Seasonal Variation of Eubacterial Community Structure and Their Structure Affecting Environmental Parameters in Reservoir

남매지에서 Eubacteria 군집구조의 계절적 변화와 그에 영향을 미치는 환경요인

  • 이희순 (대구대학교 생명과학부) ;
  • 박정원 (영남대학교 해양과학연구소) ;
  • 김미경 (영남대학교 해양과학연구소) ;
  • 이영옥 (대구대학교 생명과학부)
  • Published : 2002.03.01

Abstract

For elucidating the correlation between the eubacterial community structure and environmental parameters in Nammae Reservoir located in Kyungsan, Kyungbuk, the bacterial community structure and their structure affecting environmental parameters were analyzed using Fluorescent In Situ Hybridization (FISH) monthly over year. $\alpha$ . $\beta$ . $\gamma$-subclasses of Proteobacteria and Cytophaga-Flavobacterium (CF) group known as dominant bacterial group in freshwater were detected in 3 stations over year. The ratio of each subclass to total bacteria was determined; $\alpha$.$\beta$ . $\gamma$-subclasses and CF group varied in the range of 4.0~29.2%, 1.7~25.8%, 1.8~12.8%, 4.9~36.3%, respectively and there was no substantial differences between stations. In terms of the correlation between each group specific bacteria and environmental parameters such as temperature, SS, pH, DOC, NH$_4$-N, NO$_3$-N, PO$_4$-P, standing crops of algae, the results were as follows: 1) total bacterial numbers correlated positively with temperature, SS and DOC, 2) Eubacteria positively with DOC and Chl-$\alpha$, 3)${\gamma}$-subclass positively with DOC, and 4) CF group positively with standing crops of chlorophyceae, 5) whereas $\beta$-subclass bacteria correlated negatively with standing crop of cyanobacteria and that of total algae.

Keywords

algae;correlation coefficient;cyanobacteria;environmental factors;eubacteria;FISH

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