Annual Cycle of Potentially Harmful Dinoflagellates in the Golfo de Nicoya, Costa Rica
Phytoplankton blooms caused by dinoflagellates are a common feature of the Gulf of Nicoya. Previous work documented the occurrence of Cochlodinium catenatum as the causative organism. A 1-year monitoring of the dinoflagellates was carried out in the middle and upper Gulf to determine whether other dinoflagellates were implicated in these blooms, and were more frequent during the rainy season. Two non-toxic organisms, the ciliate Mesodinium rubrum and the dinoflagellate Prorocentrum balticum along with the potentially toxic Gymnodinium catenatum were found. Alexandrium monilatum was a frequent component of red tides although in low concentrations. The implications of the appearance of potentially toxic species are discussed.
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Document Type: Research Article
Publication date: 1995-09-01
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