中文摘要：

为更好在黄海 YS 和华东海 ECS 在海洋的生态系统上在最重要的钓鱼根据和压力之一上理解磷 P 周期和它的影响，在沉积区分不同 P 种形成的内容并且有它的分发和 bioavailability 的知识是必要的。在这研究，修改 SEDEX 过程被采用确定在沉积的 P 的不同形式。在表面沉积的磷部分的内容是为 exchangeable-P Exch-P 的 0.200.89 mol/g，为 Fe 固定的 P Fe-P 的 0.372.86 mol/g，为 authigenic 帽子 ACa-P 的 0.613.07 mol/g，为 detrital-P 的 6.3913.73 mol/g 弹跳并且为器官的 P OP 的 0.5410.06 mol/g。Exch-P， Fe-P 和 OP 的分发似乎类似。Exch-P， Fe-P 和 OP 的集中在华东海比那在黄海是稍微更高的，并且低集中能在 ECS 和西南的中间的部分被观察离开济州岛。ACa-P 的分发与 Exch-P， Fe-P 和 OP 的那些不同。弹跳是在研究区域的沉积 P 的主要部分。Exch-P， Fe-P 和 OP 的和可以被认为是潜在地在研究区域的 bioavailable P。在 TP 的 bioavailable P 的百分比从 13% ～ 61%。显得地区性的 Bioavailable P 埋葬流动差别被埋葬流动几乎与 TP 的一样的 bioavailable P 的沉积率，孔和 bioavailable P 内容，和分发影响埋葬流动。

英文摘要：

For better understanding the phosphorus （P） cycle and its impacts on one of the most important fishing grounds and pressures on the marine ecosystem in the Yellow Sea （YS） and East China Sea （ECS）, it is essential to distinguish the contents of different P speciation in sediments and have the knowledge of its distribution and bioavailability. In this study, the modified SEDEX procedure was employed to quantify the different forms of P in sediments. The contents of phosphorus fractions in surface sediments were 0.20–0.89μmol/g for exchangeable-P （Exch-P）, 0.37–2.86μmol/g for Fe-bound P （Fe-P）, 0.61–3.07μmol/g for authigenic Ca-P （ACa-P）, 6.39–13.73μmol/g for detrital-P （DAP） and 0.54–10.06μmol/g for organic P （OP）. The distribution of Exch-P, Fe-P and OP seemed to be similar. The concentrations of Exch-P, Fe-P and OP were slightly higher in the Yellow Sea than that in the East China Sea, and low concentrations could be observed in the middle part of the ECS and southwest off Cheju Island. The distribution of ACa-P was different from those of Exch-P, Fe-P and OP. DAP was the major fraction of sedimentary P in the research region. The sum of Exch-P, Fe-P and OP may be thought to be potentially bioavailable P in the research region. The percentage of bioavailable P in TP ranged from 13%to 61%. Bioavailable P burial flux that appeared regional differences was affected by sedimentation rates, porosity and bioavailable P content, and the distribution of bioavailable P burial flux were almost the same as that of TP burial flux.