Bacterial Abundance and Heterotrophic Activity in Sudong Stream

수동천에서의 세균의 분포와 생리적 활성도

  • 최성찬 (서울대학교 자연과학대학 미생물학과) ;
  • 김상종 (서울대학교 자연과학대학 미생물학과)
  • Published : 1988.12.01

Abstract

The density of heterotrophic bacterial population and heterotrophic activity were measured at monthly interval from March, 1986 to March, 1987 at four sites in the Sudong Stream, a tributary of North Han River. Total bacterial numbers and maximum uptake velocity ($V_{max}$) of glucose ranged as 0.8-$25.2\times 10^{5}$ cells/ml, 0.0006-24.39.$\mu$gC/1/hr, respectively. $V_{max}$ of glucose showed marked seasonal periodicity, with highest values in summer. But density of viable bacteria varied considerably, with no definite seasonal pattern. At the nucontaminated site which located in upstream, heterotrophic bacterial population and activities were relatively low, and small variations were observed downstream flowing except the site where animal originated sewage inputs occurred. And this large input of allochthonous materials and bacteria was an important factor for the stream condition.

Keywords

Sudiong stream;heterotrophic bacteria;distribution;geterotrophic activity