Recovery of Microcystis surface scum following a mixing event: Insights from a tank experiment.

摘要: Abstract Cyanobacteria of the genus Microcystis produces surface scum that negatively affects water quality in inland waters. This layer can be disintegrated and vertically dispersed by external forces (e.g., wind mixing), followed reformation as buoyant colonies migrate upward. However, recovery dynamics following a strong mixing event have rarely been studied. Here, we used tank experiment to investigate process after with focus on different size classes their contribution process. colony distribution volume concentration was measured using laser in-situ scattering transmissometry instrument. The column upward migration velocity were strongly dependent size. Larger (>180 μm) fast rates contributed most formation shortly turbulence subsided. slowly migrating smaller observed over notably longer time. estimated floating velocities large ranged 0.15 0.46 m h−1 depending 5–15 times higher than those (~0.03 m h−1). changes reflect scum. Analysis for better understanding prediction development bodies.