【摘要】 <正> 世界海洋水体中广泛分布着一种有机絮凝体,当其过滤至微孔滤膜上即呈膜状,称为有机包膜。近年来,国外许多学者用各种取样方法和观测手段对其作了研究。这是因为它无论是作为单独的微环境或是搬运因子都具有重要意义,但有关黄、东海有机包膜仅见零星报道,本文是首次对其特征、分布、成因及沉积作用进行系统论述。更多还原

【Abstract】 Suspended organic films of water samples taken from water column in the Yellow-East China Seas were studied by scanning electronic microscopy and energy dispersion X-ray analysis. Their characterstics, distribution, origin and sedimentation were presented and discussed. The results show that the organic films of very thin and transparent or semi-transparent plates consist mainly of elements such as C, H, O, N. The films are widely distributed through all the water column from top to bottom and it’s content is higher in the waters of Kuroshio current than that in shelf waters. Sometimes organic films can form pseudotropy of certain plankton organisms, indicating their biogenic origin. The films capture or absorb various suspended particles such as skeleton debris, soft parts of organisms, minerals and rock debris, acting not only as "sediment-micro-traps" for very small, drifting particulates in water column, but also as "deposition-accelarator", especially for the light, small organic particles. Thus, the films play an important role in the sedimentation of various suspended particles, including the carbon-bearing ones, which are essiential for the ocean flux study.更多还原