Widespread anatoxin-a detection in benthic cyanobacterial mats throughout a river network

PloS One
Keith Bouma-GregsonMary E Power

Abstract

Benthic algae fuel summer food webs in many sunlit rivers, and are hotspots for primary and secondary production and biogeochemical cycling. Concerningly, riverine benthic algal assemblages can become dominated by toxic cyanobacteria, threatening water quality and public health. In the Eel River in Northern California, over a dozen dog deaths have been attributed to cyanotoxin poisonings since 2000. During the summers of 2013-2015, we documented spatial and temporal patterns of cyanotoxin concentrations in the watershed, showing widespread distribution of anatoxin-a in benthic cyanobacterial mats. Solid phase adsorption toxin tracking (SPATT) samplers were deployed weekly to record dissolved microcystin and anatoxin-a levels at 10 sites throughout the watershed, and 187 Anabaena-dominated or Phormidium-dominated cyanobacterial mat samples were collected from 27 locations to measure intracellular anatoxin-a (ATX) and microcystins (MCY). Anatoxin-a levels were higher than microcystin for both SPATT (mean MCY = 0.8 and ATX = 4.8 ng g resin-1 day-1) and cyanobacterial mat samples (mean MCY = 0.074 and ATX = 1.89 μg g-1 DW). Of the benthic mats sampled, 58.9% had detectable anatoxin-a (max = 70.93 μg g-1 DW), while 37.6% had detecta...Continue Reading

References

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Citations

Aug 12, 2020·Expert Opinion on Biological Therapy·A BakakosP Bakakos
Mar 3, 2020·Frontiers in Microbiology·Georgia Thomson-LaingSusanna A Wood
Sep 17, 2019·Water Environment Research : a Research Publication of the Water Environment Federation·Paula C FureySylvia Lee
Dec 9, 2020·Journal of Applied Toxicology : JAT·Bahareh Nowruzi, Samaneh Jafari Porzani
Jan 12, 2021·Toxicon : Official Journal of the International Society on Toxinology·Meredith D A HowardZachary Laughrey
May 30, 2021·Proceedings of the National Academy of Sciences of the United States of America·Mary E Power

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Software Mentioned

R
lme4
SPATT

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