其他题名Distribution Characteristics and Source Analysis of Organic Matter in Surface Sediments in the Changjiang Estuary and Its Adjacent Sea Areas in Summer of 2016
王晓峰1,2; 刘东艳3
; 吴辉3; 王玉珏1发表期刊海洋湖沼通报
ISSN1003-6482
2020
期号1页码:65-74
关键词长江口沉积物有机质碳、氮稳定同位素
研究领域Oceanography
英文摘要55 surface sediment samples were collected from Changjiang Estuary and its adjacent sea in the summer 2016. Grain sizes, total organic carbon (TOC), total nitrogen (TN),carbon and nitrogen stable isotopes (delta~(13)C and delta~(15)N) were analyzed to study the spatial distribution, sources and environmental indication of organic matters in surface sediment in the area. Significant correlations were found between terrestrial organic matter input, sediment grain gize, sea current and the spatial distribution of organic matter. In a comparison, higher TOC (>0.5%) and TN (>0.08%) values occurred in the south offshore of Changjiang Estuary and the offshore of Zhejiang province with fine grain size; lower TOC (<0.4%) and TN (<0.05%) values occurred in the northern Changjiang Estuary with sandy silt sediments. The results indicated that finer grain size was able to concentrate organic matter better. Ranges of delta~(13)C (-23.94~-20.49)and TOC/TN (6.45~11.16) indicated a mixture of terrestrial and marine derived organic matter. The relative contribution of the terrestrial-derived organic carbon (f: 13.00~58.45%) and marine-derived organic carbon (TOC_(marine): 0.12~0.55%) were analyzed to indicate that the proportion of marine and terrestrial input follow the spatial distance from coastal to offshore, and the pathway of the Changjiang Diluted Water. Marine organic matters were significantly increased at 123°E eastward. The range of delta~(15)N (3.66~5.38) indicated that the source of nitrogen in the surface sediments was affected by a variety of natural and artificial factors in the sea area. The indication of the nitrogen sources need to be further determined in conjunction with other relevant parameters.
中文摘要2016年夏季,在长江口及其邻近海域采集了55个表层沉积物样品,通过分析样品的粒级组成、总有机碳(TOC)、总氮(TN)及其稳定同位素(delta~(13)C和delta~(15)N)等相关指标,探讨了长江口邻近海域表层沉积物中有机质的空间分布特征、来源及环境指示意义。结果表明,有机质的空间分布与海域周边陆源有机质输入、沉积物粒径及海流影响密切相关,长江口外南侧海域和浙江外海泥质区是TOC、TN的高值区(TOC>0.5%, TN>0.08 %),长江口北侧的砂质粉砂区为低值区(TOC<0.4 %, TN<0.05%)。delta~(13)C(- 23.94~-20.49)与TOC/TN(6.45~11.16)的空间分布特征与数值范围显示,表层沉积物中有机质是海洋和陆地来源的混合;通过分析陆源有机碳的相对贡献率(f:13.00~58.45%)与海源有机碳(TOC_(marine):0.12~0.55%)可知,陆海物质来源比例的变化与离岸距离及长江冲淡水的路径密切相关,海源有机质在123°E以东海域显著增加。delta~(15)N(3.66~5.38)的数值显示,研究海域表层沉积物中氮的来源受该海域多种自然和人为因素的共同作用,对氮来源的指示方面需要进一步联合其他相关参数进行确定。
文章类型Article
资助机构科技基础性工作专项; 国家自然科学基金
收录类别CSCD
语种中文
CSCD记录号CSCD:6682664
引用统计
文献类型期刊论文
条目标识符http://ir.yic.ac.cnhttp://ir.yic.ac.cn/handle/133337/30375
专题中科院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
中科院海岸带环境过程与生态修复重点实验室
作者单位1.中国科学院烟台海岸带研究所海岸带环境过程与生态修复重点实验室,山东烟台264003;
2.中国科学院大学,北京100049;
3.华东师范大学河口海岸国家重点实验室,上海200062
推荐引用方式
GB/T 7714王晓峰,刘东艳,吴辉,等. 2016年夏季长江口及其邻近海域表层沉积物中有机质的分布特征与来源分析[J]. 海洋湖沼通报,2020(1):65-74.
APA王晓峰,刘东艳,吴辉,&王玉珏.(2020).2016年夏季长江口及其邻近海域表层沉积物中有机质的分布特征与来源分析.海洋湖沼通报(1),65-74.
MLA王晓峰,et al."2016年夏季长江口及其邻近海域表层沉积物中有机质的分布特征与来源分析".海洋湖沼通报 .1(2020):65-74.
PDF全文下载地址:
点我下载PDF
