Si在胶州湾沉积物-海水界面上的交换速率和通量研究  

Benthic Exchange Rate and Flux of Dissolved Silicate at the Sediment-Water Interface in Jiaozhou Bay

作　　者：蒋凤华[1] 王修林[1] 石晓勇[1] 祝陈坚[1] 韩秀荣[1] 张蕾[1] 

机构地区：[1]中国海洋大学化学化工学院,青岛266003

出　　处：《青岛海洋大学学报（自然科学版）》2002年第6期1012-1018,共7页Journal of Ocean University of Qingdao

基　　金：国家自然科学基金 ( 401360 2 0;4 9976 0 2 7);教育部重点项目 ( 01110 );山东省基金 ( L2000E0 1);跨世纪优秀人才培养计划基金; 973国家重点基础研究发展规划项目 ( 001CB40970 3)资助。

摘　　要：本文应用实验室培养法研究了 Si O3 - Si在胶州湾 1 6个站位沉积物 -海水界面上的交换速率。考虑培养时间、取样时间和间隔等因素 ,采用连续函数的方法计算了 Si O3 - Si交换速率。结果表明 ,Si O3 - Si在胶州湾沉积物 -海水界面上的交换表现为由沉积物向水体的释放 ,交换速率一般在因为 1～5mmol·m-2· d-1范围内 ,平均为 3.3mmol·m-2· d-1。高含量有机质沉积物 ,特别是生物扰动作用可以增大 Si O3 - Si交换速率。考虑胶州湾各种沉积物类型占胶州湾总面积的权重 ,Si O3 - Si在胶州湾沉积物 -海水界面上的交换通量为 1 .0 6× 1 0 9mmol·d-1 ,是河流输入量的 5.3倍 ,可提供浮游植物生长所需硅的 58%。Intact sediment cores were sampled at 16 sites in Jiaozhou Bay in July 2001. With laboratory incubation experiments, the benthic exchange rate of SiO_3-Si at the sediment-water interface was measured. The average SiO_3-Si exchange rate was calculated with a method which makes use of a continuous function, taking into consideration the culturing time, sampling time and time interval of sampling. The calculation shows that the exchange rate ranged from 1 to 5mmol·m -2·d -1 with a mean of 3.3mmol·m -2·d -1.By considering the area percentage of different sediment patterns in the total area of Jiaozhou Bay, the exchange flux of SiO_3-Si from the sediments to seawater in Jiaozhou Bay was estimated at 1.06×109mmol·d -1,which is 5.3 times of that of the river input. The exchange flux can provide 58% of the silicon required by the phytoplankton in Jiaozhou Bay. =

关 键 词：沉积物-海水界面 胶州湾 交换速率 硅 交换通量 

分 类 号：P736.21[天文地球—海洋地质] P734[天文地球—海洋科学]