【摘 要】
：
Sediments and surface water were sampled in a tide flat in the Huiquan Bay,Qingdao,China in January 2004 to simulate the exchange of NH4-N/NO3-N/PO3-4 between s
【机 构】
：
North China Sea Branch of the State Oceanic Administration,Institute of Oceanology
论文部分内容阅读
Sediments and surface water were sampled in a tide flat in the Huiquan Bay,Qingdao,China in January 2004 to simulate the exchange of NH4-N/NO3-N/PO3-4 between sediments and surface water.A working system was designed with which samples were shaken at 60,120 and 150 revolutions per minute (r/min).Experiment results show that NH4-N concentration in water at shaking rate of 60r/min decreased gradually,while at 120r/min increased gradually.In resuspension,fine-grained sediments contributed most NH4-N to the seawater,followed by medium-grained and coarse-grained sediments.The NO3-N concentration in water had a negative relation with the shaking rate; the medium-grained sediments contributed more NO3-N to seawater than the coarse- and fine-grained sediments.The PO3-4 concentration is positively related with the shaking rate,the fine-grained sediments were the main N and P contributor to the seawater,followed by medium- and coarse-grained sediments.
其他文献
Nitric oxide (NO) Is a bioactive molecule involved in many biological events, and has been reported as pro-oxidant as well as anti-oxidant in plants. In the pre
Supported manganese oxide catalysts were prepared by incipient wetness impregnation method for methane cat-alytic combustion, and effects of the support (Al2O3,
Aerosol samples were collected at two coastal suburban stations,Qingdao (China) in 1995-1996 and Liverpool (U.K.) in 1995,respectively.The samples were analyzed
A bounded optimal control strategy for strongly non-linear systems under non-white wide-band random excitation with actuator saturation is proposed. First, the
CH4 and N2O fluxes from soil under a tropical seasonal rain forest in Xishuangbanna, Southwest China were measured for one year using closed static chamber tech
Since the construction of the Gezhouba Dam on the Yangtze River in 1981, it has been found that the Chinese Sturgeon, Acipensor sinensis, performs natural propa
This paper presents experimental and computational studies on the flow behavior of a gas-solid fluidized bed with disparately sized binary particle mixtures. Th
Seasonal netzplankton samples from stations in the Changjiang (Yangtze River) Estuary were collected from May,2004 to February,2005.The dominant species and the
Based on the theory of emergy analysis,a modified model of ecological footprint accounting,termed emergetic ecological footprint (EMEF) in contrast to the conve
The contents of nitrogen and organic carbon in an agricultural soil were analyzed using reflectance measurements (n=52)performed with an ASD FieldSpec-Ⅱspectroradiometer.For parameter prediction,empir