摘要
为研究海洋沉积物-水界面间营养盐的交换状况,进一步了解营养物质的循环动力学和水体富营养化的内在机理,采用实验室培养法,对海州湾海洋牧场2014年春季(5月)5个站位、夏季(8月)6个站位和秋季(10月)6个站位沉积物-水界面营养盐的交换速率和交换通量进行了研究。结果表明:海州湾沉积物-水界面上硅酸盐(Si O2-3-Si)、磷酸盐(PO_4^(3-)-P)在春季表现为由水体向沉积物进行迁移,其交换速率平均值分别为-3.27、-0.32 mmol/(m^2·d),夏季和秋季均表现为由沉积物向水体进行释放,夏季二者的交换速率平均值分别为8.53、0.41 mmol/(m^2·d),秋季分别为4.92、0.32 mmol/(m^2·d);溶解态无机氮(DIN)在春、夏、秋季均表现为由沉积物向水体进行释放,交换速率平均值分别为2.86、3.39、13.04 mmol/(m^2·d);海州湾沉积物-水界面SiO_2-3-Si、PO_4^(3-)-P、DIN的交换通量在3个季节的平均值分别为4.56×10~8、1.82×10~7、8.65×10~8mmol/d,沉积物可为海州湾初级生产力提供66%的SiO_2-3-Si、42%的PO_4^(3-)-P、124%的DIN营养供给。研究表明,海州湾海洋牧场沉积物-水界面营养盐的交换速率与国内外近岸海区相比处于中等水平。
The exchange rates and fluxes of nutrients on sediment-water interface were studied in Haizhou Bay u- sing a laboratory incubation method during spring （May; 5 stations）, summer （August; 6 stations） and autumn （ October; 6 stations） in 2014 to understand the exchange of nutrients on sediment-water interface and mechanisms of nutrient cycling and eutrophication. The results showed that Si O2-3-Si and （PO_4-（3-）-P） ions were fund to migrate from water to sediments at sediment-water interface in Haizhou Bay in Spring, with average rates of -3.27 and -0.32 mmol/（m2 · d） ; while they were released into the water in summer and autumn, with average rates of 8.53 and 0.41 mmol/（m2 · d） in summer and 4.92 and 0.32 mmol/（m2 ·d） in autumn. Dissolved inorganic nitrogen （DIN） was released into the water in three seasons, with average exchange rates of 2.86 mmol/（ m2 · d） in spring, 3.39 retool/（ m2 · d） in summer and 13.04 mmol/（m2 · d） in autumn. Exchange rates of nutrients inclu- ding SiO23-Si, pO34-P and DIN at sediment-water interface in Haizhou Bay were in a medium level compared to domestic and foreign coastal waters in three seasons, with average exchange fluxes of 4.56x10^8l/d for SiO2- Si, 1.82x107 mmol/d for pO34-P, and 8.65x10^8l/d for DIN. The nutrients from the sediment provided 66% of SIO23-Si, 42% of PO]-P and 124% of DIN for primary productivity in Haizhou Bay.
出处
《大连海洋大学学报》
CAS
CSCD
北大核心
2016年第1期95-102,共8页
Journal of Dalian Ocean University
基金
农业部转产转业项目--江苏省海州湾海洋牧场示范项目(D-8006-13-8023
D8006-12-8018)
国家公益性行业(农业)科研专项(201003068)
关键词
海州湾
沉积物-水界面
营养盐
交换速率
交换通量
Haizhou Bay
sediment-seawater interface
nutrient
exchange rate
exchange flux
