%0 Journal Article
%T Spatial distributions of organic carbon and nitrogen and their isotopic compositions in sediments of the Changjiang Estuary and its adjacent sea area<br>长江口外海域沉积物中有机物的来源及分布
%A GAO Jianhua
%A WANG Yaping
%A PAN Shaoming
%A ZHANG Rui
%A LI Jun
%A BAI Fenglong
%A <br>高建华
%A 汪亚平
%A 潘少明
%A 张瑞
%A 李军
%A 白风龙
%J 地理学报(英文版)
%D 2008
%I 
%X 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.
%K total organic carbon
%K total nitrogen
%K stable carbon and nitrogen isotopes
%K material sources
%K Changjiang Estuary and its adjacent sea area<br>长江口
%K 外海域
%K 沉积物
%K 有机物
%K 来源
%K 分布
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=E62459D214FD64A3C8082E4ED1ABABED5711027BBBDDD35B&cid=869B153A4C6B5B85&jid=E7E6A89DD0CE36AA3756C02EB6F15CA7&aid=C69BB75C0ADBACBEB7964A9B5A382279&yid=67289AFF6305E306&vid=13553B2D12F347E8&iid=CA4FD0336C81A37A&sid=D997634CFE9B6321&eid=9FFCC7AF50CAEBF7&journal_id=1009-637X&journal_name=地理学报(英文版)&referenced_num=0&reference_num=28