检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
机构地区:[1]中国水产科学研究院黄海水产研究所,青岛266071
出 处:《环境科学》2007年第5期1001-1005,共5页Environmental Science
基 金:国家自然科学基金项目(40376037)
摘 要:2004-08-2005-05分4个航次对唐岛湾网箱养殖区的10个站的沉积物间隙水和上覆水中的溶解无机氮营养盐(NH4+-N、NO3--N、NO2--N)进行了现场调查,并使用Fick第一定理对该海区沉积物-水界面溶解无机氮的扩散通量进行了估算.结果表明,网箱养殖区的上覆水和沉积物间隙水中溶解无机氮均以NO3--N为主,分别占溶解无机氮总量的73.34%和61.45%;上覆水中溶解无机氮(DIN)和NO3--N含量的季节变化趋势一致,在2004-10达到峰值,NH4+-N的季节变化稍有不同;间隙水中溶解无机氮(DIN)和NO3--N、NH4+-N的变化趋势一致,表现为从5月份到8月份含量逐渐增加,到10月份达到最大,然后到次年2月份又减少;上覆水和间隙水中NO2--N的含量随养殖进程表现为一个逐步积累的过程.NH4+-N、NO3--N和NO2--N在沉积物-海水界面上的扩散通量分别为5.46、-5.04、8.71μmol/(m2.d),NO2--N的扩散释放对唐岛湾网箱养殖区的水环境质量影响较大.On basis of field data measured during 4 cruises from August 2004 to May 2005, concentrations of NH4^+ -N, NO3^- -N, NO2^- -N in overlying and interstitial waters of sediments in net-cage culture areas of Tangdao Bay were analyzed. Moreover, diffusive fluxes of dissolved inorganic nitrogen from sediments were estimated by Fick's first law. Results showed that the main form of inorganic nitrogen in overlying and interstitial waters of sediments was NO3^- -N, accounting for 73.34 % and 61.45 % respectively. Concentrations distributions of dissolved inorganic nitrogen (DIN) and NO3^- -N in overlying water varied seasonally, which got their maximum concentration in October 2004 while the NH4^+ -N concentration showed a little difference. The seasonal change of dissolved inorganic nitrogen (DIN) and NO3^- -N, NH4^- -N in interstitial water varied similarly and also got their maximum concentration in October 2004. The concentration of NO2^- -N in overlying and interstitial waters increased from spring to winter. The average fluxes of NH4^+ -N, NO3^--N, NO2^--N were separately 5.46, -5.04,8.71 μmol/(m^2 ·d). And NO2^- -N was the most diffusive flux component in net-cage culture area of Tangdao Bay.
关 键 词:网箱养殖区 上覆水 间隙水 无机氮 扩散通量 唐岛湾
分 类 号:X145[环境科学与工程—环境科学]
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:216.73.216.60