DOI: 10.1016/j.watres.2017.11.038
Scopus记录号: 2-s2.0-85034854353
论文题名: Spatial and temporal variability of bacterial indicators and pathogens in six California reservoirs during extreme drought
作者: Partyka M.L. ; Bond R.F. ; Chase J.A. ; Atwill E.R.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 129 起始页码: 436
结束页码: 446
语种: 英语
英文关键词: Bacteria
; Food safety
; Irrigation water
; Reservoir
; Thermal stratification
; Water quality
Scopus关键词: Bacteria
; Drought
; Escherichia coli
; Food safety
; Irrigation
; Risk perception
; Rivers
; Salmonella
; Thermal stratification
; Water pollution
; Water quality
; Water supply
; Bacterial indicators
; Fecal indicator bacteria
; Irrigation waters
; Management decisions
; Microbial contamination
; Shiga toxin-producing E. coli
; Spatial and temporal variability
; Thermally stratified
; Reservoirs (water)
; water
; bacterium
; bioindicator
; drought
; extreme event
; food safety
; irrigation system
; parasite prevalence
; pathogen
; reservoir
; sampling
; spatiotemporal analysis
; stratification
; water quality
; water temperature
; Article
; concentration (parameters)
; drought
; Escherichia coli
; Escherichia coli O157
; fecal coliform
; nonhuman
; priority journal
; Salmonella
; Shiga toxin producing Escherichia coli
; summer
; water quality
; water supply
; water temperature
; agriculture
; California
; drought
; feces
; irrigation (agriculture)
; isolation and purification
; microbiology
; water supply
; California
; Central Valley [California]
; Sierra Nevada [California]
; United States
; Bacteria (microorganisms)
; Escherichia coli
; Salmonella
; Agricultural Irrigation
; Agriculture
; California
; Droughts
; Escherichia coli O157
; Feces
; Salmonella
; Water Microbiology
; Water Quality
; Water Supply
英文摘要: California has one of the largest systems of surface water reservoirs in the world, providing irrigation water to California's agriculturally productive Central Valley. Irrigation water is recognized as a vehicle for the microbial contamination of raw produce and must be monitored according to new federal regulation. The purpose of this study was to further understanding of the variability of fecal indicator bacteria (Escherichia coli and fecal coliforms) and pathogens (E. coli O157:H7 (O157), non-O157 Shiga toxin-producing E. coli (STEC) and Salmonella) along both horizontal and vertical profiles within California reservoirs. Monthly sampling was conducted in six reservoirs located in the foothills of the Western Sierra Nevada during the summer irrigation season and extreme drought conditions of 2014 (n = 257). Concentrations of fecal indicator bacteria were highly variable between reservoirs (p < 0.05) and along the horizontal profile (p < 0.001) from upstream to downstream, with higher concentrations typically found outside of the reservoirs than within. Though many of the reservoirs were thermally stratified, bacterial concentrations were not associated with water temperature (p > 0.05) or any one particular depth strata (p < 0.05). However, prevalence of Salmonella and STEC (16/70 and 9/70 respectively) was higher in the deep strata than in mid or surface layers. We found no statistical association between samples collected downstream of reservoirs and those from the reservoirs themselves. Continued monitoring and modeling of both bacterial indicators and enteric pathogens are critical to our ability to estimate the risk of surface irrigation water supplies and make appropriate management decisions. © 2017 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/113112
Appears in Collections: 气候减缓与适应
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作者单位: Western Center for Food Safety, School of Veterinary Medicine, University of California, Davis, United States
Recommended Citation:
Partyka M.L.,Bond R.F.,Chase J.A.,et al. Spatial and temporal variability of bacterial indicators and pathogens in six California reservoirs during extreme drought[J]. Water Research,2018-01-01,129