胶州湾沉积物-海水界面硅的交换速率及其影响因素探讨

汪雅露; 袁华茂; 宋金明; 李学刚; 李宁; 曲宝晓; 康绪明; 王启栋; 邢建伟; 梁宪萌

doi:10.3969/j.issn.0253-4193.2016.12.006

胶州湾沉积物-海水界面硅的交换速率及其影响因素探讨

doi: 10.3969/j.issn.0253-4193.2016.12.006

1.
中国科学院海洋生态与环境重点实验室, 山东青岛 266071;中国科学院大学, 北京 100039;青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室, 山东青岛 266071
2.
中国科学院海洋生态与环境重点实验室, 山东青岛 266071;青岛海洋科学与技术国家实验室海洋生态与环境科学功能实验室, 山东青岛 266071

基金项目: 国家重点基础研究发展计划项目课题（2015CB452902，2015CB452901）；国家基金委-山东省联合基金项目（U1406403）；青岛国家海洋实验室“鳌山人才”卓越科学家专项项目资助。

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出版历程
- 收稿日期: 2016-03-25

Benthic exchange rates of dissolved silicate at the sediment-water interface in the Jiaozhou Bay and the impact of relevant environmental factors

1.
Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;University of Chinese Academy of Sciences, Beijing 100039, China;Marine Ecology and Environmental Science Laboratory, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China
2.
Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;Marine Ecology and Environmental Science Laboratory, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266071, China

摘要

摘要: 采用实验室培养法在原位温度和溶氧条件下测定了胶州湾沉积物-海水界面硅的交换速率，并探讨了相关环境因子对界面交换速率的影响机制。结果表明，胶州湾沉积物-海水界面硅的交换表现为从沉积物向水体释放，其交换速率在947~4 889 μmol/（m²·d）范围内，平均速率为1 819 μmol/（m²·d）。表层沉积物中叶绿素a（Chl a）和总有机碳（TOC）是影响胶州湾沉积物-海水界面硅交换速率的主要环境因子，同时表层沉积物的含水率（φ）、生源硅（BSi）和粘土含量以及间隙水中溶解硅酸盐（DSi）对沉积物-海水界面硅的交换也有重要影响。由此可推知，胶州湾沉积物-海水界面硅的交换速率主要受生物活动和溶解-扩散双重过程调控，而表层沉积物粒度与底层水体中DSi对胶州湾硅的释放影响较小。
- 胶州湾 /
- 沉积物-海水界面 /
- 硅 /
- 交换速率 /
- 环境影响因子
Abstract: The benthic exchange rates of dissolved silicate (DSi) at the sediment-water interface in Jiaozhou Bay were measured by intact sediment cores incubation. Further, the impacts of environmental factors on the exchange rate were also discussed. Silicate transported from sediment to overlying water, and the exchange rate ranged from 947 to 4 889 μmol/(m²·d) with a mean of 1 819 μmol/(m²·d). Total organic carbon (TOC) and chlorophyll a(Chl a) in surface sediment which were relative with the biological activity were the dominant factors controlling the exchange rate of DSi. Moreover, water ratio(φ), biogenic silicate(BSi), clay content of sediment and DSi in the pore water also had important effects on the exchange process. As a result, the exchange of DSi at the sediment-water interface in Jiaozhou Bay was a consequence of dissolution-dilution process which was dominantly controlled by biological activity. Grain diameter of sediment and DSi in bottom water, however, were not relatively important when compared with those factors.
- Jiaozhou Bay /
- sediment-water interface /
- silicate /
- exchange rate /
- benthic environmental factor

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