Spreading of the toxic dinoflagellate Gymnodinium catenatum in the western Mediterranean Sea
There have been two Raphidophyceae blooms, as well as a number of other blooms recorded in Dapeng Bay in the early part of this year. A Heterosigma akashiwo bloom occurred in the inner bayments of Dapeng Bay. In April 2001, a mixed bloom of Chattonella ovata and Chattonella globosa was recorded in the same area. The first Raphidophyceae bloom, Heterosigma sp., was recorded in South China waters in the late 1980s. No other Raphidophyceae bloom was recorded until 1993, when a Chattonella marina bloom occurred in Dapeng Bay. Since then, more and more Raphidophyceae species, e.g. Chattonella antiqua, C. globosa, and C. ovata have been found in these waters. South China waters are one of the locations with the most frequent HAB occurrences in the world. In recent years, more and more new harmful species have been recorded in these waters.