Keith A. Loftin

Target-chemical concentrations and microbiological results in tapwater, New York, 2022-23

Kristin M. Romanok, Paul M. Bradley, Kelly L. Smalling, James L. Gray et autres

This data release contains the concentration and quality-assurance results for inorganic constituents, as well as organic compounds (volatile organic compounds [VOC], per- and polyfluoroalkyl substances [PFAS], pesticides, and disinfection byproducts [DBP]), radionuclides, cyanotoxins and microbiological results analyzed in water-quality samples from 19 …

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Diel phytoplankton, qPCR, and cyanotoxin data for Kabetogama Lake at Voyageurs National Park, 2024

Hailey E Trompeter, Sarah E. Janssen, Keith A. Loftin, James H. Larson et autres

This data release provides phytoplankton environmental DNA (eDNA), cyanotoxin biosynthesis gene abundance, phytoplankton microscopy, and cyanotoxin data collected from Ellsworth Rock Gardens in Kabetogama Lake at Voyageurs National Park (USGS site ID: USGS-482947092584401). These samples were collected three times, about every 12 …

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Phytoplankton growth and potential cyanotoxin production differ in response to nitrogen and phosphorus amendments in late summer communities from Kabetogama Lake (Minnesota, United States)

James H. Larson, Ryan P. Maki, Sean W. Bailey, Victoria G. Christensen et autres

Abstract Cyanotoxins such as microcystin (MC), cylindrospermopsin, and saxitoxin are secondary metabolites that are rich in nitrogen (N). Most cyanobacteria grow best on reduced inorganic N (ammonium, NH 4 ), but when NH 4 is absent, cyanobacteria can activate physiological pathways to …

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Cyanobacterial bloom occurrence and emergency department visits for asthma or wheeze, Wisconsin, 2017–2019

Amy M. Lavery, Jordan M. Murray, Audrey Flak Pennington, Blake A. Schaeffer et autres

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, and Oshkosh) during 2017–2019. CyanoHAB exposure was …

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Target chemical concentrations of mixed-organic compounds and microbiological indicators in tapwater, Montana, 2024

Kristin Romanok, Molly L. Schreiner, Paul M Bradley, Kelly L. Smalling et autres

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Qualitative Analysis of Cyanotoxins in Lake Erie Samples Using Liquid Chromatography/High Resolution Mass Spectrometry (LC/HRMS) from July 2016 to October 2022

Ashley E Lopez, Zachary R. Laughrey, Keith A. Loftin, Olivia J. Jenks et autres

Toxic harmful algal blooms are caused by cyanobacteria and can pose a threat to freshwater ecosystems, including the western basin of Lake Erie. Bloom toxicity can be influenced by variation of biosynthetic repertoires of toxic cyanobacteria but is not well studied beyond …

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Per- and polyfluoroalkyl substances (PFAS) and other contaminants of concern in tribal waters of Montana

Kelly L. Smalling, Paul M. Bradley, Kristin M. Romanok, John T. Doyle et autres

were detected. Despite relatively low concentrations in surface waters within the Crow Reservation, mixture toxicity indicated prevalent chronic ecological effects and human-health secondary contact (recreation) effects at multiple sites. Further, to address Tribal concerns over the prevalence and corresponding risks of per- …

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Diverse Cyanopeptides follow distinct temporal succession patterns in freshwater harmful algal blooms

Lauren N. Hart, Reagan M. Errera, Casey M. Godwin, Keith A. Loftin et autres

Toxic cyanobacterial harmful algal blooms (cyanoHABs) threaten freshwater resources globally and are intensifying with increasing eutrophication. Bloom toxicity is strongly influenced by intraspecific variation in the biosynthetic repertoires of toxic cyanobacteria, yet few studies examine the diversity of cyanobacterial cyanopeptides beyond hepatotoxic …

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Phytoplankton responses to experimental nitrogen and phosphorus loading in the eutrophic and colored Caloosahatchee River, Florida

Viviana Mazzei, Keith A. Loftin, Emily E. Karwacki, Jose Victor Lopez et autres

Field sampling guidelines for developing and verifying satellite remote sensing chlorophyll a concentration and fluorescence models in inland waters

Schuyler C. Nardelli, Dulcinea Avouris, Tyler V. King, Keith A. Loftin et autres

Cyanotoxin and domoic acid occurrence, relation with salinity, and potential recreational health risks in U.S. coasts in the 2015 US EPA National Coastal Condition Assessment

Ariel R. Donovan, Zachary R. Laughrey, Robin A. Femmer, Sarena Senegal et autres

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Comparison of Microcystin-LR Degradation by UV222 and UV254

Zanna J. Leciejewski, Zachary R. Laughrey, Amanda L. Stickney, Keith A. Loftin et autres

Microcystin-LR (MC-LR), a toxin produced during some cyanobacterial harmful algal blooms (cyanoHABs), can harm ecosystems and require consideration in water treatment. Ultraviolet (UV)-C treatment has the potential to degrade cyanotoxins with less harmful byproducts than other treatments. This study compares MC-LR degradation …

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