Data in Action: Coastal Upwelling and Harmful Algal Blooms in Southern California

In late September 2011, local reports indicated the presence of intense algal blooms along the Southern California coastline. This was followed in early October by an unusual congregation of blue whales feeding near Los Angeles, including shipping lanes where the whales could be at severe risk. The continued presence of these whales indicated a readily available and concentrated food source of krill, small shrimp-like crustaceans.

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