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Evaluation of a Peroxide-Based Algaecide for Cyanobacteria Control: A Mesocosm Trial in Lake Okeechobee, FL, USA

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Environmental Laboratory, US Army Engineer Research and Development Center, 3909 Halls Ferry Rd, Vicksburg, MS 39180, USA
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SePRO Research and Technology Campus, 16013 Watson Seed Farm Rd, Whitakers, NC 27891, USA
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Oak Ridge Institute for Science and Education, Oak Ridge Associated Universities, 3909 Halls Ferry Rd, Vicksburg, MS 39180, USA
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Center for Aquatic and Invasive Plants, University of Florida, Gainesville, FL 32653, USA
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Fort Lauderdale Research and Education Center, University of Florida—IFAS, 3205 College Avenue, Davie, FL 33314, USA
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Credere Associates, LLC, 776 Main St., Westbrook, ME 04092, USA
*
Author to whom correspondence should be addressed.
Present address: National Oceanic and Atmospheric Administration, National Centers for Coastal Ocean Science, 101 Pivers Island Rd, Beaufort, NC 28516, USA.
Present address: Illumina, Inc., 5200 Illumina Way, San Diego, CA 92122, USA.
Academic Editor: Carmen Teodosiu
Water 2022, 14(2), 169; https://doi.org/10.3390/w14020169
Received: 3 December 2021 / Revised: 26 December 2021 / Accepted: 29 December 2021 / Published: 8 January 2022
(This article belongs to the Section Water Resources Management, Policy and Governance)
A 72 h small-scale trial was conducted in enclosed mesocosms in the Lake Okeechobee waterway to evaluate the effectiveness of a USEPA-registered peroxide-based algaecide (formulated as sodium carbonate peroxyhydrate) for controlling a natural cyanobacteria population. Mesocosms were initially subjected to either no algaecide or the maximum label rate of 10 mg H2O2·L−1. A subset of mesocosms were then subjected to a sequential application of 5 mg H2O2·L−1 at 48 h after initial treatment. Following application, peroxide concentrations rapidly decreased and were undetectable by 48 h. At 24 h after treatment, significant decreases in all biomass indicators were observed (compared to untreated mesocosms), including extracted chlorophyll a, microscopic counts (total phytoplankton and total cyanobacteria), and cyanobacteria-specific 16S rRNA gene copies by over 71%. Although peroxide treatment reduced cyanobacteria biomass, there was no change in overall community structure and the remaining population was still dominated by cyanobacteria (>90%). After 48 h exposure, some biomass recovered in single application mesocosms resulting in only a 32–45% reduction in biomass. Repeated peroxide dosing resulted in the greatest efficacy, which had a sustained (60–91%) decrease in all biomass indicators for the entire study. While a single application of the peroxide was effective in the first 24 h, a sequential treatment is likely necessary to sustain efficacy when using this approach to manage cyanobacteria in the field. Results of this study support that this peroxide-based algaecide is a strong candidate to continue with scalable field trials to assess its potential future utility for operational management programs in the Lake Okeechobee waterway. View Full-Text
Keywords: cyanobacteria; peroxide-based algaecide; harmful algal bloom management cyanobacteria; peroxide-based algaecide; harmful algal bloom management
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MDPI and ACS Style

Pokrzywinski, K.L.; Bishop, W.M.; Grasso, C.R.; Fernando, B.M.; Sperry, B.P.; Berthold, D.E.; Laughinghouse, H.D., IV; Van Goethem, E.M.; Volk, K.; Heilman, M.; Getsinger, K.D. Evaluation of a Peroxide-Based Algaecide for Cyanobacteria Control: A Mesocosm Trial in Lake Okeechobee, FL, USA. Water 2022, 14, 169. https://doi.org/10.3390/w14020169

AMA Style

Pokrzywinski KL, Bishop WM, Grasso CR, Fernando BM, Sperry BP, Berthold DE, Laughinghouse HD IV, Van Goethem EM, Volk K, Heilman M, Getsinger KD. Evaluation of a Peroxide-Based Algaecide for Cyanobacteria Control: A Mesocosm Trial in Lake Okeechobee, FL, USA. Water. 2022; 14(2):169. https://doi.org/10.3390/w14020169

Chicago/Turabian Style

Pokrzywinski, Kaytee L., West M. Bishop, Christopher R. Grasso, Brianna M. Fernando, Benjamen P. Sperry, David E. Berthold, Haywood D. Laughinghouse IV, Erika M. Van Goethem, Kaitlin Volk, Mark Heilman, and Kurt D. Getsinger. 2022. "Evaluation of a Peroxide-Based Algaecide for Cyanobacteria Control: A Mesocosm Trial in Lake Okeechobee, FL, USA" Water 14, no. 2: 169. https://doi.org/10.3390/w14020169

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