Evaluating the impact of hydrometeorological conditions on E. coli concentration in farmed mussels and clams: experience in Central Italy

Highly populated coastal environments receive large quantities of treated and untreated wastewater from human and industrial sources. Bivalve molluscs accumulate and retain contaminants, and their analysis provides evidence of past contamination. Rivers and precipitation are major routes of bacterio...

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Autores principales:	Valentina Colaiuda, Federica Di Giacinto, Annalina Lombardi, Carla Ippoliti, Carla Giansante, Mario Latini, Giuseppina Mascilongo, Ludovica Di Renzo, Miriam Berti, Annamaria Conte, Nicola Ferri, Marco Verdecchia, Barbara Tomassetti
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	bivalve molluscs discharge escherichia coli food security hydrological modelling precipitation Public aspects of medicine RA1-1270
Acceso en línea:	https://doaj.org/article/94f62234c26c4804884aaa1370e636a1
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spelling	oai:doaj.org-article:94f62234c26c4804884aaa1370e636a12021-11-06T06:05:21ZEvaluating the impact of hydrometeorological conditions on E. coli concentration in farmed mussels and clams: experience in Central Italy1477-89201996-782910.2166/wh.2021.203https://doaj.org/article/94f62234c26c4804884aaa1370e636a12021-06-01T00:00:00Zhttp://jwh.iwaponline.com/content/19/3/512https://doaj.org/toc/1477-8920https://doaj.org/toc/1996-7829Highly populated coastal environments receive large quantities of treated and untreated wastewater from human and industrial sources. Bivalve molluscs accumulate and retain contaminants, and their analysis provides evidence of past contamination. Rivers and precipitation are major routes of bacteriological pollution from surface or sub-surface runoff flowing into coastal areas. However, relationships between runoff, precipitation, and bacterial contamination are site-specific and dependent on the physiographical characteristics of each catchment. In this work, we evaluated the influence of precipitation and river discharge on molluscs' Escherichia coli concentrations at three sites in Central Italy, aiming at quantifying how hydrometeorological conditions affect bacteriological contamination of selected bivalve production areas. Rank-order correlation analysis indicated a stronger association between E. coli concentrations and the modelled Pescara River discharge maxima (r = 0.69) than between E. coli concentration and rainfall maxima (r = 0.35). Discharge peaks from the Pescara River caused an increase in E. coli concentration in bivalves in 87% of cases, provided that the runoff peak occurred 1–6 days prior to the sampling date. Precipitation in coastal area was linked to almost 60% of cases of E. coli high concentrations and may enhance bacterial transportation offshore, when associated with a larger-scale weather system, which causes overflow occurrence. HIGHLIGHTS Using a grid-distributed hydrological model to assess hydrometeorological conditions in the absence of direct measurements.; Analysis of a previous uninvestigated area.; New discharge threshold determining Escherichia coli concentration peaks found in Central Italy in order to allow the development of an early warning system for risk assessment.;Valentina ColaiudaFederica Di GiacintoAnnalina LombardiCarla IppolitiCarla GiansanteMario LatiniGiuseppina MascilongoLudovica Di RenzoMiriam BertiAnnamaria ConteNicola FerriMarco VerdecchiaBarbara TomassettiIWA Publishingarticlebivalve molluscsdischargeescherichia colifood securityhydrological modellingprecipitationPublic aspects of medicineRA1-1270ENJournal of Water and Health, Vol 19, Iss 3, Pp 512-533 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	bivalve molluscs discharge escherichia coli food security hydrological modelling precipitation Public aspects of medicine RA1-1270
spellingShingle	bivalve molluscs discharge escherichia coli food security hydrological modelling precipitation Public aspects of medicine RA1-1270 Valentina Colaiuda Federica Di Giacinto Annalina Lombardi Carla Ippoliti Carla Giansante Mario Latini Giuseppina Mascilongo Ludovica Di Renzo Miriam Berti Annamaria Conte Nicola Ferri Marco Verdecchia Barbara Tomassetti Evaluating the impact of hydrometeorological conditions on E. coli concentration in farmed mussels and clams: experience in Central Italy
description	Highly populated coastal environments receive large quantities of treated and untreated wastewater from human and industrial sources. Bivalve molluscs accumulate and retain contaminants, and their analysis provides evidence of past contamination. Rivers and precipitation are major routes of bacteriological pollution from surface or sub-surface runoff flowing into coastal areas. However, relationships between runoff, precipitation, and bacterial contamination are site-specific and dependent on the physiographical characteristics of each catchment. In this work, we evaluated the influence of precipitation and river discharge on molluscs' Escherichia coli concentrations at three sites in Central Italy, aiming at quantifying how hydrometeorological conditions affect bacteriological contamination of selected bivalve production areas. Rank-order correlation analysis indicated a stronger association between E. coli concentrations and the modelled Pescara River discharge maxima (r = 0.69) than between E. coli concentration and rainfall maxima (r = 0.35). Discharge peaks from the Pescara River caused an increase in E. coli concentration in bivalves in 87% of cases, provided that the runoff peak occurred 1–6 days prior to the sampling date. Precipitation in coastal area was linked to almost 60% of cases of E. coli high concentrations and may enhance bacterial transportation offshore, when associated with a larger-scale weather system, which causes overflow occurrence. HIGHLIGHTS Using a grid-distributed hydrological model to assess hydrometeorological conditions in the absence of direct measurements.; Analysis of a previous uninvestigated area.; New discharge threshold determining Escherichia coli concentration peaks found in Central Italy in order to allow the development of an early warning system for risk assessment.;
format	article
author	Valentina Colaiuda Federica Di Giacinto Annalina Lombardi Carla Ippoliti Carla Giansante Mario Latini Giuseppina Mascilongo Ludovica Di Renzo Miriam Berti Annamaria Conte Nicola Ferri Marco Verdecchia Barbara Tomassetti
author_facet	Valentina Colaiuda Federica Di Giacinto Annalina Lombardi Carla Ippoliti Carla Giansante Mario Latini Giuseppina Mascilongo Ludovica Di Renzo Miriam Berti Annamaria Conte Nicola Ferri Marco Verdecchia Barbara Tomassetti
author_sort	Valentina Colaiuda
title	Evaluating the impact of hydrometeorological conditions on E. coli concentration in farmed mussels and clams: experience in Central Italy
title_short	Evaluating the impact of hydrometeorological conditions on E. coli concentration in farmed mussels and clams: experience in Central Italy
title_full	Evaluating the impact of hydrometeorological conditions on E. coli concentration in farmed mussels and clams: experience in Central Italy
title_fullStr	Evaluating the impact of hydrometeorological conditions on E. coli concentration in farmed mussels and clams: experience in Central Italy
title_full_unstemmed	Evaluating the impact of hydrometeorological conditions on E. coli concentration in farmed mussels and clams: experience in Central Italy
title_sort	evaluating the impact of hydrometeorological conditions on e. coli concentration in farmed mussels and clams: experience in central italy
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/94f62234c26c4804884aaa1370e636a1
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Evaluating the impact of hydrometeorological conditions on E. coli concentration in farmed mussels and clams: experience in Central Italy

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