东海赤潮高发区沉积物中营养盐再生速率的研究

应用生态学报 ›› 2003, Vol. ›› Issue (7): 1112-1116.

东海赤潮高发区沉积物中营养盐再生速率的研究

戚晓红¹, 刘素美¹, 张经^1,2, 陈洪涛¹

1. 中国海洋大学化学化工学院, 青岛 266003;
2. 华东师范大学河口海岸国家重点实验室, 上海 200062

收稿日期:2002-12-18 修回日期:2003-02-26 出版日期:2003-07-15
通讯作者: 戚晓红,女,1980年生,硕士研究生,主要从事海洋生物地球化学研究.E-mail:qx-h1980@163.com.
基金资助:
国家重点基础研究发展规划资助项目(G1999043705和2001CB409703).

Nutrients regeneration speed of sediment in harmful algae blooms(HAB) area of East China Sea

QI Xiaohong¹, LIU Sumei¹, ZHANG Jing^1,2, CHEN Hongtao¹

1. College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266003, China;
2. State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China

Received:2002-12-18 Revised:2003-02-26 Online:2003-07-15

摘要/Abstract

摘要： 2001年5月和2002年5月在东海赤潮高发区的4个站位(E4、E5、DB6、DC10)对沉积物表面分别充氮气和空气进行培养,研究沉积物水界面营养盐交换通量在不同条件下的变化规律,以及该海域沉积物中营养盐的再生对水体中营养盐的贡献.结果表明,各溶解态营养盐在还原条件下的迁移较为活跃.在距离陆地较近的海域,营养盐一般由水向沉积物中扩散,且距陆地越近,交换通量越大;而在上升流区,营养盐多由沉积物中向水中扩散.东海赤潮高发区沉积物是SiO₃^2-的源,对初级生产力的贡献占6%.同时,东海赤潮高发区沉积物是氮、磷营养盐蓄积库.该海域沉积物每年从水体中吸附的DIN、PO₄^3--分别占长江输入的5.9%、67%,沉积物水界面对水体中SiO₃^2-的贡献占7.8%.

Abstract: The fluxes of dissolved nutrients at sediment-water interface were investigated at 4 stations in the HAB area of East China Sea in May 2001 and May 2002. The benthic fluxes of nutrients were determined by incubating the sediment core samples with bottom seawater bubbled with air or nitrogen. The transfer of nutrients was more active under anoxic condition. The fluxes of dissolved nutrients were generally high at the stations close to the coast. The sediment was the source of SiO₃^2-, which accounted for 6% of primary production. For DIN and PO₄^3-, the sediment was the sink. DIN and PO₄^3- adsorbed by sediment accounted for 5.9% and 67% of the riverine DIN and PO₄^3- inputs, respectively, and the inputs of SiO₃^2- accounted for 7.8%.

中图分类号:

X834
X55

戚晓红, 刘素美, 张经, 陈洪涛. 东海赤潮高发区沉积物中营养盐再生速率的研究[J]. 应用生态学报, 2003, (7): 1112-1116.

QI Xiaohong, LIU Sumei, ZHANG Jing, CHEN Hongtao. Nutrients regeneration speed of sediment in harmful algae blooms(HAB) area of East China Sea[J]. Chinese Journal of Applied Ecology, 2003, (7): 1112-1116.

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