Escherichia coli and total coliforms in water and sediments at lake marinas
Escherichia coli and total coliforms in water and sediments at lake marinas
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DOI：
10.1016/s0269-7491(02)00173-2
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发表时间：
2002-01-01
影响因子：
8.9
通讯作者：
Breidenbach, GP
中科院分区：
文献类型：
--
作者：
An, YJ;Kampbell, DH;Breidenbach, GP
1999年9月至2001年10月期间，在位于俄克拉荷马州和得克萨斯州边界的得克萨斯湖的五个码头监测了大肠杆菌（一种粪大肠菌群）和总大肠菌群。总的趋势是E.大肠杆菌在夏季较低，这是由于德克索玛湖的粪便负荷较低，以及湖泊的生态条件，如原生动物更活跃的放牧和大肠杆菌的活力较低。大肠杆菌中。总大肠菌群密度在夏季明显升高。E.大肠杆菌含量随深度增加而增加，底层水样中大肠杆菌密度较高。大肠杆菌主要是由于它们与颗粒的结合。与休闲划船活动有关的汽油销售量与E.杆菌这表明，在湖泊码头的娱乐性划船活动可能会重新悬浮底部沉积物与结合E。大肠杆菌，以及E.在码头大肠杆菌不是最近粪便污染的迹象。E.大肠杆菌的检出密度最高的是码头，其次是加油站和码头入口。底质细菌计数结果表明，底质中大肠杆菌的密度随时间的延长而增加。沉积物中大肠菌群和总大肠菌群的含量明显高于湖水。(C)2002爱思唯尔科技有限公司版权所有。
Escherichia coli, a fecal coliform, and total coliforms were monitored between September 1999 and October 2001 in five marinas at Lake Texoma, located on the Oklahoma and Texas border. The general trend was that densities of E. coli were lower in the summer season due to the lower loading of fecal material into Lake Texoma and the ecological conditions of the lake, such as more vigorous grazing by protozoa and less viability of E. coli at an elevated temperature. The densities of total coliforms greatly increased in the summer. E. coli levels increased with depth, and the bottom water samples had higher densities of E. coli mainly due to their association with particles. There was a direct relationship between amount of gasoline sold, which was related to recreational boating activity, and the resuspension of E. coli. This indicated that recreational boating activity in lake marinas may have resuspended bottom sediments with bound E. coli, and the presence of E. coli in marinas was not an indication of recent fecal contamination. E. coli were detected in the largest densities at the boat dock points, followed by the gasoline filling station, and marina entrance. In addition, enumeration of bacteria in bottom sediment showed that the densities of E. coli and total coliforms in sediment were much higher compared to those in lake water. (C) 2002 Elsevier Science Ltd. All rights reserved.