Science Inventory

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Dissolved reactive phosphorus (DRP) export from agricultural areas is a leading cause of nutrient pollution in freshwater systems (e.g., the North American Great Lakes). A potential solution to mitigate the excessive release of DRP is the use of nutrient management. To evaluate t...

Reduced tillage management conservation practices (No-till and Reduced-till) are widely adopted in agriculture; however, understanding their overall effectiveness for water quality protection is challenging. A meta-analysis was conducted to understand and quantify the effectivene...

Lake Erie is threatened by eutrophication and harmful algal blooms due to excess nutrient loading from agricultural sources. To reduce nutrient loading to Lake Erie, widespread adoption of agricultural conservation practices (ACPs) has been proposed. However, identifying appropri...

General overview of the Cyanobacteria Assessment Network (www.epa.gov/cyanoproject) current technology, software, and data. A future look of using Sentinel-2 higher resolution imagery and forecasting will also be provided.

Cyanobacterial harmful algal blooms (CyanoHABs) produce excessive amounts of cyanotoxins, mainly microcystins (MCs) and anatoxins (ATXs), significantly threatening aquatic ecosystems and public health. Accurately predicting CyanoHABs is essential to develop effective CyanoHAB pre...

U.S. states, tribes, and local agencies need consistent approaches to characterize the relative risk posed by harmful benthic cyanobacteria proliferations and to inform mitigation practices. USEPA is addressing this need with multi-year, multi-site field research and controlled e...

This is a requested presentation for the Association of Clean Water Administrators (ACWA) that discusses how ORD is the research arm of the EPA and provides the scientific foundation for EPA to execute its mandate to protect human health and the environment. An overview of the 6 ...

Cyanobacteria blooms are an increasing concern in U.S. freshwaters. Such blooms can produce nuisance conditions, deplete oxygen, and alter the food chain, and in some cases they may produce potent toxins, although many factors may modulate the relationships between biomass and to...

Abstract for Harmful Algal Blooms Session at SOT 2024 Anatoxins are small, water-soluble molecules produced by cyanobacteria in fresh and marine waters globally. They are known to cause prolonged depolarization at the neuromuscular junctions leading to generalized paralysis and c...

CyAN is a multi-agency project to develop an early warning indicator system to detect algal blooms in U.S. freshwater systems. This research supports federal, state, tribal, and local partners in their monitoring efforts to assess water quality to protect aquatic and human health...

The purpose of the study on health effects and toxicity is to develop data, methods, and tools to advance the understanding of adverse health impacts among people, other animals and plants that are associated with exposure to harmful algal blooms (HABs) from both planktonic and b...

Nutrient export from agricultural areas has been an environmental concern. Nutrient management practices have been studied/implemented to reduce nutrient losses from agricultural fields. Nutrients are managed based on the 4Rs of nutrient stewardship: apply the right nutrient sour...

This presentation is to the Research Area Coordination Team (RACT) for the Safe and Sustainable Waters Research program. This work contributes to SSWR Subproduct 404.3.2 Applying forecasted data to better understand, quantify, and anticipate the social and environmental justice i...

This overview is designed for a general audience without expertise in satellite remote sensing and forecasting. It is meant to highlight how the Cyanobacteria Assessment Network, CyAN , might provide useful real-time data, software, training, annual summary metrics, and 1-week fo...

Data and analysis of water chemistry and lower food web for collaborative report. This dataset was an important part of the manuscript "A modeling study to determine the contribution of interbasin versus intrabasin phosphorus loads on the southwestern nearshore of Lake Ontar...

Anthropogenic pollution of hydrological systems affects diverse communities and ecosystems around the world. Data analytics and modeling tools play a key role in fighting this challenge, as they can help identify key sources as well as trace transport and quantify impact within c...

This presentation was developed to update the SSWR HABs RAC on the progress made on SSWR.404.2 (Management of HABs in the Built and Natural Environment) during FY23.

Benthic harmful cyanobacteria blooms (HCBs) pose a significant threat to domestic animals, wildlife, and humans. They are a growing concern especially in the west. State, tribal, and local agencies need greater understanding of the risk posed by benthic HCBs. While The Interstate...

Cyanobacterial harmful algal blooms (HABs) can produce toxins that impair freshwater ecosystems used for drinking water, recreation, and habitat for aquatic biota. With HABs increasing in extent and intensity globally, water managers need information about how to prioritize lake ...

The U.S. EPA Office of Research and Development, Regions 5, 7 and 8 and EPA Office of Water hosted a multi-regional harmful algal bloom (HABs) workshop on February 4 - 6, 2020 at the University of Kansas Edwards Campus in Overland Park, Kansas. The workshop brought together State...

This is a requested presentation from the Upper Mississippi River Basin Water Quality Task force on EPA ORD's nutrients and harmful algal bloom research in the Mississippi River Basin and Region 7. The presentation covers several research projects related to predicting harmful al...

Update on SSWR Nutrients and HABs research for Region 5 States meeting. This presentation covers research that addresses nutrient pollution and  HABs forecasting. Where possible, we have highlighted nutrient reduction related to nonpoint sources including agriculture and sep...

The objective of the study is to determine if available normal 3D human skin tissue culture system can be used to detect and quantify the effects of exposure to cyanobacteria in a water sample like what might be observed in skin rashes or irritations of swimmers exposed to lake w...

Exposure to cyanobacterial toxins have been linked to a host of diseases and disorders including skin rashes and damage to the liver and kidneys. Previous research has shown that Microcystin-LR (Mc-LR), the most common and toxic microcystin present in fresh water, induces the NLR...

M. aeruginosa fluorescent changes were observed using a Cytek Aurora spectral flow cytometer that contains 5 lasers and 64 narrow band detectors located between 365 and 829 nm. Cyanobacteria were treated with different concentrations of H2O2 and then monitored afte...