中文摘要：

微粒样品在一个洪水时期期间从 Changjiang 河系是镇定的，在 1997 年 5 月，并且与粒子联系的停靠港，稳定同位素和类脂化合物被检验。结果显示出减少(0。84% ～ 1.88%) 到河口的从上面的活动范围的器官的碳内容。器官的碳在 -24 的范围的微粒的δ ~(13 ) C 价值。9 X10~(-3) 到 -26。6 x 10 ~( 接近了大陆人 C_3vegetation 的同位素的签名的 -3), 。全部的微粒 n 链烷集中从 1.4 ～ 10 变化了。1 μ g /dm~3，或 from23.7 到全部的浮游物的 107 μ g /g。丰满的酸在所有样品是在场的，从 1.4to 5.4 μ g /dm~3，与浸透并且在碳数字的不饱和的直链、分叉的混合物从 C_(12 )到 C_(30 ) 。δ ~(13 ) C 和到氮内容的碳内容的比率在粒子之中显示陆上的输入(土壤有机物) 的优势。简历标记途径被用来在微粒样品识别源自陆地、本土的部分的相对部分。丰满的酸的分发在大多数粒子样品作为 triking 建议 phytoplanktonic 和微生物引起的信号。陆上的链烷被用来沿着主流估计陆上的输入的贡献。

英文摘要：

Particulate samples were collected from the Changjiang river system during a flood period, in May 1997, and POC, stable isotope and lipids associated with particles were examined. Results showed the decrease （0.84% ～ 1.88%） of organic carbon content from the upper reaches to the estuary.δ^13 values of particulate organic carbon was in the range of -24.9×10^-3 to -26.6×10^-3, which were close to the isotopic signature of continental C3 vegetation. Total particulate n-alkanes concentrations varied from 1.4 to 10.1μg/dm^3,or from 23.7 to 107μg/g of total suspended matter. Fatty acids were present in all the samples, from 1.4 to 5.4μg/dm^3, with saturated and unsaturated straight-chain and branched compounds in the carbon number range from C12 to C30. Both δ^13 and the ratio of carbon content to nitrogen content indicate the predominance of terrestrial inputs （soil organic matter） among the particles. The biomarker approach has been used to identify the relative portion of terrigenous and autochthonous fraction in the particulate samples. The distribution of fatty acids suggests a striking phytoplanktonic and microbial signal in most particle samples. The terrestrial alkanes are used to estimate the contribution of terrestrial inputs along the mainstream.