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Anatoxin-a (ATX) is a neurotoxic cyanotoxin found in freshwater globally. Multiple genera of cyanobacteria can produce anatoxins and include producers associated with planktonic blooms such as Aphanizomenon, Dolichospermum, and Planktothrix and those most associated with benthic ...

Harmful algal blooms are occur frequently in fresh and marine waters. Anatoxin-a (ATX) is a neurotoxin produced by cyanobacteria mainly in freshwater. Human health guidelines are limited by a scarcity of toxicological data although it has caused illness in humans, and illness and...

Harmful Algal Blooms (HABs) are a hazard for coastal environments worldwide; identifying screening thresholds of chlorophyll-a (chl-a) associated with increased risk of HABs is a management priority. Molecular surveillance of coastal phytoplankton and bivalve biotoxins ...

The emergence of "social-ecological systems" thinking has prompted environmental researchers across disciplines to acknowledge the intricate interplay between social and ecological dimensions in studying environmental systems. Despite the growing body of theoretical and...

The biological community of the Laurentian Great Lakes experiences a complex set of stressors, from physical (e.g., altered thermal-oxygen profiles and flash erosion events), biological (e.g. invasive species and harmful algal blooms) and chemical (e.g., legacy and emerging conta...

As part of the 2024 Lake Erie Cooperative Science and Monitoring Initiative field year, staff of EPA-Duluth led water quality sampling, collaborated to generate lower food web data, collected specimens for examination of contaminant bioaccumulation, examined primary producer resp...

The biological community of the Laurentian Great Lakes experiences a complex set of stressors, from physical (e.g., altered thermal-oxygen profiles and flash erosion events), biological (e.g. invasive species and harmful algal blooms) and chemical (e.g., legacy and emerging conta...

Water quality monitoring is integral to preserving the health of freshwater ecosystems, and satellite remote sensing has emerged as one monitoring method. Sentinel-2, in particular, has been valuable for water quality monitoring due to its 5-day global temporal revisit time and s...

Human-driven environmental change has caused harmful algal blooms (HABs) to increase in aquatic ecosystems worldwide, yet our understanding of their impacts on food webs and the fisheries that they support remains incomplete. This information gap is especially conspicuous in Lake...

Background: Cyanobacterial harmful algal blooms (cyanoHABs) pose risks to human and animal health. Methods: We investigated the relationship between cyanoHABs and asthma or wheeze-related emergency department (ED) visits near three Wisconsin cities (Green Bay, Madison, ...

Cyanobacteria have recently been detected in coastal systems in the U.S., with cyanotoxins measured in shellfish in downstream estuaries at levels of concern for human health. Goal 4 of EPA’s draft Harmful Algal Blooms (HABs) Strategy highlights EPA’s critical role in the Advanc...

The Cyanobacteria Assessment Network (CyAN) is a multi-agency, satellite-enabled program that delivers daily, national-scale monitoring, summary metrics, and forecasting of cyanobacterial harmful algal blooms (cyanoHABs) for thousands of U.S. lakes using 300 m Sentinel-3 OLCI obs...

This is a presentation to be given for the HABs, Hypoxia, and Nutrients Research Webinar. The presentation shows that wildfire smoke contains high amounts of nutrients compared to non-smoke days. The elevated phosphorus is particularly notable relative to non-smoke measurements. ...

The Cyanobacteria Assessment Network (CyAN) is a multi-agency, satellite-enabled program that delivers daily, national-scale monitoring, summary metrics, and forecasting of cyanobacterial harmful algal blooms (cyanoHABs) for thousands of U.S. lakes using 300 m Sentinel-3 OLCI obs...

In 2024/2025 spatially balanced probability surveys for benthic HABs were conducted in five different systems. Here we use the preliminary results of the survey of the Hanford and Richland Sections of the Columbia River near the Tri-Cities, WA to provide context and an update to ...

In 2024 a spatially balanced probability survey for benthic HABs was conducted in the Hanford and Richland Sections of the Columbia River near the Tri-Cities, WA. Thirty nine sites were visited late September and mid October. Surface water grab samples were taken at each. A trans...

Cyanobacterial blooms, once rare in the St. Louis River estuary, are becoming more common. Bloom-associated toxins (cyanotoxins) may cause deleterious effects in humans, but effects are unknown for many other species. This is due in part to the limited number of species used in t...

Spring 2025 Puget Sound Liquid chromatography mass spectrometry (LCMS) algal toxin concentration results from aqueous and solid phase adsorption toxin tracking (SPATT) samples 

This Dataset includes the spatial and temporal measurements of water quality probe parameters taken in the field within the canal and river system of St. Mary's, OH for the years 2023-2025.

HABS-BLOCKS© infused with glucose have been shown to reduce cyanobacterial populations and microcystin (MC) concentrations in laboratory mesocosm studies. An in situ limno-corral (LC) mesocosm study of HABS-BLOCKS© was conducted for two weeks during the 2025 algal bloom...

In Lake Erie, harmful algal blooms have become a recurrent problem during the summer-through-fall growing season. We investigated if the annual disturbance of harmful algal blooms in Lake Erie relates to distinct differences in carbon and nitrogen stable isotope composition (&del...

The U.S. Environmental Protection Agency’s National Nutrient Inventory provides estimates of major agricultural, urban, atmospheric, and natural nutrient fluxes for the contiguous United States at county and HUC12 scales annually from 1987 (from 1950 for agriculture) to 201...

Compared to the contiguous United States (CONUS), little is currently known about the potential vulnerability of public water systems (PWS) in the State of Alaska to freshwater harmful algal blooms (HABs). A Regional-Office of Research and Development (ORD) Applied Research (ROAR...

Quantitative Polymerase Chain Reaction (qPCR) is a well-established method for molecular detection and quantification of microorganisms. Molecular detection of toxigenic cyanobacteria using qPCR has also been employed as a useful tool for predicting cyanotoxin production and form...

Eutrophication of the northern Gulf of America (NGOA) (also known as northern Gulf of Mexico) due to excess nutrients has resulted in harmful algal blooms, the development of hypoxic zones, and negative impacts on seafood production, recreational activities, and marine transporta...