12th International Conference on Harmful Algae

INTERNATIONAL SOCIETY FOR THE STUDY OF HARMFUL ALGAE12 th <strong>International</strong> <strong>Conference</strong> on Harmful Algae, Copenhagen, Denmark, 4-8 September 2006potential biocontrol agent for thecontrol of harmful algal bloomsPO.13-43National report of red tides(HABs) in China 2001- 2005Session: PO.13 - Regional eventsHao Guo 1 , Xiao Lei Yi 21 National Marine Environmental Monitoring,DALIAN, Liaoning Province, China2 State Oceanic Administration (SOA),BEIJING, ChinaRed tides (HABs) is an importantenvironmental issue in Chinesecoastal areas. From the first recordof a red tide in 1933, more than 800red tide events have been recordedin China. In 2001-2005, Chinawitnessed 453 cases of red tides,which covered an area of 93.26thousand square kilometres totally.Most red tides are located in theEast China Sea. Results ofmonitoring indicate that red tidesfrequently occur in May/June. 62%of the red tides occurred during thisperiod, representing 83% of thearea. Dominant red tide organismswere Prorocentrum dentatum,Skeletonema costatum, Noctilucascintillans, Mesodinium rubrum etc.Poisonous and harmful species likeKarenia mikimotoi, Phaeocystis sp.etc. have increased in recent years.Land-based pollution andeutrophication is suggested to bethe main reason causing red tides.Careful monitoring increases thediscovery and control of red tidessignificantly, and emergencyresponse systems play an importantrole for mitigating the impact of thered tides.PO.01-21Occurrence of motile cells of aGymnodinium species, belongingto the Gymnodinium catenatumgroup, in the western Baltic SeaSession: PO.01 - GeneticsJ Göbel 1 , D Lu 21 Landesamt für Natur und Umwelt,FLINTBEK, Germany2 Second Institute of Oceanography,HANGZHOU, ChinaSince 2003 motile cells of theGymnodinium have been detectedin the coastal waters of Schleswig-Holstein within the context of theintensive phytoplankton monitoring(Early Algae Detection System)during the summer months. Thespecies usually appears asvegetative single cells but also 2-cell-chains were observed in thesamples. Data show that thisGymnodinium did not appear before2003 and until now there has beenno records of motile vegetative cellsfrom the water column of otherareas in the Baltic Sea.The reason may be its low cellnumbers but it may also indicaterecent changes of environmentalconditions, which probably promotethe germination of cysts fromsediments.PO.15-31Field plankton observation:equipment and techniquesSession: PO.15 - MonitoringS Hall, SM Conrad, SM Etheridge, JRDeedsFDA, LAUREL, MD, United States ofAmericaA small, hand-held field microscopepermits plankton observations innear real time- a few minutes fromnet tow to observation. This in turnpermits sampling to be directed bywhat one sees, rather than having183