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首页> 外文期刊>Environmental Science & Technology >Enterococci Concentrations in Diverse Coastal Environments Exhibit Extreme Variability
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Enterococci Concentrations in Diverse Coastal Environments Exhibit Extreme Variability

机译：不同沿海环境中的肠球菌浓度呈现出极大的变异性

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摘要

Fecal indicator bacteria (FIB) concentrations in a single grab sample of water are used to notify the public about the safety of swimming in coastal waters. If concentrations are over a single-sample standard, waters are closed or placed under an advisory. Previous work has shown that notification errors occur often because FIB vary more quickly than monitoring results can be obtained (typically 24 h). Rapid detection technologies (such as quantitative polymerase chain reaction) that allow FIB quantification in hours have been suggested as a solution to notification errors. In the present study, I explore variability of enterococci (ENT) over time scales less than a day that might affect interpretation of FIB concentrations from a single grab sample, even if obtained rapidly. Five new data sets of ENT collected at 10 and 1 min periodicities for 24 and 1 h, respectively, are presented. Data sets are collected in diverse marine environments from a turbulent surf zone to a quiescent bay. ENT vary with solar and tidal cycles, as has been observed in previous studies. Over short time scales, ENT are extremely variable in each environment even the quiescent bay. Changes in ENT concentrations between consecutive samples (1 or 10 min apart) greater than the single-sample standard (104 most probable number per 100 mL) are not unusual.
机译：一次采集的水样中的粪便指示剂细菌（FIB）浓度可用于告知公众在沿海水域游泳的安全性。如果浓度超过单一样品标准，则关闭水域或将其置于建议之下。先前的工作表明，通知错误经常发生，因为FIB的变化比获得监视结果的速度更快（通常为24小时）。已建议使用快速检测技术（例如定量聚合酶链式反应）在数小时内完成FIB定量，以解决通知错误。在本研究中，我探索了小于一天的时间范围内肠球菌（ENT）的变异性，这可能会影响单个抓取样品中FIB浓度的解释，即使快速获得也是如此。介绍了五个分别在10分钟和1分钟的周期分别收集24小时和1小时的ENT的新数据集。从动荡的冲浪区到平静的海湾，在各种海洋环境中收集数据集。正如先前的研究中所观察到的那样，耳鼻喉随太阳和潮汐周期的变化而变化。在较短的时间尺度上，耳鼻喉科在每个环境中甚至在静止的海湾中都变化很大。连续样品（相隔1或10分钟）之间的ENT浓度变化大于单样品标准品（每100 mL中104个最可能的数量）的变化并不罕见。

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  • 来源
    《Environmental Science & Technology》 |2007年第24期|p.8227-8232|共6页
  • 作者

    ALEXANDRIA B.BOEHM;

  • 作者单位

    Department of Civil and Environmental Engineering, Environmental and Water Studies, Stanford University, Stanford, California 94305-4020;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 环境化学;
  • 关键词

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