| 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 |
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| 引用本文： | 宋国栋,刘素美.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[J].海洋学报(英文版),2015,34(4):84-91. |
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| 作者姓名： | 宋国栋 刘素美 |
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| 作者单位： | 中国海洋大学海洋化学理论与工程技术教育部重点实验室, 中国海洋大学化学化工学院, 青岛 266100,中国海洋大学海洋化学理论与工程技术教育部重点实验室, 中国海洋大学化学化工学院, 青岛 266100;海洋科学与技术青岛协同创新中心, 青岛 266100 |
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| 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), 6.39–13.73μmol/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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| 关 键 词： | 磷的赋存形态 埋藏通量 沉积物 黄海 东海 |
| 收稿时间： | 2014/2/18 0:00:00 |
| 修稿时间： | 7/4/2014 12:00:00 AM |
Phosphorus speciation and distribution in surface sediments of the Yellow Sea and East China Sea and potential impacts on ecosystem |
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| SONG Guodong and 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. |
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| Authors: | SONG Guodong and LIU Sumei |
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| Institution: | 1.Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China2.Key Laboratory of Marine Chemistry Theory and Technology of Ministry of Education, College of Chemistry and Chemical Engineering, Ocean University of China, Qingdao 266100, China;Qingdao Collaborative Innovation Center of Marine Science and Technology, Qingdao 266100, China |
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| Abstract: | 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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| Keywords: | phosphorus speciation burial flux sediment Yellow Sea East China Sea |
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