胶州湾大沽河口潮滩间隙水中PO_4-P和NH_4-N分布及扩散通量研究  

Study on Distributions of PO_4-P and NH_4-N in Porewater and Their Diffusion Fluxes in the Tidal Flat of Daguhe Estuary,Jiaozhou Bay

作　　者：张帆[1] 任一平[1] 葛长字[2] 徐宾铎[1] 陈聚法[3] 

机构地区：[1]中国海洋大学水产学院,山东青岛266003 [2]山东大学威海分校海洋学院,山东威海264209 [3]中国水产科学研究部黄海水产研究所,山东青岛266071

出　　处：《海洋科学进展》2011年第4期455-464,共10页Advances in Marine Science

基　　金：国家海洋公益性行业科研专项--胶州湾湿地生态系统功能保护与生态修复研究(200805066);国家自然科学基金项目--海水网箱养殖自身污染营养盐来源及环境负荷模型研究(30700619);国家自然科学基金项目--应用营养谱研究胶州湾底层鱼类群落的营养结构及其季节变化(41006083);高等学校博士学科点专项科研基金资助课题--高营养级鱼类的捕食对主要经济鱼类数量动态的影响(200804231015)

摘　　要：2009年2,5,8和11月在胶州湾大沽河口潮滩3个站位采集沉积物柱状样,分析了间隙水PO4-P,NH4-N的垂直分布,并用原柱样静态实验测定了沉积物-水界面PO4-P,NH4-N的交换通量。结果表明,间隙水中PO4-P和NH4-N浓度变化范围相当,分别为0～0.049mmol/L和0～0.050mmol/L。间隙水中PO4-P浓度在冬季东潮滩和春季河口区较高;间隙水NH4-N浓度在春季河口区和秋季西潮滩较高。间隙水中PO4-P和NH4-N浓度在垂直方向上波动较大,随深度增大无确定变化趋势。沉积物-水界面PO4-P和NH4-N的交换通量的变化范围分别为-0.13～0.26mmol/(m2.d)和-0.90～0.15mmol/(m2.d)。另外,沉积物-水界面的PO4-P和NH4-N交换通量在夏季很低。Sediment cores were collected at three stations in the tidal flat of Daguhe Estuary in February, May, August and November, 2009. The vertical distributions of PO4-P and NH4-N in porewater were analyzed, and the PO4-P and NH4-N fluxes at the sediment-water interface were calculated with intact sediment core＇s incubation method. The results indicate that the variation ranges of PO4-P and NH4-N concentrations in the porewater are 0-0. 049 mmol/L and 0-0.050 mmol/L , respectively. The PO4-P concentration in the porewater is high at the eastern tidal flat in winter and at the river mouth in spring, and the NH4-N concentration is high at the river mouth in spring and at the western tidal flat in autumn. The PO4-P and NH4-N concentrations show significant vertical fluctuation, but they exhibited no regular distri bution patterns. The annual variation ranges of PO4 P and NH3 N fluxes were -0. 13 - 0. 26 mmol/ （m2 · d） and 0.90-0.15 mmol/（m2 · d）, respectively. In addition, the PO4-P and NH4-N fluxes at the sediment-water interface are very low in summer.

关 键 词：河口潮滩 营养盐 间隙水 扩散通量 

分 类 号：X141[环境科学与工程—环境科学]