摘要
1999年8月通过原样培养研究了黄海的桑沟湾和胶州湾潮下带沉积物—海水界面的营养盐通量。结果表明,两个湾的沉积物均向水层释放NH4 N,通量为0.76(桑沟湾)和0.67mmol/m2·d(胶州湾),对水层初级生产所需无机氮的贡献为14%(桑沟湾)和12%(胶州湾);桑沟湾的沉积物对PO4 P有净吸收,通量为-1.17mmol/m2·d,而胶州湾的沉积物释放PO4 P,通量为0.01mmol/m2·d。与其他近岸浅海环境相比,桑沟湾和胶州湾的沉积物—水界面营养盐通量及对水层初级生产的贡献率均处于较低水平。回归统计分析表明,桑沟湾和胶州湾沉积物—水界面的NH4 N通量与沉积物表层的C、N含量正相关,PO4 P通量与沉积物耗氧率和上覆水PO4 P浓度相关。
The assessment on the sediment's contribution to the nutrients in water column was done, and the fluxes of nutrients were measured at the sediment-water interface in Sanggou Bay and Jiaozhou Bay (Yellow Sea, China) on August, 1999. Ammonium was released into the water column from sediments at rates of 0.76 mmol/m^2·d (Sanggou Bay) and 0.67 mmol/m^2·d (Jiaozhou Bay) respectively, which may contribute 14% (Sanggou Bay) and 12% (Jiaozhou Bay) of requirements for primary production respectively. Phosphate was uptaken by the sediments in Sanggou Bay (-1.17mmol/m^2·d) but released from the sediments (0.01 mmol/m^2·d) in Jiaozhou Bay. The fluxes of both nutrients and their contribution to pelagic requirement at both bays were low compared with data from other shallow seawaters. Regression analysis shows that NH_4-N fluxes at the sediment-water in Sanggou Bay and Jiaozhou Bay vary positively with carbon and nitrogen content at the surficial sediment, and that phosphate fluxes are correlated with sediment oxygen consumption rates and phosphate concentration in the overlying seawater.
出处
《海洋环境科学》
CAS
CSCD
北大核心
2004年第1期1-4,共4页
Marine Environmental Science
基金
欧盟-中国合作项目(ERBIC18 CT98 0291)
科技部国际合作重点项目(2002CB714008)
国家自然科学基金(49906009)
973计划(2002CB412406)。
