초록

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본 연구는 여러 수생생태계에서 유기물의 동적순환에 따른 부유성 박테리아와 부착성 박테리아의 그램염색(gram-stain) 특성을 알아보기 위한 일련의 시도로서 일본에서 두번째로 크며 부영양화가 상당히 진전된 가스미가우라 호수에서 1년간, 매주 실시했다. 이 전형적인 부영양형(eutrophic) 수생생태계의 박테리아군집의 그램염색 특성은 중영양형(mesotrophic) 환경과 같이 유기물의 유입에 따라 변화함을 보여준다. 그램음성(negative) 박테리아군집은 부유성 박테리아군집이 약 57%, 부착성 박테리아군집이 약 53%이며, 두 군집의 통계분석은 서로 다른 특성을 보여준다. 부착성 박테리아군집은 그램 양성, 음성 모두 쇄설성 유기물 형성과 분해에 영향을 미친다. 또한 그램 음성 부유박테리아는 특히 용존 유기물의 동적순환에 관여한다.

Abstract ▼ AI-Helper

This investigation was performed in eutrophic lake within the framework of a series of studies to evaluate the significance of gram reaction for both bacterioplankton and attached bacteria in the dynamics of organic materials at various aquatic ecosystems. In Lake Kasumigaura as a representative of ...

This investigation was performed in eutrophic lake within the framework of a series of studies to evaluate the significance of gram reaction for both bacterioplankton and attached bacteria in the dynamics of organic materials at various aquatic ecosystems. In Lake Kasumigaura as a representative of the highly eutrophic freshwater environments, the gram-stain characteristics of the bacterial community changed with the influx of pulses of phytoplankton, as those in the meso trophic environments. The predominency of the gram-negative forms in the bacterial community was about 57% for bacterioplankton and about 53% for attached bacteria. The statistical analysis of the difference of these two distributions showed that these communites were different. Both gram-negative and gram-positive bacteria attached to particles were shown to effect the formation and degradation of particulate organic matter. Gram-negative bacteria plankton participate exclusively in the dynamics of dissolved organic matter.