摘要 : The composition of the dominating populations within a bacterioplankton community was investigated in a mesotrophic, boreal forest lake. Composite samples were collected monthly throughout the lake for two years. The community com... 展开 The composition of the dominating populations within a bacterioplankton community was investigated in a mesotrophic, boreal forest lake. Composite samples were collected monthly throughout the lake for two years. The community composition was determined by denaturing gradient gel electrophoresis (DGGE) of a polymerase chain reaction (PCR)-amplified part of 16S rDNA, extracted from organisms smaller than 1 mu m. Temporal patterns of occurrence in the lake differed among populations. There was no clear seasonal pattern of variation, but there was a gradual change. The results suggest that variation in the amount of water flowing into the lake could explain some of the changes in the bacterioplankton community. (C) 1998 Federation of European Microbiological Societies. Published by Elsevier Science B.V. All rights reserved. [References: 40] 收起