| 长江口外海域沉积物中有机物的来源及分布 |
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| 引用本文： | 高建华,汪亚平,潘少明,张瑞,李军,白风龙.长江口外海域沉积物中有机物的来源及分布[J].地理学报(英文版),2008,18(1):46-58. |
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| 作者姓名： | 高建华 汪亚平 潘少明 张瑞 李军 白风龙 |
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| 作者单位： | [1]Key Laboratory of Coast and Island Development of Ministry of Education, Nanjing University, Nanjing210093, China [2]Qingdao Institute of Marine Geology, Qingdao 266071, China |
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| 基金项目： | National Basic Research Program of China, No.2002CB412401; National Natural Science Foundation of China, No.40506022; No.40506013; Natural Science Foundation of Jiangsu Province, No.BK2006131 |
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| 摘 要： | The spatial distribution patterns of total organic carbon and total nitrogen show significant correlations with currents of the East China Sea Shelf. Corresponding to distributions of these currents, the study area could be divided into four different parts. Total organic carbon, total nitrogen, and organic carbon and nitrogen stable isotopes in sediments show linear correlations with mean grain size, respectively, thus ＂grain size effect＂ is an important factor that influences their distributions. C/N ratios can reflect source information of organic matter to a certain degree. In contrast, nitrogen stable isotope shows different spatial distribution patterns with C/N and organic carbon stable isotope, according to their relationships and regional distributions. The highest contribution （up to 50%） of terrestrial organic carbon appears near the Changjiang Estuary with isolines projecting towards northeast, indicating the influence of the Changjiang dilution water. Terrestrial particulate organic matter suffers from effects of diagenesis, benthos and incessant inputting of dead organic matter of plankton, after depositing in seabed. Therefore, the contribution of terrestrial organic carbon to particulate organic matter is obviously greater than that to organic matter in sediments in the same place.
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| 关 键 词： | 长江口 外海域 沉积物 有机物 来源 分布 |
| 收稿时间： | 2007-08-10 |
| 修稿时间： | 2007-09-29 |
Spatial distributions of organic carbon and nitrogen and their isotopic compositions in sediments of the Changjiang Estuary and its adjacent sea area |
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| Jianhua?Gao,Yaping?Wang,Shaoming?Pan,Rui?Zhang,Jun?Li,Fenglong?Bai.Spatial distributions of organic carbon and nitrogen and their isotopic compositions in sediments of the Changjiang Estuary and its adjacent sea area[J].Journal of Geographical Sciences,2008,18(1):46-58. |
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| Authors: | Jianhua Gao Yaping Wang Shaoming Pan Rui Zhang Jun Li Fenglong Bai |
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| Institution: | 1. Key Laboratory of Coast and Island Development of Ministry of Education, Nanjing University, Nanjing 210093, China
2. Qingdao Institute of Marine Geology, Qingdao 266071, China |
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| Abstract: | The spatial distribution patterns of total organic carbon and total nitrogen show significant correlations with currents of
the East China Sea Shelf. Corresponding to distributions of these currents, the study area could be divided into four different
parts. Total organic carbon, total nitrogen, and organic carbon and nitrogen stable isotopes in sediments show linear correlations
with mean grain size, respectively, thus “grain size effect” is an important factor that influences their distributions. C/N
ratios can reflect source information of organic matter to a certain degree. In contrast, nitrogen stable isotope shows different
spatial distribution patterns with C/N and organic carbon stable isotope, according to their relationships and regional distributions.
The highest contribution (up to 50%) of terrestrial organic carbon appears near the Changjiang Estuary with isolines projecting
towards northeast, indicating the influence of the Changjiang dilution water. Terrestrial particulate organic matter suffers
from effects of diagenesis, benthos and incessant inputting of dead organic matter of plankton, after depositing in seabed.
Therefore, the contribution of terrestrial organic carbon to particulate organic matter is obviously greater than that to
organic matter in sediments in the same place.
Foundation: National Basic Research Program of China, No.2002CB412401; National Natural Science Foundation of China, No.40506022; No.40506013;
Natural Science Foundation of Jiangsu Province, No.BK2006131
Author: Gao Jianhua (1973–), Associate Professor, specialized in coastal ocean science. |
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| Keywords: | total organic carbon total nitrogen stable carbon and nitrogen isotopes material sources Changjiang Estuary and its adjacent sea area |
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