| 河口潮滩沉积物磷的季节性累积和生物有效性 |
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| 引用本文： | 欧冬妮,刘?? 敏,侯立军,余?? 婕,汪?? 青.河口潮滩沉积物磷的季节性累积和生物有效性[J].海洋科学,2007,31(2):20-26. |
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| 作者姓名： | 欧冬妮 刘?? 敏 侯立军 余?? 婕 汪?? 青 |
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| 作者单位： | 华东师范大学,地理学系,教育部地理信息重点实验室,上海,200062 |
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| 基金项目： | 国家自然科学基金资助项目(40131020,49801018)，教育部高等学校骨干教师资助计划项目，上海市重点学科资助项目(SHPAD-01) |
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| 摘 要： | 对长江口潮滩表层沉积生磷的赋存形态和含量的研究表明,碎屑态磷为沉积物中磷的主要形态,约占总磷的62.52%;铁结合态磷和有机磷次之,分别占总磷的18.06%和14.69%;自生磷灰石加钙结合态磷和吸附态磷最少。综合研究区内的各种理化条件,指出弱吸附态磷、铁结合态磷和有机磷是长江口潮滩潜在生物可利用磷,约占总磷的33.16%,是导致水体富营养化的潜在因素。上覆水的盐度效应是影响沉积物铁结合态磷含量的关键性因子;而自生磷灰石加钙结合态磷的含量变化则与上覆水的温度、溶氧量及沉积物有机质的分解有关;有机磷在时间和空间尺度上都存在较大变化,主要与潮滩生物动态过程,即磷的再矿化有关。
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| 关 键 词： | 表层沉积物 磷 生物有效性 潮滩 长江口 |
| 文章编号： | 1000-3096（2007）02-0020-07 |
| 收稿时间： | 2004-01-16 |
| 修稿时间： | 2004-05-18 |
Seasonal accumulation and bioavailabilities of phosphorous in the tidal flat surface sediments from the Yangtze estuary |
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| OU Dong-ni,LIU Min,HOU Li-jun,YU Jie,WANG Qing.Seasonal accumulation and bioavailabilities of phosphorous in the tidal flat surface sediments from the Yangtze estuary[J].Marine Sciences,2007,31(2):20-26. |
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| Authors: | OU Dong-ni LIU Min HOU Li-jun YU Jie WANG Qing |
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| Institution: | Department of Geography, Key Laboratory of Geographical Information of the Ministry of Education, East China Normal University, Shanghai 200062, China |
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| Abstract: | The species and contents of phosphorus were studied in the tidal flat surface sediments of the Yangtze estuary.The results showed that detrital apatite contributed 62.52% of total phosphorus,which is the main speciation of phosphorus.Iron-bound phosphate and organic phosphate respectively made up 18.06% and 14.69% of total phosphorus.While authigenic apatite plus calcium-bound phosphate and loosely adsorbed phosphate occupied the least of total phosphorus.According to all kinds of physico-chemical conditions in the study area,only loosely adsorbed phosphate,iron-bound phosphate and organic phosphate should be considered as the potential factors for eutrophication,which represented mean proportion of 33.16% of the total phosphorus.Salinity effect on the overlying waters was the key factor to the content of iron-bound phosphate,and authigenic apatite plus calcium-bound phosphate is relative to the water temperature,dissolved oxygen and decomposition of sedimentary organic matters.Organic phosphate was the only form to exhibit significant spatio-temporal variations,which were linked to the remineralization of phosphorus. |
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| Keywords: | surface sediment phosphorous bioavailabilities tidal flat the Yangtze estuary |
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