Characteristics analysis of red tide events in Qinhuangdao sea area from 1990 to 2023 and countermeasures
This research summarized the characteristics of red tide in Qinhuangdao sea area in re-cent 30 years,analyzed the causes and proposed countermeasures and suggestions.From 1990 to 2023,79 red tide events were recorded in Qinhuangdao sea area.The occurrence time of red tide was concentrated in may to August,and the most occured in June.A total of 33 species of red tide organisms were involved,and the organisms that caused red tide more frequently were noctiluca scintillans,scrippsiella trochoidea,aureococcus anophagefferens,mesodinium rubrum,prorocentrum minimum.The frequency and proportion of toxic red tide increased gradually.The hotspots of red tide occurred in the areas with abundant nutrients or poor water exchange capacity,such as estuar-ies,bathing beachs,and Qinhuangdao Port.The countermeasures of red tide prevention and control include strictly control the inflow of land-based pollutants,strengthen pollution prevention and con-trol of port and dock,vigorously promote the construction of red tide monitoring and early warning capacity.
Qinhuangdao sea areared tide timetoxic red tidehotspotscause of red tide
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