抄録
The change in monosaccharide constituting the dissolved carbohydrates (DCHO) in the surface water of Lake Nakanuma, eutrophic lake in Japan, was traced by GLC method during decomposition experiment. It was estimated whether DCHO was labile or resistant for microbial decomposition from the view of monosaccharide composition. The DCHO in Lake Nakanuma water was decomposed more preferentially than the whole of the dissolved organic carbon (DOC) on the productive season. Among the DCHO glucose and galactose were decomposed more easily than the other monosaccharides in the lake water.
