Response of coliform populations in streambed sediment and water column to changes in nutrient concentrations in water

Shelton, Daniel R.; Pachepsky, Yakov; Kiefer, L.A.; Blaustein, Ryan A.; McCarty, Greg; Dao, Thanh H.

doi:10.1016/j.watres.2014.04.019

Cited by 36 publications

(28 citation statements)

References 33 publications

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“…For ORP, the points P3, P4 and P5 were not significantly different, but they differed from points P1 and P2 when all samplings were averaged. According to Corcóvia and Celligoi (2012) and Shelton et al (2014) in their ORP analyses of different water samples, their values were close to those obtained for the last three points in this study. In addition, the external factors that contributed most to these results were environmental pollution, exhaust gases and pesticides (Corcóvia;Celligoi, 2012).…”

Section: Physical and Chemical Variables: Spatial And Temporal Variabsupporting

confidence: 88%

Freshwater quality of a stream in agricultural area where organic compost from animal and vegetable wastes is used

et al. 2017

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Organic compost from biomass residues constitutes a viable alternative for partial or total replacement of mineral fertilizers for growing vegetables. This study evaluated the effects of compost on the water quality of a stream used mainly for irrigation of agricultural crops cultivated in nearby soil that has been treated with organic compost produced by carcasses, animal and vegetable waste for the last ten years. We sampled water biannually for two years, 2013 and 2014, from five locations along the stream. Physical variables and some chemical variables were analyzed. We also analyzed the total number of coliforms (Escherichia coli). Bacterial populations were compared by carbon substrate consumption. Total phosphorus contents in the samples from 2014 exceeded 0.1 mg L -1. The concentrations of other chemical species analyzed and the results for the physical variables were in accordance with the expected values compared with national and international water quality standards. The environment showed differential carbon source consumption and a high diversity of microorganisms, but our results did not show any evidence that the applied compost is changing the microbial population or its metabolic activity. This study shows that the use of the organic compost in agricultural areas seen does not negatively influence the quality of surface water in the study area. These results are important because the process of composting animal and vegetable waste and the use of compost obtained can be an alternative sustainable for adequate destination of these wastes.Index terms: EcoPlate; carcasses and animal waste; agriculture; surface water; composting. RESUMOComposto orgânico produzido a partir de biomassa residual constitui uma alternativa viável para a substituição parcial ou total de fertilizantes minerais no cultivo de hortaliças. Neste estudo foram avaliados os efeitos do composto, sobre a qualidade da água de um córrego, usado principalmente para a irrigação de culturas agrícolas cultivadas em solo nas proximidades, tratado nos últimos dez anos com composto orgânico produzido a partir de carcaças, resíduos animais e vegetais. Amostras de água foram coletadas semestralmente, em 2013 e 2014, em cinco pontos ao longo do córrego. Foram analisadas variáveis físicas, algumas variáveis químicas e o número total de coliformes (Escherichia coli). As populações bacterianas foram comparadas pelo consumo de substratos de carbono. Os teores de fósforo total nas amostras de 2014 ultrapassaram 0,1 mg L -1 . As concentrações das demais espécies químicas analisadas e os resultados para as variáveis fisicas ficaram de acordo com valores estabelecidos em normas nacionais e internacionais de qualidade de água. O ambiente mostrou consumo diferencial de fontes de carbono e grande diversidade de micro-organismos, mas os resultados não mostraram qualquer evidência de que o composto aplicado seja o fator responsável pela alteração da população microbiana ou sua atividade metabólica. Este estudo mostra que o uso do composto orgânico...

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Section: Physical and Chemical Variables: Spatial And Temporal Variabsupporting

confidence: 88%

Freshwater quality of a stream in agricultural area where organic compost from animal and vegetable wastes is used

et al. 2017

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“…However, the viability, persistence and metabolic activity within or between indicator species is not constant in the environment (Anderson et al, 2005). For example, the metabolic activity of a bioluminescent strain of E. coli O157:H7 decreased due to exposure to salt water, whilst elevated nutrients boosted its microbial activity (Williams et al, 2007) possibly resulting in growth (Shelton et al, 2014) or reduction in inactivation (Garzio-Hadzick et al, 2010). In most fresh and marine waters, metabolic activity rapidly declines after release from feces, which may result from insufficient carbon source or absence of host factors (Thorn et al, 2011; Li et al, 2014).…”

Section: Sediment Characteristics Governing Bacteria Particle Interacmentioning

confidence: 99%

“…However, in freshwater systems, the number of E. coli released in successive events are limited to the deposited/proliferated bacteria between events (Shelton et al, 2014) and the sediment depth which is subject to scour (Harvey et al, 2012). The bacterial abundance increases in the water column on the rising curve of the storm hydrograph, due to particulate resuspension under periods of high turbulence (Howlett et al, 2015) often with a delay between the peak in riverflow and the peak in bacterial abundance (Jamieson R. C. et al, 2005; Jamieson R. et al, 2005; Henson et al, 2007).…”

Section: Sediments As a Sink/source Of Fecal Bacteria And Viruses?mentioning

confidence: 99%

Abundance and Distribution of Enteric Bacteria and Viruses in Coastal and Estuarine Sediments—a Review

et al. 2016

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The long term survival of fecal indicator organisms (FIOs) and human pathogenic microorganisms in sediments is important from a water quality, human health and ecological perspective. Typically, both bacteria and viruses strongly associate with particulate matter present in freshwater, estuarine and marine environments. This association tends to be stronger in finer textured sediments and is strongly influenced by the type and quantity of clay minerals and organic matter present. Binding to particle surfaces promotes the persistence of bacteria in the environment by offering physical and chemical protection from biotic and abiotic stresses. How bacterial and viral viability and pathogenicity is influenced by surface attachment requires further study. Typically, long-term association with surfaces including sediments induces bacteria to enter a viable-but-non-culturable (VBNC) state. Inherent methodological challenges of quantifying VBNC bacteria may lead to the frequent under-reporting of their abundance in sediments. The implications of this in a quantitative risk assessment context remain unclear. Similarly, sediments can harbor significant amounts of enteric viruses, however, the factors regulating their persistence remains poorly understood. Quantification of viruses in sediment remains problematic due to our poor ability to recover intact viral particles from sediment surfaces (typically <10%), our inability to distinguish between infective and damaged (non-infective) viral particles, aggregation of viral particles, and inhibition during qPCR. This suggests that the true viral titre in sediments may be being vastly underestimated. In turn, this is limiting our ability to understand the fate and transport of viruses in sediments. Model systems (e.g., human cell culture) are also lacking for some key viruses, preventing our ability to evaluate the infectivity of viruses recovered from sediments (e.g., norovirus). The release of particle-bound bacteria and viruses into the water column during sediment resuspension also represents a risk to water quality. In conclusion, our poor process level understanding of viral/bacterial-sediment interactions combined with methodological challenges is limiting the accurate source apportionment and quantitative microbial risk assessment for pathogenic organisms associated with sediments in aquatic environments.

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“…Many prior studies that evaluated FIB data focused solely on individual beaches or small clusters of beaches. They have focused on evaluating measureable water quality and parameters such as temperature (Leight et al 2016), rainfall (Farnham and Lall 2015), nutrient availability (Shelton et al 2014), hydrodynamics (Feng et al, 2013, He et al, 2007, Ge et al 2012, Rodrigues et al 2016), and sediment (Solo-Gabriele et al 2000, Desmarais et al 2002, Frey et al 2015). Some have been more comprehensive in evaluating beach water quality for the states of California (Dorsey 2010, Yamahara et al 2007) and Florida (Feng et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Significance of beach geomorphology on fecal indicator bacteria levels

Donahue

Feng

Kelly

et al. 2017

Marine Pollution Bulletin

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Large databases of fecal indicator bacteria (FIB) measurements are available for coastal waters. With the assistance of satellite imagery, we illustrated the power of assessing data for many sites by evaluating beach features such as geomorphology, distance from rivers and canals, presence of piers and causeways, and degree of urbanization coupled with the enterococci FIB database for the state of Florida. We found that beach geomorphology was the primary characteristic associated with enterococci levels that exceeded regulatory guidelines. Beaches in close proximity to marshes or within bays had higher enterococci exceedances in comparison to open coast beaches. For open coast beaches, greater enterococci exceedances were associated with nearby rivers and higher levels of urbanization. Piers and causeways had a minimal contribution, as their effect was often overwhelmed by beach geomorphology. Results can be used to understand the potential causes of elevated enterococci levels and to promote public health.

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Response of coliform populations in streambed sediment and water column to changes in nutrient concentrations in water

Cited by 36 publications

References 33 publications

Freshwater quality of a stream in agricultural area where organic compost from animal and vegetable wastes is used

Freshwater quality of a stream in agricultural area where organic compost from animal and vegetable wastes is used

Abundance and Distribution of Enteric Bacteria and Viruses in Coastal and Estuarine Sediments—a Review

Significance of beach geomorphology on fecal indicator bacteria levels

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