Keith A Loftin, Ph.D.
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Spatial variability of harmful algal blooms in Milford Lake, Kansas, July and August 2015 Spatial variability of harmful algal blooms in Milford Lake, Kansas, July and August 2015
Cyanobacterial harmful algal blooms (CyanoHABs) tend to be spatially variable vertically in the water column and horizontally across the lake surface because of in-lake and weather-driven processes and can vary by orders of magnitude in concentration across relatively short distances (meters or less). Extreme spatial variability in cyanobacteria and associated compounds poses unique...
Authors
Guy M. Foster, Jennifer L. Graham, Tom C. Stiles, Marvin G. Boyer, Lindsey R. King, Keith A. Loftin
Estimating microcystin levels at recreational sites in western Lake Erie and Ohio Estimating microcystin levels at recreational sites in western Lake Erie and Ohio
Cyanobacterial harmful algal blooms (cyanoHABs) and associated toxins, such as microcystin, are a major global water-quality issue. Water-resource managers need tools to quickly predict when and where toxin-producing cyanoHABs will occur. This could be done by using site-specific models that estimate the potential for elevated toxin concentrations that cause public health concerns. With...
Authors
Donna S. Francy, Amie M.G. Brady, Christopher D. Ecker, Jennifer L. Graham, Erin A. Stelzer, Pamela Struffolino, Keith A. Loftin
Cyanotoxins in inland lakes of the United States: Occurrence and potential recreational health risks in the EPA National Lakes Assessment 2007 Cyanotoxins in inland lakes of the United States: Occurrence and potential recreational health risks in the EPA National Lakes Assessment 2007
A large nation-wide survey of cyanotoxins (1161 lakes) in the United States (U.S.) was conducted during the EPA National Lakes Assessment 2007. Cyanotoxin data were compared with cyanobacteria abundance- and chlorophyll-based World Health Organization (WHO) thresholds and mouse toxicity data to evaluate potential recreational risks. Cylindrospermopsins, microcystins, and saxitoxins were...
Authors
Keith A. Loftin, Jennifer L. Graham, Elizabeth Hilborn, Sarah Lehmann, Michael T. Meyer, Julie E. Dietze, Christopher Griffith
Total cylindrospermopsins, microcystins/nodularins, and saxitoxins data for the 2007 United States Environmental Protection Agency National Lake Assessment Total cylindrospermopsins, microcystins/nodularins, and saxitoxins data for the 2007 United States Environmental Protection Agency National Lake Assessment
Phytoplankton communities in freshwater lakes, ponds, and reservoirs may be dominated by cyanobacteria (also called blue-green algae) under certain environmental conditions. Cyanobacteria may cause a range of water-quality impairments, including the potential for toxin production. Cyanobacteria toxins (cyanotoxins) may adversely impact human and ecological health. Microcystins are...
Authors
Keith A. Loftin, Julie E. Dietze, Michael T. Meyer, Jennifer L. Graham, Megan M. Maksimowicz, Kathryn D. Toyne
Challenges for mapping cyanotoxin patterns from remote sensing of cyanobacteria Challenges for mapping cyanotoxin patterns from remote sensing of cyanobacteria
Using satellite imagery to quantify the spatial patterns of cyanobacterial toxins has several challenges. These challenges include the need for surrogate pigments – since cyanotoxins cannot be directly detected by remote sensing, the variability in the relationship between the pigments and cyanotoxins – especially microcystins (MC), and the lack of standardization of the various...
Authors
Rick P Stumpf, Timothy W. Davis, Timothy T. Wynne, Jennifer L. Graham, Keith A. Loftin, T.H. Johengen, D. Gossiaux, D. Palladino, A. Burtner
Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern USA Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern USA
Despite historical observations of potential microcystin-producing cyanobacteria (including Leptolyngbya,Phormidium, Pseudoanabaena, and Anabaena species) in 74% of headwater streams in Alabama, Georgia, South Carolina, and North Carolina (USA) from 1993 to 2011, fluvial cyanotoxin occurrence has not been systematically assessed in the southeastern United States. To begin to address this...
Authors
Keith A. Loftin, Jimmy M. Clark, Celeste A. Journey, Dana W. Kolpin, Peter C. Van Metre, Paul M. Bradley
Science and Products
Filter Total Items: 32
Filter Total Items: 28
No Result Found
Filter Total Items: 87
Spatial variability of harmful algal blooms in Milford Lake, Kansas, July and August 2015 Spatial variability of harmful algal blooms in Milford Lake, Kansas, July and August 2015
Cyanobacterial harmful algal blooms (CyanoHABs) tend to be spatially variable vertically in the water column and horizontally across the lake surface because of in-lake and weather-driven processes and can vary by orders of magnitude in concentration across relatively short distances (meters or less). Extreme spatial variability in cyanobacteria and associated compounds poses unique...
Authors
Guy M. Foster, Jennifer L. Graham, Tom C. Stiles, Marvin G. Boyer, Lindsey R. King, Keith A. Loftin
Estimating microcystin levels at recreational sites in western Lake Erie and Ohio Estimating microcystin levels at recreational sites in western Lake Erie and Ohio
Cyanobacterial harmful algal blooms (cyanoHABs) and associated toxins, such as microcystin, are a major global water-quality issue. Water-resource managers need tools to quickly predict when and where toxin-producing cyanoHABs will occur. This could be done by using site-specific models that estimate the potential for elevated toxin concentrations that cause public health concerns. With...
Authors
Donna S. Francy, Amie M.G. Brady, Christopher D. Ecker, Jennifer L. Graham, Erin A. Stelzer, Pamela Struffolino, Keith A. Loftin
Cyanotoxins in inland lakes of the United States: Occurrence and potential recreational health risks in the EPA National Lakes Assessment 2007 Cyanotoxins in inland lakes of the United States: Occurrence and potential recreational health risks in the EPA National Lakes Assessment 2007
A large nation-wide survey of cyanotoxins (1161 lakes) in the United States (U.S.) was conducted during the EPA National Lakes Assessment 2007. Cyanotoxin data were compared with cyanobacteria abundance- and chlorophyll-based World Health Organization (WHO) thresholds and mouse toxicity data to evaluate potential recreational risks. Cylindrospermopsins, microcystins, and saxitoxins were...
Authors
Keith A. Loftin, Jennifer L. Graham, Elizabeth Hilborn, Sarah Lehmann, Michael T. Meyer, Julie E. Dietze, Christopher Griffith
Total cylindrospermopsins, microcystins/nodularins, and saxitoxins data for the 2007 United States Environmental Protection Agency National Lake Assessment Total cylindrospermopsins, microcystins/nodularins, and saxitoxins data for the 2007 United States Environmental Protection Agency National Lake Assessment
Phytoplankton communities in freshwater lakes, ponds, and reservoirs may be dominated by cyanobacteria (also called blue-green algae) under certain environmental conditions. Cyanobacteria may cause a range of water-quality impairments, including the potential for toxin production. Cyanobacteria toxins (cyanotoxins) may adversely impact human and ecological health. Microcystins are...
Authors
Keith A. Loftin, Julie E. Dietze, Michael T. Meyer, Jennifer L. Graham, Megan M. Maksimowicz, Kathryn D. Toyne
Challenges for mapping cyanotoxin patterns from remote sensing of cyanobacteria Challenges for mapping cyanotoxin patterns from remote sensing of cyanobacteria
Using satellite imagery to quantify the spatial patterns of cyanobacterial toxins has several challenges. These challenges include the need for surrogate pigments – since cyanotoxins cannot be directly detected by remote sensing, the variability in the relationship between the pigments and cyanotoxins – especially microcystins (MC), and the lack of standardization of the various...
Authors
Rick P Stumpf, Timothy W. Davis, Timothy T. Wynne, Jennifer L. Graham, Keith A. Loftin, T.H. Johengen, D. Gossiaux, D. Palladino, A. Burtner
Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern USA Spatial and temporal variation in microcystins occurrence in wadeable streams in the southeastern USA
Despite historical observations of potential microcystin-producing cyanobacteria (including Leptolyngbya,Phormidium, Pseudoanabaena, and Anabaena species) in 74% of headwater streams in Alabama, Georgia, South Carolina, and North Carolina (USA) from 1993 to 2011, fluvial cyanotoxin occurrence has not been systematically assessed in the southeastern United States. To begin to address this...
Authors
Keith A. Loftin, Jimmy M. Clark, Celeste A. Journey, Dana W. Kolpin, Peter C. Van Metre, Paul M. Bradley