PMID- 26921850 OWN - NLM STAT- MEDLINE DCOM- 20161213 LR - 20191210 IS - 1879-2448 (Electronic) IS - 0043-1354 (Linking) VI - 93 DP - 2016 Apr 15 TI - Into the deep: Evaluation of SourceTracker for assessment of faecal contamination of coastal waters. PG - 242-253 LID - S0043-1354(16)30088-4 [pii] LID - 10.1016/j.watres.2016.02.029 [doi] AB - Faecal contamination of recreational waters is an increasing global health concern. Tracing the source of the contaminant is a vital step towards mitigation and disease prevention. Total 16S rRNA amplicon data for a specific environment (faeces, water, soil) and computational tools such as the Markov-Chain Monte Carlo based SourceTracker can be applied to microbial source tracking (MST) and attribution studies. The current study applied artificial and in-laboratory derived bacterial communities to define the potential and limitations associated with the use of SourceTracker, prior to its application for faecal source tracking at three recreational beaches near Port Phillip Bay (Victoria, Australia). The results demonstrated that at minimum multiple model runs of the SourceTracker modelling tool (i.e. technical replicates) were required to identify potential false positive predictions. The calculation of relative standard deviations (RSDs) for each attributed source improved overall predictive confidence in the results. In general, default parameter settings provided high sensitivity, specificity, accuracy and precision. Application of SourceTracker to recreational beach samples identified treated effluent as major source of human-derived faecal contamination, present in 69% of samples. Site-specific sources, such as raw sewage, stormwater and bacterial populations associated with the Yarra River estuary were also identified. Rainfall and associated sand resuspension at each location correlated with observed human faecal indicators. The results of the optimised SourceTracker analysis suggests that local sources of contamination have the greatest effect on recreational coastal water quality. CI - Copyright (c) 2016 Elsevier Ltd. All rights reserved. FAU - Henry, Rebekah AU - Henry R AD - Environmental and Public Health Microbiology Laboratory (EPHM Lab), Department of Civil Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia. FAU - Schang, Christelle AU - Schang C AD - Environmental and Public Health Microbiology Laboratory (EPHM Lab), Department of Civil Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia. FAU - Coutts, Scott AU - Coutts S AD - Micromon, Dept. of Microbiology, Monash University, Wellington Road, Clayton 3800, Victoria, Australia. FAU - Kolotelo, Peter AU - Kolotelo P AD - Environmental and Public Health Microbiology Laboratory (EPHM Lab), Department of Civil Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia. FAU - Prosser, Toby AU - Prosser T AD - Melbourne Water, Latrobe St, Docklands 3008, Victoria, Australia. FAU - Crosbie, Nick AU - Crosbie N AD - Melbourne Water, Latrobe St, Docklands 3008, Victoria, Australia. FAU - Grant, Trish AU - Grant T AD - Melbourne Water, Latrobe St, Docklands 3008, Victoria, Australia. FAU - Cottam, Darren AU - Cottam D AD - Environment Protection Authority, 200 Victoria Street, Carlton 3053, Victoria, Australia. FAU - O'Brien, Peter AU - O'Brien P AD - Mornington Shire Council, 2 Queen Street, Mornington 3931, Victoria, Australia. FAU - Deletic, Ana AU - Deletic A AD - Environmental and Public Health Microbiology Laboratory (EPHM Lab), Department of Civil Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia. FAU - McCarthy, David AU - McCarthy D AD - Environmental and Public Health Microbiology Laboratory (EPHM Lab), Department of Civil Engineering, Monash University, Wellington Road, Clayton 3800, Victoria, Australia. Electronic address: david.mccarthy@monash.edu. LA - eng PT - Evaluation Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160217 PL - England TA - Water Res JT - Water research JID - 0105072 RN - 0 (RNA, Ribosomal, 16S) RN - 0 (Sewage) SB - IM MH - Bacteria/classification/genetics MH - Bathing Beaches MH - Bays/microbiology MH - Computational Biology/*methods MH - Environmental Monitoring/methods MH - Estuaries MH - Feces/*microbiology MH - Geography MH - Humans MH - RNA, Ribosomal, 16S/genetics MH - Recreation MH - Reproducibility of Results MH - Risk Assessment/*methods MH - Risk Factors MH - Rivers/microbiology MH - Sewage/microbiology MH - *Soil Microbiology MH - Victoria MH - *Water Microbiology OTO - NOTNLM OT - 16S rRNA amplicon OT - Bacterial communities OT - Coastal waters OT - Faecal contamination OT - Microbial source tracking OT - SourceTracker EDAT- 2016/02/28 06:00 MHDA- 2016/12/15 06:00 CRDT- 2016/02/28 06:00 PHST- 2015/10/07 00:00 [received] PHST- 2016/01/25 00:00 [revised] PHST- 2016/02/12 00:00 [accepted] PHST- 2016/02/28 06:00 [entrez] PHST- 2016/02/28 06:00 [pubmed] PHST- 2016/12/15 06:00 [medline] AID - S0043-1354(16)30088-4 [pii] AID - 10.1016/j.watres.2016.02.029 [doi] PST - ppublish SO - Water Res. 2016 Apr 15;93:242-253. doi: 10.1016/j.watres.2016.02.029. Epub 2016 Feb 17.