TECHNICAL BRIEFING Cell Enumeration of Colonial and Filamentous Cyanobacteria with FlowCam: Method & Case Study TRACK HAB GROWTH Accurately determining cell counts of colonial and filamentous cyanobacteria such as Microcystis and Anabaena is critical for monitoring potentially toxic cyanobacteria. Traditional methods, including manual microscopy, are time consuming, tedious, prone to error and difficult to verify. In the March 2017 issue of Harmful Algae, scientists from the California Department of Water Resources describe how they estimated cell abundance of colonial Microcystis using a FlowCam ® . This Technical Briefing explains their methodology and also applies it to filamentous cyanobacteria. Figure 1. Colonial algae (Microcystis) and filamentous algae (Anabaena) can be

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