Science Inventory

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Records with

  • Keyword = harmful algal blooms OR HABs.
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Records 1 to 25 of 239

US Environmental Protection Agency HABs Research (PRESENTATION)
This presentation was developed to present a broad overview, accompanied by examples, of the current state of harmful algal bloom (HAB) research in the Office of Research and Development. This presentation will be delivered as part of a webinar sponsored by the National Environm...
Critical Review of Eutrophication Models for Life Cycle Assessment (JOURNAL)
This paper evaluates the current state of life cycle impact assessment (LCIA) methods used to estimate potential eutrophication impacts in freshwater and marine ecosystems and presents a critical review of the underlying surface water quality, watershed, marine, and air fate and ...
Comparison of Physical and Community Structure of Biofilm under the Influence of Humic Substances and Algal Organic Matter in Simulated Drinking Water Distribution Systems (PRESENTATION)
The growth of microorganisms is one of the great challenges for safe drinking water delivery. In drinking water distribution systems (DWDS), about 95% of bacteria tend to attach to the pipe interior surface to form biofilms. The biofilm occurrence in the DWDS might cause a series...
High Frequency Monitoring of cyanoHABs Dynamics (PRESENTATION)
USEPA’s Office of Research and Development has partnered with the Clermont County, OH Water Resources Department in an on-going study to assess HAB trends and develop monitoring tools and approaches. Lake Harsha, a multi-use reservoir and primary drinking water source in so...
Assessing the Impact of Algal Organic Matter on the Performance of Biological Filtration Systems (PRESENTATION)
Most drinking water treatment processes that rely on conventional treatment methods such as coagulation/flocculation and media filtration, have proven to be unsuccessful in the removal of cyanotoxins. Thus, source water contaminated by cyanotoxins as secondary metabolites and alg...
Use of passive samplers for the detection of extra cellular algal toxins in stream mesocosms, lakes and streams (PRESENTATION)
The purpose of this study is to evaluate SPATTs and LF nsPSDs to determine their performance in determining extracellular algal toxins in both stream mesocosms and within Lake Harsha and its downstream habitats. PSDs were deployed at the end of 16 different stream mesocosms and ...
Ecological Role of Microcystin: Evidence from a Field Study (NALMS 2018) (PRESENTATION)
A presentation of some important findings from an investigation into the ecological function and triggers of microcystin production. Our approach combined molecular genetic tools and systems ecology.
USING THE LAKE-CATCHMENT (LAKECAT) DATASET TO CHARACTERIZE, MODEL, AND PREDICT LAKE CONDITIONS ACROSS THE CONTERMINOUS US (PRESENTATION)
Lake conditions are influenced by both natural and human-related landscape features. Understanding how these features vary within contributing areas (i.e., watersheds) can advance our understanding of how lake conditions vary spatially and improve the use, management, and restora...
Forecasting Microcystis aeruginosa population dynamics from bacterioplankton DNA (PRESENTATION)
The ability to forecast harmful algal blooms (HABs) in freshwater lakes and rivers is becoming critical for management of drinking water treatment and recreational activities. In Harsha Lake, located in southwestern Ohio, Microcystis aeruginosa is believed to be the dominant cyan...
Updates on Using Multi-media Modeling to Investigate Conditions Leading to Harmful Algal Blooms (PRESENTATION)
The area of focus is Lake Erie, the shallowest, warmest, and most biologically active of the Great Lakes. The lake provides drinking water for 12 million people in the U.S. and Canada. Agriculture, tourism, commercial fishing, and recreational activities are a few of the ecosyste...
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...
How Landscape Source, Sink, and Transport Interactions Mediate Nitrogen and Phosphorus Across a Large River Basin (PRESENTATION)
A watershed’s hydrologic landscape can, in part, be conceptualized as a series of storage nodes (e.g., wetlands, floodplains) and edges (e.g., flowpaths). These nodes and edges interact to influence nutrient transport to aquatic systems – and these interactions can be...
Natural infrastructure in large river basins: quantifying nutrient and hydrologic effects using “big” data and modeling (PRESENTATION)
Integrating natural infrastructure into traditional stormwater and nonpoint source nutrient management is gaining popularity, particularly for challenges such drinking water protection and solutions to harmful algal blooms. This approach often involves a balance of maintaining in...
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...
An initial validation of Landsat 5 and 7 derived surface water temperature for U.S. lakes, reservoirs, and estuaries (JOURNAL)
The United States Harmful Algal Bloom and Hypoxia Research Control Act of 2014 identified the need for forecasting and monitoring harmful algal blooms (HAB) in lakes, reservoirs, and estuaries across the nation. Temperature is a driver in HAB forecasting models that affects both ...
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...
Research Update: Nutrient Management and Control (PRESENTATION)
Presentation to be given at the 2018 Nutrients Permitting Workshop, Columbus, OH. Presentation Outline: U.S. EPA, ORD Overview Research Plans – Safe and Sustainable Water Examples: Green Infrastructure Performance Monitoring LCA of Nutrient Control Technologies Nutrient Con...
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 ...
The time scale of resilience-based forecasts and their potential use (PRESENTATION)
It is notoriously difficult to predict abrupt changes involving critical transitions (a type of regime shift), and these changes include management-relevant events like fisheries, collapses, and harmful algal blooms. However, recent theoretical and experimental work suggests that...
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 ...