【摘要】 2004年4～5月对东海赤潮高发区开展了赤潮原因种的大面观测并对期间爆发的特大赤潮进行跟踪调查,在56个站位采集了171份样品。表层东海原甲藻(Prorocentrumdonghaiense)变化范围为2.5×103～6.0×107cells·L-1,最大值出现在122.94°E,30°N的rb12A站;中层东海原甲藻变化范围为1.0×103～5.32×106cells·L-1,最大值出现在rf40站。从水平分布看,东海原甲藻呈不均匀分布,从垂直分布看,赤潮爆发前原甲藻细胞在水体中层密集,大量增殖后上升到表层,爆发赤潮。更多还原

【Abstract】 171 water samples were collected from 56 stations in typical regions where Harmful Alage blooms frequently occurred in East China Sea during April to May,2004. Prorocentrum donghaiense cell density ranged from 2.5×103 to 6.0×107cells·L-1 at surface water layer, with an average of 4.87×106cells·L-1.At station rb12A located at 122.94°E and 30°N,The highest Prorocentrum donghaiense cell density was observed. Prorocentrum donghaiense cell density ranged from 1.0×103 to 5.32×106cells·L-1 at middle water layer, with average of 6.17×105cells·L-1.At station rf40 located at 122.53°E and 29.3335°N,the highest Prorocentrum donghaiense cell density was found. Horizontally, Prorocentrum donghaiense showed scattered distribution, while vertically,Prorocentrum donghaiense assembled on middle water layer before the outbreak of HABs, and upwells to surface layer after the high increased of cell density, caused the outbreak of HABs.更多还原