Hydrogen peroxide in eutrophic Lake Taihu, China: Addition effects on phytoplankton and diel variability in natural concentrations Public Deposited

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  • March 20, 2019
Creator
  • Pflaumer, Amy
    • Affiliation: College of Arts and Sciences, Department of Marine Sciences
Abstract
  • Hydrogen peroxide (HOOH) has demonstrated potential for algicidal use due to selective suppression of cyanobacteria relative to other phytoplankton. Bioassays were used to assess the effects of HOOH on Lake Taihu phytoplankton community and toxin concentrations. The relative contribution of cyanobacteria to phytoplankton biomass was reduced by >50% at 40-60 µM HOOH. Toxin concentrations did not increase above untreated controls at doses >20 µM. Although algicidal use of HOOH is not feasible in large lakes (e.g. Taihu), these results provide further evidence for selective suppression, possibly in smaller lakes. In addition to selective effects, HOOH is an ideal algicide because it is produced abiotically and biotically in lakes and decays into water and oxygen. During a diel study in Taihu, surface HOOH concentrations ranged from 17 ± 6 nM to 168 ± 8 nM and demonstrated diel cycling. Concentrations may be relatively low due to heightened biological decay during blooms.
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  • In Copyright
Advisor
  • Paerl, Hans W.
  • Alperin, Marc
  • Marchetti, Adrian
Degree
  • Master of Science
Degree granting institution
  • University of North Carolina at Chapel Hill Graduate School
Graduation year
  • 2016
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