Microbial Distribution at Sediments of Lake Daechung

대청호 퇴적층의 미생물 분포 밀도

  • Park, Dong-Jin (Korea Research Institute of Bioscience & Biotechnology, KIST) ;
  • Yuk, Youn-Su (Korea Research Institute of Bioscience & Biotechnology, KIST) ;
  • Park, Dae-Gyun (Korea Research Institute of Bioscience & Biotechnology, KIST) ;
  • Lee, Sang-Hwa (Korea Research Institute of Bioscience & Biotechnology, KIST) ;
  • Oh, Hee-Mock (Korea Research Institute of Bioscience & Biotechnology, KIST) ;
  • Kim, Chang-Jin (Korea Research Institute of Bioscience & Biotechnology, KIST)
  • Received : 1998.11.04
  • Accepted : 1998.11.23
  • Published : 1998.12.01

Abstract

In order to characterize the microbial distribution at sediments of Lake Daechung, soil samples were collected at two depths of 0.5~2 cm and 19~21 cm of Chudong(static) and Hoenam(streaming) site on May 18th(before rainy season) and on August 24th in 1998(after rainy season), and then the density(CFU/g soil) of microorganisms including bacteria, actinomycetes, and fungi was investigated by the viable cell counting method. Microbial density at streaming site was on the whole 3.9-fold higher than that at static site. Bacterial densities examined before and after rainy season was revealed to be similar, whereas actinomycetes and fungi exhibited higher distribution after and before rainy season, respectively. The microbial distribution was not generally reduced with the increase of depth and was rather higher at some deep sites. On comparing with the microbial densities of grass land around the lake, bacteria, actinomycetes, and fungi at lake sediments on the average showed the distribution of 52.9%, 35%, and 7%, respectively. However, their distribution except for fungi which exhibited 71.2% was mostly found to be somewhat higher than at the shore of lake.

Keywords

Lake Daechung;sediment;microbial distribution