河川水中の細菌群集に及ぼす有機汚濁の影響
スポンサーリンク
概要
- 論文の詳細を見る
The effect of organic pollution on bacterial communities in river waters was studied by exaining the responses of the bacteria to different concentrations of organic nutrients in media. The enumeration of heterotrophic bacteria in waters was performed by using a 1.0agar medium containing 10g polypeptone, 5g yeast extract, and 2g glucose in one liter of aged river water, and 0.5, 0.2, 0.05 and 0.02 agar media containing polypeptone, yeast extract, and glucose at the concentrations of 1/2, 1/5, 1/20 and 1/50 of 1.0 agar medium, respectively. The maximum number of colonies was obtained on the 0.05 agar medium in both unpolluted waters and polluted waters. The number of colonies decreased with increasing the concentrations of organic nutrients in the agar medic. However, the response of the bacteria isolated from less polluted waters to the concentrations of organic nutrients were considerably different from those of the bacteria isolated from highy polluted waters. Most of the isolates from less polluted waters were able to grow only in a medium with the low concentrations of organic nutrients, whereas the isolates from highly polluted waters were able to grow well not only in the medium with the low concentrations of organic nutrients, but also in those with high concentrations. The former we tentatively named oligotrophs, and the latter, eutrophs. These results suggest that the number of eutrophic bacteria increases due to organic pollution in river water, and that the ratios of numbers of eutrophic bacteria to oligotrophic bacteria (which were predominant in less polluted waters) wolud increase.
- 日本水産學會の論文
著者
関連論文
- 水環境分野における大阪市立環境科学研究所の戦後の業績概略--昭和40年代半ば(1970年前後)〜昭和60年代(1985年前後)
- 有毒鞭毛藻Gambierdiscus toxicus(渦鞭毛藻綱)の着生生活にとっての宿主海藻類の役割
- 廃木材木炭による廃棄物埋立処分地浸出余水処理 - 変異原性及び有機物除去特性 -
- 木炭充填水路浄化法を前処理とした埋立処分地浸出余水処理
- 木炭充填水路浄化法による埋立処分地浸出余水処理
- 海面埋立廃棄物処分場酸化池内水中BODおよび窒素濃度の変動解析
- マグロ切り身のガス置換包装による品質保持
- 海面埋立廃棄物処分場酸化池内水におけるリン酸欠乏状態とリン酸欠乏が硝化活性に及ぼす影響
- 海面埋立処分地の水質制御と管理に関する大阪市立環境科学研究所の業績概略
- 海面埋立廃棄物処分場の自然酸化池における硝化・脱窒活性