Persistence of fecal indicator bacteria in Santa Monica Bay beach sediments
Persistence of fecal indicator bacteria in Santa Monica Bay beach sediments
复制标题
DOI：
10.1016/j.watres.2006.04.032
复制
发表时间：
2006-08-01
期刊：
影响因子：
12.8
通讯作者：
Jay, Jennifer A.
中科院分区：
文献类型：
--
作者：
Lee, Christine M.;Lin, Tiffany Y.;Jay, Jennifer A.
监测休闲海滩的水质只是了解微生物污染的一步，微生物污染是导致海滩关闭的主要原因。冲浪带沉积储集层通常被忽视，而且可能也很重要。这项研究涉及在风暴期间监测三个海洋海滩(两个裸露海滩和一个封闭海滩)水和沉积物中的粪便指示菌(FIB)水平，对这些海滩的沉积物进行实验室微型实验，以及调查13个海滩(一些裸露海滩和一些封闭海滩)的沉积物FIB水平。海水和沉积物中的大肠埃希菌和肠球菌浓度的峰值与两个裸露海滩的风暴活动相吻合，而在封闭的海滩，这两个FIB的水平一直很高，而且没有规律。微观世界实验的结果表明，上覆水和所有海滩沉积物中的FIB都有类似的急剧增长，海滩调查的结果也支持这样的假设，即静态环境而不是沉积物特征可以解释封闭海滩观察到的沉积物FIB水平升高的原因。这项工作对FIB测量的预测价值有影响，并指出了沉积物储集层的重要性。(C)2006爱思唯尔有限公司。保留所有权利。
Monitoring the water quality of recreational beaches is only one step toward understanding microbial contamination-the primary cause of beach closings. The surf zone sediment reservoir is typically overlooked and may also be important. This study involved monitoring the fecal indicator bacteria (FIB) levels in water and sediment at three ocean beaches (two exposed and one enclosed) during a storm event, conducting laboratory microcosm experiments with sediment from these beaches, and surveying sediment FIB levels at 13 beaches (some exposed and some enclosed). Peaks in Escherichia coli and enterococci concentrations in water and sediment coincided with storm activity at the two exposed beaches, while levels of both FIB were consistently high and irregular at the enclosed beach. Results from microcosm experiments showing similar, dramatic growth of FIB in both overlying water and sediment from all beaches, as well as results from the beach survey, support the hypothesis that the quiescent environment rather than sediment characteristics can explain the elevated sediment FIB levels observed at enclosed beaches. This work has implications for the predictive value of FIB measurements, and points to the importance of the sediment reservoir. (c) 2006 Elsevier Ltd. All rights reserved.