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首页> 外文期刊>Estuarine Coastal and Shelf Science >The biogeochemical cycling of phosphorus in the upper ocean of the East China Sea
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The biogeochemical cycling of phosphorus in the upper ocean of the East China Sea

机译：东海上层海洋磷的生物地球化学循环

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Natural activities of ~(32)P (t_(1/2) = 14.3 days) and ~(33)P (t_(1/2) = 25.3 days) in total dissolved P (TDP), suspended particulate matter, net-plankton and rainwater during the spring of 2001 were measured by an ultra-low level liquid scintillation counter. A continuous steady-state model was used to estimate residence times of various phosphorus pools and uptake rates of the biological food chain within the upper ocean of the East China Sea. ~(32)p/~(33)p ratios increased from the dissolved pools to the suspended matter and to net-plankton, reflecting that the age of P increased as one moved up through the food chain. The residence times of P in the dissolved pools of coastal water and mid-shelf area were very short (3―4 days), which suggests that low phosphorus concentrations could support relatively high levels of primary production. A phytoplankton assimilating flux of 189―814 mgCm~(-2)day~(-1) and a zooplankton grazing flux of 10―161 mg C m~(-2) day~(-1) were also estimated and show that grazing rates of carbon corresponded to 3-20% of primary production. In addition, the particulate organic carbon fluxes from the upper ocean were calculated by directly comparing the measured seawater inventory of ~(32)P and ~(33)P to that measured in rain, and were found to range between 8.5 and 81.0 mmol m~(-2) day~(-1). These results show that the naturally produced ~(32)P and ~(33)P can provide much needed information regarding the biogeochemical cycling of P in marine systems and can be of use in the development of ecosystem models that seek to address mechanisms that affect primary production in the ocean.
机译：在总溶解磷（TDP），悬浮颗粒物，净值中，〜（32）P（t_（1/2）= 14.3天）和〜（33）P（t_（1/2）= 25.3天）的自然活动用超低位液体闪烁计数器测量了2001年春季的浮游生物和雨水。使用连续稳态模型估算东海上层海洋中各种磷池的停留时间和生物食物链的吸收率。 〜（32）p /〜（33）p的比率从溶解池到悬浮物再到浮游植物，这表明P的年龄随着食物链的向上移动而增加。磷在沿海水和架子中部溶解池中的停留时间非常短（3-4天），这表明低磷浓度可以支持较高水平的初级生产。浮游植物的同化通量为189〜814 mgCm〜（-2）·天〜（-1），浮游动物的放牧通量为10〜161 mg Cm〜（-2）·天〜（-1），表明了放牧碳的比率相当于初级生产的3-20％。此外，通过直接将测得的〜（32）P和〜（33）P海水存量与雨中测得的海水存量直接比较，计算出了来自上层海洋的颗粒有机碳通量，其范围在8.5至81.0 mmol·m之间。 〜（-2）天〜（-1）。这些结果表明，天然产生的〜（32）P和〜（33）P可以提供有关海洋系统中P的生物地球化学循环的急需信息，并且可以用于寻求解决影响机理的生态系统模型海洋中的初级生产。

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