Characteristic of the Organic Carbon-isotope Composition and Contribution of Suspended Matter in the Pearl River

  • 1. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou, Guangdong 510640;
    2. Guangdong Institute of Eco-environment and Soil, Guangzhou, Guangdong 510650;
    3. Guangdong Laboratory of Integrated Control of Agro-environment, Guangzhou, Guangdong 510650

Received date: 2002-09-05

  Revised date: 2002-11-20

  Online published: 2003-07-20


The paper studies the characteristic of the contribution and seasonal change of organic carbon isotope composition(δ13C) in the Pearl River. According to the δ13C value of C3, C4 plant and river suspended matter, we can discern the state of plant covered in different water and soil loss area. The water and soil loss area in the Dongjiang River basin was mainly grassland and cropland. The water and soil loss area in Beijiang River basin was lots of subtropical forests. The results indicated that we can discern the condition of plant covered in different basins. POC of Beijiang mainly originated from forest area and its carbon-isotope composition was affected by C3 plant. The carbon-isotope composition of Xijiang is between that of Beijiang and Dongjiang's. It indicated that the suspended matter was affected by C3 and C4 plant at the same time. And part of POC in Xijiang River originated from the soil covered by forest, some came from grassland and cultivated land.

Cite this article

WEI Xiu-Guo, SHEN Cheng-De, SUN Yan-Min, YI Wei-Xi . Characteristic of the Organic Carbon-isotope Composition and Contribution of Suspended Matter in the Pearl River[J]. SCIENTIA GEOGRAPHICA SINICA, 2003 , 23(4) : 471 -476 . DOI: 10.13249/j.cnki.sgs.2003.04.471


[1] Sackett W M, Thompson R R. Isotopic organic carbon composition of recent continental derived clastic sediments of eastern gulf coast, Gulf of Mexico[J]. Bull. Am. Assoc. Petrol. Geol.,1963,47:525-531.
[2] Sackett W M. The depositional history and isotopic organic carbon composition of marine sediments[J]. Mar. Geol. 1964, 2:173-185.
[3] Hunt J M. The significance of carbon isotope variations in marine sediments. Hobson G D. Advances in Organic Chemistry. Oxford: Pergamon Press, 1970.27-35.
[4] Shultz D J, Carder J A. Organic carbon 13C/12C variations in estuarine sediments[J]. Geochim. et Cosmochim, Acta,1976,40:381-385.
[5] 蔡德陵,蔡爱智.黄河口区有机碳同位素地球化学[J].中国科学(B辑),1993,23(10):1105~1113.
[6] 蔡德陵,Tan F C.长江口区有机碳同位素地球化学[J].地球化学,1992,21(3):305~311.
[7] Tan F C,Cai D L, Edmond J M. Carbon isotope geochemistry of the Changjiang Estury[J]. Estuaine, Coastal and Shelf Science,1991,32(4):395-403.
[8] 施光春.长江口悬浮颗粒有机碳的稳定同位素[J].海洋通报,1993,12(1):49~53.
[9] Milliman J D, Xie Q C, Yang Z. Transfer of particulate organic carbon and nitrogen from the Yangtze River to the Ocean[J]. American Journal of Science,1984, 284:824-834.
[10] Hedges J I,Quay P D, Richey J E, et al. Composition and fluxes of particulate organic material in the Amazon River[J]. Limnol Oceanogr., 1986, 31(4):717-738.
[11] Hedges J I, Parker P L. Land-derived organic matter in surface sediments from the Gulf of Mexico[J]. Geochim. et Cosmochim,Acta,1976,40:1019-1029.
[12] Mariotti A, Gadel F, Giresse P, et al. Carbon isotope composition and geochemistry of particulate organic matter in the Congo River(Central Africa):Application to the study of Quaternary sediments off the mouth of the river[J]. Chemical Geology(Isotope Geoscience Section),1991,86:345-357.
[13] Pocklington R, Tan F C. Seasonal and annual variations in the organic matter contributed by the St. Lawrence River to the Gulf of St. Lawrence[J]. Geochemica et Cosmochemica Acta,1987,51:2579-2586.
[14] 沈承德,刘东生,彭少麟,等.鼎湖山自然保护区森林土壤14C测定及14C示踪初步研究[J].科学通报,1998,43(16):1775~1780.
[15] 高全洲,沈承德,孙彦敏,等.珠江马口站、河口站断面水体有机碳含量的季节变化[J].地球化学,1999,28(3):273~280.
[16] 高全洲,沈承德,孙彦敏,等. 珠江流域的化学侵蚀[J]. 地球化学,2001,31(3):223~230.
[17] 魏秀国,沈承德,孙彦敏,等. 河流、河口沉积物中碳同位素研究[J].自然科学进展,2002,12(11):1135~1139.
[18] Gao Q Z, TAO Z,Shen C D, et al. Riverine organic carbon in the Xijiang River (South China): seasonal variation in content and flux budget[J]. Environmental Geology, 2002,41:826-832.
[19] Dacidson G R. The stable isotope composition and measurement of carbon in soil CO2[J]. Geochemica et Cosmochemica Acta,1995,59:2485-2489.
[20] Bird M I, Chivas A R, Head J A. Latitudinal gradient in carbon turnover times in forest soils[J]. Nature,1996, (381):143-146.
[21] 林植芳,郭俊彦. 广东的C4和CAM植物[J].中国科学院华南植物研究所集刊,1986,(2):171~178.
[22] 王永吉,吕厚远,王国安,等. C3,C4植物和现代土壤中硅酸体碳同位素分析[J].科学通报,2000,45(9):978~982.
[23] Cauwet G. Distribution and behavior of organic and inorganic carbon in the Changjiang Esturary[A]. Yu G H. Proceedings of the International Symposium on Biogeochemical Study of the Changjiang Esturary and its Adjacent Coastal Waters of the East China Sea[C]. Beijing: China Sea Press,1990.570-588.
[24] 沈承德,易惟熙,孙彦敏,等.鼎湖山森林土壤14C表观年龄及δ13C分布特征[J].第四纪研究,2000,20(4):335~344.