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赤潮是指一些浮游生物在一定环境条件下暴发性繁殖引起海水变色的现象,它也是一种海洋污染现象。人们很早就发现赤潮现象,在中国古书和西方圣经《旧约·出埃及记》都有记载。732年,日本记录了相模湾和伊豆内海发生的赤潮现象。1831-1836年 C.R.达尔文在“贝格尔”号航海记录中记述了巴西、智利海面由蓝藻门束毛藻引起的赤潮。20世纪以来,赤潮发生的次数逐年增多,如日本濑户内海在1955年以前的几十年期间,赤潮只出现5次,1955～1976年竟多达326次。中国浙江镇海、定海和台州一带海域在1933年曾发生过夜光藻
Red tide refers to the phenomenon of some marine plankton blooming under certain environmental conditions caused by sea water discoloration, it is also a phenomenon of marine pollution. Red tides have long been discovered in ancient China and in the Old Testament and Exodus in the Bible. In 732, Japan recorded the red tide occurring in Sagami Bay and the Izu Inland Sea. 1831-1836 C.R. Darwin described the red tide caused by the cyanobacteria algae in the sea of Chile, Brazil, in Beagle’s sailing record. Since the 20th century, the number of red tides has been increasing year by year. For example, in the decades before 1955 in Japan’s Seto Inland Sea, there were only 5 red tides and as many as 326 in 1955-1976. Zhenhai, Zhejiang, China, Dinghai and Taizhou waters in the night occurred in 1933 Chlamydomonas