Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/22038
Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: Impact of low intensity summer rainfall on E. coli-discharge event dynamics with reference to sample acquisition and storage
Authors: Oliver, David
Porter, Kenneth
Heathwaite, A Louise
Zhang, Ting
Quilliam, Richard
Contact Email: david.oliver@stir.ac.uk
Keywords: Autosampler
Climate change
Diffuse pollution
Faecal indicator organism
Stormevent
Water quality
Issue Date: Jun-2015
Publisher: Springer
Citation: Oliver D, Porter K, Heathwaite AL, Zhang T & Quilliam R (2015) Impact of low intensity summer rainfall on E. coli-discharge event dynamics with reference to sample acquisition and storage, Environmental Monitoring and Assessment, 187 (7), Art. No.: 426.
Abstract: Understanding the role of different rainfall scenarios on faecal indicator organism (FIO) dynamics under variable field conditions is important to strengthen the evidence base on which regulators and land managers can base informed decisions regarding diffuse microbial pollution risks. We sought to investigate the impact of low intensity summer rainfall on Escherichia coli-discharge (Q) patterns at the headwater catchment scale in order to provide new empirical data on FIO concentrations observed during baseflow conditions. In addition, we evaluated the potential impact of using automatic samplers to collect and store freshwater samples for subsequent microbial analysis during summer storm sampling campaigns. The temporal variation of E. coli concentrations with Q was captured during six events throughout a relatively dry summer in central Scotland. The relationship between E. coli concentration and Q was complex with no discernible patterns of cell emergence with Q that were repeated across all events. On several occasions, an order of magnitude increase in E. coli concentrations occurred even with slight increases in Q, but responses were not consistent and highlighted the challenges of attempting to characterise temporal responses of E. coli concentrations relative to Q during low intensity rainfall. Crosscomparison of E. coli concentrations determined in water samples using simultaneous manual grab and automated sample collection was undertaken with no difference in concentrations observed between methods. However, the duration of sample storage within the autosampler unit was found to be more problematic in terms of impacting on the representativeness of microbial water quality, with unrefrigerated autosamplers exhibiting significantly different concentrations of E. coli relative to initial samples after 12-h storage. The findings from this study provide important empirical contributions to the growing evidence base in the field of catchment microbial dynamics.
Type: Journal Article
URI: http://hdl.handle.net/1893/22038
DOI Link: http://dx.doi.org/10.1007/s10661-015-4628-x
Rights: This item has been embargoed for a period. During the embargo please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study. Publisher policy allows this work to be made available in this repository; The final publication is available at Springer via http://dx.doi.org/10.1007/s10661-015-4628-x
Affiliation: Biological and Environmental Sciences
University of Stirling
Lancaster University
Lancaster University
Biological and Environmental Sciences

Files in This Item:
File Description SizeFormat 
Oliver et al_ EMAS_120515.pdf599.95 kBAdobe PDFView/Open


This item is protected by original copyright



Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact library@stir.ac.uk providing details and we will remove the Work from public display in STORRE and investigate your claim.