The occurrence of PAHs and faecal sterols in Dublin Bay and their influence on sedimentary microbial communities

Murphy, Brian T.; O’Reilly, Shane S.; Monteys, Xavier; Reid, Barry F.; Szpak, Michal; McCaul, Margaret; Jordan, Sean; Allen, Christopher C. R.; Kelleher, Brian P.

doi:10.1016/j.marpolbul.2016.02.066

Cited by 18 publications

(10 citation statements)

References 57 publications

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“…Fecal waste is a common pollutant in coastal marine environments ( 1 ). Previous studies have shown that fecal pollution can increase the prevalence of human enteric pathogens (e.g., Clostridium perfringens , enteroviruses, hepatitis A viruses, Norwalk viruses, and adenoviruses) ( 2 , 3 ) and fundamentally alter the microbial community composition in aquatic environments ( 4 , 5 ). The occurrence of fecal pollution poses a serious threat to human and environmental health, as the increased prevalence of these pathogens has long been correlated with an increased risk of illness in humans and marine life ( 2 , 6 ).…”

Section: Introductionmentioning

confidence: 99%

Relationship between Rainfall, Fecal Pollution, Antimicrobial Resistance, and Microbial Diversity in an Urbanized Subtropical Bay

Powers

Wallgren

Marbach

et al. 2020

Appl Environ Microbiol

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Urbanized bays are vulnerable to fecal bacterial pollution and the extent of this pollution, in marine recreational waters, is commonly assessed by quantifying enterococci concentrations. Recent reports have questioned the utility of enterococci as an indicator of fecal bacterial pollution in subtropical bays impaired by non-point source pollution, and enterococci data alone cannot identify fecal bacterial sources (i.e., hosts). The purpose of this study was to assess relationships between rainfall, fecal bacterial pollution, antimicrobial resistance, and microbial diversity in an urbanized subtropical bay. Thus, a comprehensive bacterial source tracking (BST) study was conducted using a combination of traditional and modern BST methodologies. Findings show that rainfall was directly correlated with elevated enterococci concentrations, including the increased prevalence of Enterococcus faecium, although it was not correlated with an increase in the prevalence of antimicrobial-resistant strains. Rainfall was also correlated with decreased microbial diversity. By contrast, neither rainfall nor enterococci concentrations were directly correlated with the concentrations of three omnipresent host-associated fecal markers (i.e., human, canine, and gull). Notably, the human fecal marker (HF183) was inversely correlated with enterococci concentrations, signifying that traditional enterococci data alone is not an accurate proxy for human fecal waste in urbanized subtropical bays. IMPORTANCE The presence of human enteric pathogens, stemming from fecal pollution, is a serious environmental and public health concern in recreational waters. Accurate assessments of fecal pollution are therefore needed to properly assess exposure risks and guide water quality policies and practices. In this study, the absence of a direct correlation between enterococci and source-specific human and animal markers disputes the utility of enterococci as an indicator of fecal pollution. Moreover, the inverse correlation between enterococci and the human-specific HF183 marker indicates that recreational beach advisories, triggered by elevated enterococci concentrations, are a misleading and ineffective practice. This study clearly demonstrates that a multiparameter approach that includes the quantitation of host-specific markers, as well as analyses of microbial diversity, is a more effective means of assessing water quality in urbanized subtropical bays.

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Section: Introductionmentioning

confidence: 99%

Relationship between Rainfall, Fecal Pollution, Antimicrobial Resistance, and Microbial Diversity in an Urbanized Subtropical Bay

Powers

Wallgren

Marbach

et al. 2020

Appl Environ Microbiol

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“…tools recently proposed by Sinninghe Damsté (2016) and Xiao et al (2016) were developed in the oceanic realm and their applicability in lakes has yet to be tested. Many studies have demonstrated the impact of human activities on bacterial and phytoplanktonic communities (e.g., Moon et al, 2016;Murphy et al, 2016;Lambert et al, 2018), but fewer studies have considered the potential direct and indirect impacts of human occupation and activities on GDGT distributions (Das et al, 2012;Naeher et al, 2014;dos Santos and Vane, 2016;Chen et al, 2018;Song et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Impact of human activities and vegetation changes on the tetraether sources in Lake St Front (Massif Central, France)

Martin

Ménot

Thouveny

et al. 2019

Organic Geochemistry

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The distribution of branched glycerol dialkyl glycerol tetraethers (brGDGTs) has been shown to correlate with mean annual air temperature and is increasingly used for paleoclimate reconstructions, in particular in lakes. Numerous studies have reported in situ production of brGDGTs in lakes. These brGDGTs have different distributions compared with those produced in soils and their mixing hampers paleoclimate reconstructions. Very few tools exist to determine brGDGT sources in the present and to trace their changes in the past linked with environmental changes of climatic or anthropogenic origin. While human activities are known to affect both soil and aquatic ecosystems, particularly bacterial communities, the specific impacts on brGDGT distributions are poorly investigated. High resolution analyses of brGDGTs were carried out on Holocene sediments and catchment soils of Lake St Front (Massif Central, France) in association with sedimentological, palynological, and geochemical analyses. Comparison of brGDGT distributions in sediments and soils revealed their mixed origin. For the first time, we tested the reliability of the RIIIa/RIIa ratio in lakes which indicated a gradual shift from aquatic to terrigenous brGDGT sources over the Holocene. This shift was supported by sedimentological and geochemical indices. Three events with a high proportion of terrigenous brGDGTs (6-5.5, 2.8-2.5, and 2-0.2 kyr cal BP) coincide with changes in vegetation in the catchment area, driven by climate and/or human activities. This suggests that vegetation modifications in the watershed impact brGDGT distributions and may thus bias brGDGT-based paleoclimatic reconstructions.

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“…Pela sua relevância no monitoramento desta fonte de contaminação dos ecossistemas aquáticos, novas abordagens podem ser exploradas, uma vez que esta também é a rota para inserção de inúmeros contaminantes emergentes. Dessa forma a mensuração dos esteróis fecais também pode indicar de modo relativo à dispersão de micropoluentes como os fármacos (MURPHY et al, 2016).…”

Section: Esteróisunclassified

“…Os Hidrocarbonetos poliaromáticos (HPAs) estão inclusos em uma categoria de compostos denominados poluentes orgânicos persistentes (POPs). Por apresentarem tendências mutagênicas e carcinogênicas têm impacto no meio ambiente e por isso são utilizados no monitoramento em compartimentos e organismos (MCCREADY et al, 2000;MURPHY et al, 2016).…”

Section: Hidrocarbonetos Poliaromáticos (Hpas)unclassified

Reaproveitamento Das Cascas De Banana, Limão E Laranja Na Preparação De Panquecas

Silva¹,

Souza²,

Leite³

2021

Química: Debate Entre a Vida Moderna E O Meio Ambiente

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Direitos para esta edição cedidos à Atena Editora pelos autores. Todo o conteúdo deste livro está licenciado sob uma Licença de Atribuição Creative Commons. Atribuição-Não-Comercial-NãoDerivativos 4.0 Internacional (CC BY-NC-ND 4.0).O conteúdo dos artigos e seus dados em sua forma, correção e confiabilidade são de responsabilidade exclusiva dos autores, inclusive não representam necessariamente a posição oficial da Atena Editora. Permitido o download da obra e o compartilhamento desde que sejam atribuídos créditos aos autores, mas sem a possibilidade de alterá-la de nenhuma forma ou utilizá-la para fins comerciais. Todos os manuscritos foram previamente submetidos à avaliação cega pelos pares, membros do Conselho Editorial desta Editora, tendo sido aprovados para a publicação com base em critérios de neutralidade e imparcialidade acadêmica.A Atena Editora é comprometida em garantir a integridade editorial em todas as etapas do processo de publicação, evitando plágio, dados ou resultados fraudulentos e impedindo que interesses financeiros comprometam os padrões éticos da publicação. Situações suspeitas de má conduta científica serão investigadas sob o mais alto padrão de rigor acadêmico e ético.

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The occurrence of PAHs and faecal sterols in Dublin Bay and their influence on sedimentary microbial communities

Cited by 18 publications

References 57 publications

Relationship between Rainfall, Fecal Pollution, Antimicrobial Resistance, and Microbial Diversity in an Urbanized Subtropical Bay

Relationship between Rainfall, Fecal Pollution, Antimicrobial Resistance, and Microbial Diversity in an Urbanized Subtropical Bay

Impact of human activities and vegetation changes on the tetraether sources in Lake St Front (Massif Central, France)

Reaproveitamento Das Cascas De Banana, Limão E Laranja Na Preparação De Panquecas

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