摘要
以南戴河近岸海域为研究对象,分析了该海域2009年5-10月份硅酸盐和叶绿素a的时空分布特征,并初步探讨了它们与微微型藻华的关系。结果表明：整个调查期间该海域硅酸盐平均含量为0.67±0.31 mg·L-1,叶绿素a平均含量为2.06±1.16 ug·L-1;其平面分布呈现近岸高、远岸低的特点;硅酸盐平均含量9月最高、5月最低;叶绿素a平均含量在8-9月高、5-6月低;微微藻赤潮期间海域硅酸盐和叶绿素a平均含量明显高于未发生微微藻赤潮的2008年同期。叶绿素a与硅酸盐浓度呈现出正相关关系,在微微藻赤潮爆发期间尤为显著,可能是因为微微型浮游植物大量生长抑制了硅藻等消耗硅酸盐藻类的正常生长繁殖所致。
The seasonal variation and spatial distribution of silicate and Chl. a during May to October in 2009 were analyzed by taking Nandaihe coastal waters as a case study,and the relationship between them and the picophytoplankton algal bloom was also discussed. Results showed that the average concentration was 0.67±0.31 mg·L-1for silicate,and 2.06±1.16 ug·L-1for Chl. a during the research. The spatial distribution of silicate and Chl. a both decreased from inshore to offshore area. The average concentration of silicate was the highest in September,and the lowest in May,while that of Chl. a was the highest during August to September,and the lowest during May to June. During the period of picophytoplankton algal bloom,the average concentrations of silicate and Chl. a were significantly higher than those in the same period of 2008 when the picophytoplankton algal bloom didn＇t occur. It showed positive correlations between distribution features of silicate and Chl. a,which was more obvious in the course of picophytoplankton algal bloom. It was analyzed that the mass propagation of picophytoplankton inhibited the normal reproduction of the phytoplankton such as diatom which utilized silicate for growth.
出处
《生态科学》
CSCD
北大核心
2013年第4期509-513,共5页
Ecological Science
