北部湾夏季浮游植物叶绿素a含量的分布特征

Abstract

2006年7月至8月现场调查了北部湾海域浮游植物叶绿素A含量的分布特征。结果表明:表层叶绿素A浓度范围0.14~7.89 Mg/M3,平均1.13 Mg/M3,并呈现自东向西、由近岸向湾中部逐渐递减的规律。水柱平均叶绿素A浓度达1.33 Mg/M3。近岸区叶绿素A浓度垂直分布比较均匀,受温跃层的影响,深水区叶绿素A浓度在各层次存在明显差别。

The distribution characteristics of chlorophyll a in the Beibu Gulf were investigated from July to August,2006.Results showed that the surface chlorophyll a concentration of the surveyed area ranged from 0.14 mg /m3to7.89 mg /m3,averaged as 1.13 mg/m3.The abundance of chlorophyll a decreased gradually from east to west and from the nearshore water area to the centre of the Gulf.The column average chlorophyll a concentration was about 1.33 mg /m3.As a result of the thermocline,the chlorophyll a concentration of offshore water zone displayed a remarkable vertical variation,differed from the nearshore water zone.