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  • Keyword = cyanobacteria.
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Records 1 to 25 of 267

Using the Sentinel-2 satellite for remote sensing of chlorophyll-a in U.S. lakes (PRESENTATION)
Using the Sentinel-2 satellite for remote sensing of chlorophyll-a in U.S. lakes Chlorophyll-a concentration can serve as a proxy for phytoplankton biomass, an indicator of increased anthropogenic nutrient stress, and a measure of nuisance algal blooms. Here, we compare chlorop...
Cyanobacteria Assessment Network (CyAN) (Presentation to the LA DEQ ) (PRESENTATION)
The timely distribution of satellite derived data is necessary for adaptive water quality management decision making. Prompt dissemination of remotely sensed water quality data enables public warnings within days and the ability to issue seasonal assessments in the same calendar ...
Ocean Color Applications (PRESENTATION)
The U.S. Environmental Protection Agency, National Aeronautics and Space Administration (NASA), National Oceanic and Atmospheric Administration (NOAA), and the U.S. Geologic Survey (USGS) are collaborating to provide an approach for mainstreaming satellite ocean color capabilitie...
Validation of Sentinel-2 maximum chlorophyll-a index for U.S. waters (PRESENTATION)
Chlorophyll-a concentration can serve as a proxy for phytoplankton biomass, an indicator of increased anthropogenic nutrient stress, and a measure of nuisance algal blooms. Here, we compare chlorophyll-a concentrations derived from satellite imagery to those obtained by in situ s...
Development of methods for Measuring Total Microcystins in Fish Tissue using the 2-methoxy-3-methyl-4-phenylbutyric acid (MMPB) procedure. (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 contami...
Cyanobacterial nitrogen fixation and phosphorus scavenging during a HAB forming (2018 NALMS) (PRESENTATION)
The efforts towards reduction of nutrient contamination of surface waters has greatly gained attention to mitigate increasing incidences of harmful cyanobacterial blooms (HABs), but little attention has been paid on the roles and importance of N2-fixation and phosphorus scavengin...
Assessing the impact of cyanobacterial harmful algal blooms on drinking water intakes across the United States. (PRESENTATION)
Satellite data has been found to be an effective way to quantify cyanobacterial harmful algal blooms (cyanoHAB). CyanoHABs are a significant environmental concern. High abundances of cyanoHABs in aquatic ecosystems can be detrimental to human health through exposure during recrea...
Cyanobacteria in sediments of Harsha Lake (PRESENTATION)
In 2015 and 2016 sediment samples were collected from several locations in Lake William H. Harsha. Sediment samples from 2015 were analyzed for DNA associated with cyanobacteria. Samples from both years were assayed for a variety of physico-chemical characteristics. Samples we...
Analysis of Life Cycle within Various Strains of Cyanobacteria with a Focus on Internal Regulators and Toxin Production (PRESENTATION)
Examine influence of nutrient availability on life cycle progression and morphology. Step-wise analysis of internal regulators, nutrient constraints, toxin production, and morphology through Cell Isolation.
Spatial and Temporal Dynamics of Cyanobacterial Blooms in 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 ...
Harmful algal bloom smart device application: using image analysis and machine learning techniques for classification of harmful algal blooms (SETAC Europe 2018) (PRESENTATION)
Northern Kentucky University and the U.S. EPA Office of Research Development in Cincinnati Agency are collaborating to develop a harmful algal bloom detection algorithm that estimates the presence of cyanobacteria in freshwater systems by image analysis. Green and blue-green alg...
Generating ecotoxicity information on microcystins and prymnesins: A different approach (SETAC 2018) (PRESENTATION)
There is a lack of information for estimating safe levels for aquatic life concerning the toxicity of natural toxins produced by cyanobacteria and algae. Current literature indicates the LC50s for Microcystin LR range from 1 – 21 mg/L. There is even less ecotoxicity informa...
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...