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Decay of Coliphages in Sewage-Contaminated Freshwater: Uncertainty and Seasonal Effects

机译：污水污染的淡水中鹅卵石的腐烂：不确定性和季节性影响

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摘要

Understanding the fete of enteric viruses in water is vital for protection of water quality. However, the decay of enteric viruses is not well characterized, and its uncertainty has not been examined yet. In this study, the decay of coliphages, an indicator for enteric viruses, was investigated in situ under both sunlit and shaded conditions as well as in summer and winter. The decay rates of coliphages and their uncertainties were analyzed using a Bayesian approach. The results from the summer experiments revealed that the decay rates of somatic coliphages were significantly higher in sunlight (1.29 ± 0.06 day~(-1)) than in shade (0.96 ± 0.04 day~(-1)), but the decay rates of male-specific (F+) coliphages were not significantly different between sunlight (1.09 ± 0.09 day~(-1)) and shaded treatments (1.11 ± 0.08 day~(-1)). The decay rates of both F+ coliphages (0.25 ± 0.02 day~(-1)) and somatic coliphages (0.12 ± 0.01 day~(-1)) in winter were considerably lower than those in summer. Temperature and chlorophyll a (chla) concentration varied significantly (p ＜ 0.001) between the two seasons, suggesting that these parameters might be important contributors to the seasonal variation of coliphage decay. Additionally, the Bayesian approach provided full distributions of decay rates and reduced the uncertainty, offering useful information for comparing decay rates under different conditions.
机译：了解水中肠道病毒的种类对于保护水质至关重要。但是，肠病毒的腐烂尚未得到很好的表征，其不确定性尚未得到检验。在这项研究中，在阳光和阴暗条件下以及夏季和冬季均对原肠细菌病毒指示剂大肠杆菌噬菌体的腐烂进行了研究。使用贝叶斯方法分析了噬菌体的衰减率及其不确定性。夏季实验的结果表明，在阳光下（1.29±0.06 day〜（-1）），体细胞噬菌体的腐烂率显着高于在阴凉处（0.96±0.04 day〜（-1）），但是腐殖质的腐烂率却更高。在阳光下（1.09±0.09天〜（-1））和阴暗处理（1.11±0.08天〜（-1））之间，男性特异性（F +）噬菌体无显着差异。冬季，F +噬菌体（0.25±0.02天〜（-1））和体细胞噬菌体（0.12±0.01天〜（-1））的腐烂率均大大低于夏季。在两个季节之间，温度和叶绿素a（chla）浓度变化显着（p ＜0.001），这表明这些参数可能是导致噬菌体腐烂季节变化的重要因素。另外，贝叶斯方法提供了衰减率的完整分布并减少了不确定性，为比较不同条件下的衰减率提供了有用的信息。

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  • 来源
    《Environmental Science & Technology》 |2016年第21期|11593-11601|共9页
  • 作者

    Jianyong Wu; Yiping Cao; Brianna Young; Yvonne Yuen; Sharon Jiang; Daira Melendez; John F. Griffith; Jill R. Steward;

  • 作者单位

    Department of Environmental Sdences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States;

    Southern California Coastal Water Research Project Authority, Costa Mesa, California 92626, United States;

    Department of Environmental Sdences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States;

    Department of Environmental Sdences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States;

    Department of Environmental Sdences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States;

    Department of Environmental Sdences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States;

    Southern California Coastal Water Research Project Authority, Costa Mesa, California 92626, United States;

    Department of Environmental Sdences and Engineering, Gillings School of Global Public Health, The University of North Carolina at Chapel Hill, Chapel Hill, North Carolina 27599, United States;

  • 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);
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