| SONG Guodong,LIU Sumei.Phosphorus speciation and distribution in surface sediments of the Yellow Sea and East China Sea and potential impacts on ecosystem[J].Acta Oceanologica Sinica,2015,34(4):84-91 |
| 黄东海表层沉积物中磷的赋存形态和分布特征及其对生态系统的潜在影响 |
| Phosphorus speciation and distribution in surface sediments of the Yellow Sea and East China Sea and potential impacts on ecosystem |
| 投稿时间：2014-02-18 修订日期：2014-07-04 |
| DOI：10.1007/s13131-015-0653-4 |
| 中文关键词: 磷的赋存形态 埋藏通量 沉积物 黄海 东海 |
| 英文关键词:phosphorus speciation burial flux sediment Yellow Sea East China Sea |
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| 中文摘要: |
| 为了更好的揭示黄东海的磷循环及其对海洋生态系统的影响,有必要区分沉积物中不同赋存形态的磷的浓度,研究分布特征和生物可利用性.表层沉积物中可交换态磷、铁结合态磷、自生钙结合态磷、碎屑磷和有机磷的浓度范围分别是0.20-0.89,0.37-2.86,0.61-3.07,6.39-13.73和0.54-10.06 μmol/g.可交换态磷、铁结合态磷和有机磷的分布特征类似,并且在黄海的浓度略高于东海,但是在东海中部和济州岛西南出现低值.自生钙结合态磷的分布特征不同于可交换态磷、铁结合态磷和有机磷的分布.碎屑磷是沉积物中磷的主要赋存形态.可交换态磷、铁结合态磷和有机磷被认为是该区域的生物可利用磷,在总磷中所占百分比范围为13%-61%.生物可利用磷的埋藏通量受到沉积速率、孔隙率和生物可利用磷的浓度的影响,呈现出区域性差异,其埋藏通量的分布特征与总磷类似. |
| 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 0.20-0.89 μmol/g for exchangeable-P (Exch-P), 0.37-2.86 μmol/g for Fe-bound P (Fe-P), 0.61-3.07 μmol/g for authigenic Ca-P (ACa-P), 6.39-13.73 μmol/g for detrital-P (DAP) and 0.54-10.06 μmol/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. |
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