water is an important step in assessing water quality. Studies were initiated using fluorescence microscopy, flow cytometry and hyperspectral imaging with two fresh water species that were cultured in the laboratory:Micr...
Using water quality to assess ecological condition in the St. Marys River and Huron-Erie Corridor (PRESENTATION)
The St. Marys River and Huron-Erie-Corridor were assessed by EPA for the first time in 2014-2016 as part of the National Coastal Condition Assessment (NCCA). NCCA uses a probabilistic survey design to allow unbiased assessment of ecological condition across the entire Great Lakes...
An approach to monitoring cyanobacteria blooms at surface drinking water intakes using satellite imagery (10th National Monitoring Conference) (PRESENTATION)
Cyanobacterial blooms occur worldwide and are associated with human respiratory irritation, undesirable taste and odor of potable water, increased drinking water treatment costs, loss of revenue from recreational use, and human illness as a result of ingestion or skin exposure du...
Satellite-based monitoring of cyanobacteria blooms from 2002–2011 for 11 reservoirs with watersheds along an agricultural gradient (PRESENTATION)
Imagery acquired by the Envisat Medium Resolution Imaging Spectrometer from 2002-2011 was used to estimate cyanobacteria cell densities for 11 reservoirs in Indiana, Ohio, and Kentucky, USA (surface areas 8–43 km2; 864 total images spanning May–September). This initia...
Using Satellite Data to Monitor the Impacts of CyanoHAB Events on Drinking Water: A Texas Case Study (PRESENTATION)
Overview of CYAN and it's mission to support the environmental management and public use of U.S. lakes and estuaries by providing a capability of detecting and quantifying algal blooms and related water quality using satellite data records.
Lakes, landscapes, and R: A framework for open science on freshwater cyanobacteria (PRESENTATION)
In the last several years scientific reproducibility has been a hot topic with several fields openly struggling with reproducing and replicating research results. One of the key tools to address reproducibility is the use of open source software. Increasingly in ecology, the R ...
Spatial and Temporal Dynamics of Cyanobacterial Blooms in Two Rhode Island Ponds. (PRESENTATION)
Cyanobacteria are natural components of freshwater ecosystems. When conditions are favorable (e.g., high nutrient inputs), cyanobacteria can form dense blooms that have negative effects on human and animal health, ecosystem functioning, and aesthetics. When blooms occur they can ...