Inicio  /  Water Research  /  Vol: 94 Par: 0 (2016)  /  Artículo
ARTÍCULO
TITULO

Contribution of hydrological data to the understanding of the spatio-temporal dynamics of F-specific RNA bacteriophages in river water during rainfall-runoff events

Blandine Fauvel    
Henry-Michel Cauchie    
Christophe Gantzer    
Leslie Ogorzaly    

Resumen

Heavy rainfall events were previously reported to bring large amounts of microorganisms in surface water, including viruses. However, little information is available on the origin and transport of viral particles in water during such rain events. In this study, an integrative approach combining microbiological and hydrological measurements was investigated to appreciate the dynamics and origins of F-specific RNA bacteriophage fluxes during two distinct rainfall-runoff events. A high frequency sampling (automatic sampler) was set up to monitor the F-specific RNA bacteriophages fluxes at a fine temporal scale during the whole course of the rainfall-runoff events. A total of 276 rainfall-runoff samples were collected and analysed using both infectivity and RT-qPCR assays. The results highlight an increase of 2.5 log10 and 1.8 log10 of infectious F-specific RNA bacteriophage fluxes in parallel of an increase of the water flow levels for both events. Faecal pollution was characterised as being mainly from anthropic origin with a significant flux of phage particles belonging to the genogroup II. At the temporal scale, two successive distinct waves of phage pollution were established and identified through the hydrological measurements. The first arrival of phages in the water column was likely to be linked to the resuspension of riverbed sediments that was responsible for a high input of genogroup II. Surface runoff contributed further to the second input of phages, and more particularly of genogroup I. In addition, an important contribution of infectious phage particles has been highlighted. These findings imply the existence of a close relationship between the risk for human health and the viral contamination of flood water.

 Artículos similares

       
 
Hussein A. Mohasseb, Wenbin Shen, Jiashuang Jiao and Qiwen Wu    
The Gravity Recovery and Climate Experiment (GRACE) provided valuable insights into variations in Groundwater Storage (GWS). However, the sensitivity of utilizing Global Positioning System (GPS) time series displacement data for detecting changes in GWS ... ver más
Revista: Water

 
Guangdong Wu, Yuanqing Liu, Bo Liu, Huazhun Ren, Wenpeng Wang, Xiao Zhang, Zhe Yuan and Mingzhi Yang    
The Hanjiang River, as a water donor basin, plays a fundamental role in supporting water supply security in northern China while maintaining the health and stability of ecosystems within the basin. However, the combined influence of climate change and an... ver más
Revista: Water

 
Ke Jin, Qianzhu Zhang, Jiang Yu, Yang Lu, Huoming Zhou, Dan Wan, Cha Zhao and Yue Hu    
The water-level fluctuation zone of the lower Jinsha River Basin is a fragile ecosystem with limited water resources in the southwest of China. Soil water is critical for maintaining ecological balance and promoting the healthy development of animals and... ver más
Revista: Water

 
Jiaxing Xu, Hongxiang Fan, Minghan Luo, Piji Li, Taeseop Jeong and Ligang Xu    
Water level is an important indicator of lake hydrology characteristics, and its fluctuation significantly affects lake ecosystems. In recent years, deep learning models have shown their superiority in the long-time range prediction of hydrology processe... ver más
Revista: Water

 
Kun Hou, Jiping Wang and Xiuru Wang    
The ecological restoration projects in the Loess Plateau (LP) has significantly altered the underlying surface conditions, coupled with a warming?wetting climate, which has profoundly affected the regional water cycle. Evaluating the response of runoff t... ver más
Revista: Water