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Cyanobacterial Toxicity in Upper San Francisco Bay

Discolored water during the Microcystis bloom. (Photo: CA DWR)

Discolored water during the Microcystis bloom. (Credit: CA DWR)

The Harmful Algal Bloom Event Response Program supported an assessment of toxicity related to a bloom of the cyanobacteria Microcystis aeruginosa in upper San Francisco Bay. Event Response assisted California Department of Water Resources by identifying laboratory and analytical services for investigating bloom toxicity and by supplying funds for toxin analysis. The results were used to inform the public, stakeholders, and government resource managers and to guide future management action. This initial assessment of bloom toxicity has prompted further resources in the state to monitor the potential long-term impact of the bloom on human health and ecosystem function. For more about this event, see the Lehman et al. 2005 publication in Hydrobiologia: Distribution and toxicity of a new colonial Microcystis aeruginosa bloom in the San Francisco Bay, California.

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