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珠江口和邻近海域沉积有机质的来源及其沉积通量的时空变化

张 凌 陈繁荣 殷克东 张德荣 杨永强 吕 莹

张 凌, 陈繁荣, 殷克东, 张德荣, 杨永强, 吕 莹. 珠江口和邻近海域沉积有机质的来源及其沉积通量的时空变化[J]. 环境科学研究, 2009, 22(8): 875-881.
引用本文: 张 凌, 陈繁荣, 殷克东, 张德荣, 杨永强, 吕 莹. 珠江口和邻近海域沉积有机质的来源及其沉积通量的时空变化[J]. 环境科学研究, 2009, 22(8): 875-881.
ZHANG Ling, CHEN Fan-rong, YIN Ke-dong, ZHANG De-rong, YANG Yong-qiang, Lv Ying. Spatial and Temporal Variations of Sedimentary Organic Matter Origin and Accumulation Rate in the Pearl River Estuary and Adjacent Coastal Waters of South China Sea[J]. Research of Environmental Sciences, 2009, 22(8): 875-881.
Citation: ZHANG Ling, CHEN Fan-rong, YIN Ke-dong, ZHANG De-rong, YANG Yong-qiang, Lv Ying. Spatial and Temporal Variations of Sedimentary Organic Matter Origin and Accumulation Rate in the Pearl River Estuary and Adjacent Coastal Waters of South China Sea[J]. Research of Environmental Sciences, 2009, 22(8): 875-881.

珠江口和邻近海域沉积有机质的来源及其沉积通量的时空变化

基金项目: 中国科学院知识创新工程重要方向性项目(KCX2-SW-212)

Spatial and Temporal Variations of Sedimentary Organic Matter Origin and Accumulation Rate in the Pearl River Estuary and Adjacent Coastal Waters of South China Sea

  • 摘要: 分析了珠江口和邻近海域沉积有机质(OM)的总有机碳(TOC)、总氮(TN)及稳定碳同位素组成〔δ(13C)〕等地球化学参数,并对有机质的来源和沉积通量进行了研究. 结果表明,珠江口沉积有机质来自大陆(52%)和水生(48%)混合来源;而邻近海域沉积有机质主要为水生来源(93%). 珠江口陆源有机质含量〔w(T-OC)为5.4  mg/g〕远远高于邻近海域(0.49  mg/g),近年来珠江口TOC和陆源有机质(T-OC)的平均沉积通量分别为5.57和2.2~3.6 mg/(cm2·a),说明珠江河口接受了大量的陆源有机物的输入,这是由于自20世纪后期的几十年以来,华南地区经济快速增长造成大量土地开垦,以及工农业生产和生活污水的排放所致. 珠江口和邻近海域的水生有机质沉积通量在近年均呈增加趋势,在珠江口达到最大值3.6 mg/(cm2·a),说明大量的营养物质导致水体的富营养化,从而促使水域初级生产力的增长.

     

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出版历程
  • 收稿日期:  2008-11-20
  • 修回日期:  2009-01-05
  • 刊出日期:  2009-08-25

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