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EPA and regional teams test methods for assessing benthic cyanobacteria and toxin risk
Summary
A multi‑region EPA research effort tested transect methods, disturbance sampling and standardized mat processing; investigators reported that visual cover measured by a bathyoscope correlated with toxins and toxic‑gene signals and that a simplified 3‑category visual protocol improved field consistency.
Chris Neach of the U.S. Environmental Protection Agency’s Office of Research and Development summarized a multi‑region study that evaluated field and laboratory methods for benthic cyanobacteria monitoring.
The EPA presentation described work during 2023–24 at river and stream sites across multiple states. Teams tested a transect‑based visual cover assessment, composited mat sampling with a 2‑inch delimiter, spats (passive samplers), and a range of laboratory analyses including ELISA toxin assays and…
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