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Study of the Characteristics and the Causes of Formation on the Red Tides in Coastal Guangdong Sea

QIAN Hong\|lin\+1, LIANG Song\+1, QI Yu\|zao\+2 (1.South China Sea Branch, State Oceanic China, Guangzhou 510300; 2.Institute of Hydrobiology, Jinan University)  
This paper enumerated the 66 events of red tide causing in coastal sea Guangdong, and conduct study and analysis on them. Concluding the results showed the following characteristics: the frequency causing red tide was heightening, the red tide could cause for any time in the whole year, the area causing was expanding, the holding time was longer, the degree causing disserve was greater, there were new species recorded and more red tides are noxious, etc. Through studying on the causing of the red tides, it considered that there was following four causes: ① There were more and more species causing red tides in coastal Guangdong sea, it was the important result causing red tide;\{② The\} marine polluting and the polluting from the marine breed aquatics were the basic consideration of the red tide causing continually;③ The causing of red tide related closely in the change of the season, the red tides mostly happen during March and May in coastal Guangdong sea, it was the change from northeast monsoon to southwest monsoon;④ It was resulted in the global climate. In addition, it advanced four countermeasures for preventing the disservice and decreasing economical losing causing the red tides in coastal Guangdong sea.
【Fund】: 国家自然科学基金重大项目资助项目!( 39790 110 )
【CateGory Index】: X55
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