Release of Escherichia coli from the bottom sediment in a first-order creek: Experiment and reach-specific modeling

Cho, Kyung Hwa; Pachepsky, Yakov; Kim, Joon Ha; Guber, Andrey; Shelton, Daniel R.; Rowland, Ryan C.

doi:10.1016/j.jhydrol.2010.07.033

Cited by 102 publications

(89 citation statements)

References 53 publications

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“…S3 in the supplemental material). Amount of rainfall has been shown to significantly correlate with bacterial influx (54)(55)(56), and greater bacterial abundance is related to extent of rainfall due to possible sediment resuspension (36). The presence of unique taxa was highest during the rising limb of the hydrograph (day 1 samples) and decreased after the storm (Fig.…”

Section: Discussionmentioning

confidence: 97%

Restructuring of the Aquatic Bacterial Community by Hydric Dynamics Associated with Superstorm Sandy

Ulrich

Rosenberger

Brislawn

et al. 2016

Appl Environ Microbiol

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Bacterial community composition and longitudinal fluctuations were monitored in a riverine system during and after Superstorm Sandy to better characterize inter-and intracommunity responses associated with the disturbance associated with a 100-year storm event. High-throughput sequencing of the 16S rRNA gene was used to assess microbial community structure within water samples from Muddy Creek Run, a second-order stream in Huntingdon, PA, at 12 different time points during the storm event (29 October to 3 November 2012) and under seasonally matched baseline conditions. High-throughput sequencing of the 16S rRNA gene was used to track changes in bacterial community structure and divergence during and after Superstorm Sandy. Bacterial community dynamics were correlated to measured physicochemical parameters and fecal indicator bacteria (FIB) concentrations. Bioinformatics analyses of 2.1 million 16S rRNA gene sequences revealed a significant increase in bacterial diversity in samples taken during peak discharge of the storm. Beta-diversity analyses revealed longitudinal shifts in the bacterial community structure. Successional changes were observed, in which Betaproteobacteria and Gammaproteobacteria decreased in 16S rRNA gene relative abundance, while the relative abundance of members of the Firmicutes increased. Furthermore, 16S rRNA gene sequences matching pathogenic bacteria, including strains of Legionella, Campylobacter, Arcobacter, and Helicobacter, as well as bacteria of fecal origin (e.g., Bacteroides), exhibited an increase in abundance after peak discharge of the storm. This study revealed a significant restructuring of in-stream bacterial community structure associated with hydric dynamics of a storm event. IMPORTANCEIn order to better understand the microbial risks associated with freshwater environments during a storm event, a more comprehensive understanding of the variations in aquatic bacterial diversity is warranted. This study investigated the bacterial communities during and after Superstorm Sandy to provide fine time point resolution of dynamic changes in bacterial composition. This study adds to the current literature by revealing the variation in bacterial community structure during the course of a storm. This study employed high-throughput DNA sequencing, which generated a deep analysis of inter-and intracommunity responses during a significant storm event. This study has highlighted the utility of applying high-throughput sequencing for water quality monitoring purposes, as this approach enabled a more comprehensive investigation of the bacterial community structure. Altogether, these data suggest a drastic restructuring of the stream bacterial community during a storm event and highlight the potential of high-throughput sequencing approaches for assessing the microbiological quality of our environment. M ore than 12,000 water bodies in the United States are considered to be impaired by fecal indicator bacteria (FIB), due to both point and nonpoint sources of pollution, according t...

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Section: Discussionmentioning

confidence: 97%

Restructuring of the Aquatic Bacterial Community by Hydric Dynamics Associated with Superstorm Sandy

Ulrich

Rosenberger

Brislawn

et al. 2016

Appl Environ Microbiol

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“…The difference between the average clay contents in the two reaches was not significant. Variations in sediment particle size along the creek are at least partially attributable to the channel slope of the creek [20]. The relative contents of silt were greatest in sites where the channel slope was the lowest.…”

Section: Sediment Compositionmentioning

confidence: 98%

“…The site contains a small first-order creek (the Beaver Dam Creek Tributary described in detail by Angier et al, 2005) of ~1100 m length that is instrumented with four stations for monitoring stream flow and water sampling. The creek bed is from 100 to 160 cm wide and the bed slope varies along the creek from 0.0008 to 0.0122 [20] (Cho et al, 2010). The creek runs within a riparian corridor of variable width from about 65 m at its narrowest point, to more than 100 m. …”

Section: Description Of Study Areamentioning

confidence: 99%

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Transport of Conservative and “Smart” Tracers in a First-Order Creek: Role of Transient Storage Type

Yakirevich

Shelton

Hill

et al. 2017

Water

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Using "smart" tracers such as Resazurin (Raz) allows assessment of sediment-water interactions and associated biological activity in streams. We compared two approaches to simulate the effects of transient storage (TS) on the transport of conservative and reactive tracers. The first approach considered TS as composed of metabolically active and metabolically inactive compartments, while the second model approach accounted for the surface transient storage (STS) and hyporheic transient storage (HTS). Experimental data were collected at a perennial first-order creek in Maryland, MD, USA, by injecting the conservative tracer bromide (Br) and the reactive (Raz) tracer and sampling water at two weir stations. The STS-HTS approach led to a more accurate simulation of Br transport and tails of the Raz and its product Rezorufin (Rru) breakthrough curves. Sediments support large microbial communities, and the STS-HTS model in creeks provides additional parameters to characterize the habitats of microbial water-quality indicator organisms.

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“…More complex cases can be deduced as combinations of these fundamental scenarios. The numerical simulation, to be presented here, is also unique in modeling a hydrodynamic system that is significantly more complex than rivers or streams (Steets and Holden 2003;Bai and Lung 2005;Cho et al 2010) and open coastal waters (Liu et al 2006;Thupaki et al 2010).…”

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confidence: 99%

Nearshore hydrodynamics as loading and forcing factors for Escherichia coli contamination at an embayed beach

Whitman

Nevers

et al. 2012

Limnology & Oceanography

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Numerical simulations of the transport and fate of Escherichia coli were conducted at Chicago's 63rd Street Beach, an embayed beach that had the highest mean E. coli concentration among 23 similar Lake Michigan beaches during summer months of [2000][2001][2002][2003][2004][2005], in order to find the cause for the high bacterial contamination. The numerical model was based on the transport of E. coli by current circulation patterns in the embayment driven by longshore main currents and the loss of E. coli in the water column, taking settling as well as bacterial dark-and solar-related decay into account. Two E. coli loading scenarios were considered: one from the open boundary north of the embayment and the other from the shallow water near the beachfront. Simulations showed that the embayed beach behaves as a sink for E. coli in that it generally receives E. coli more efficiently than it releases them. This is a result of the significantly different hydrodynamic forcing factors between the inside of the embayment and the main coastal flow outside. The settled E. coli inside the embayment can be a potential source of contamination during subsequent sediment resuspension events, suggesting that deposition-resuspension cycles of E. coli have resulted in excessive bacterial contamination of beach water. A further hypothetical case with a breakwater shortened to half its original length, which was anticipated to enhance the current circulation in the embayment, showed a reduction in E. coli concentrations of nearly 20%.Beach water, as the interface between the land and coastal waters, is a dynamic physical and ecological system. The transport and fate of fecal indicator bacteria (FIB) in beach water not only have direct implications for human health in coastal areas (Nevers and Whitman 2005;Frick et al. 2008) but also constitute an integral influence on the coastal ecosystem. Recently, computational models allowing for a simulation of temporal and spatial variations of model variables have been developed to understand microbial water quality in open beach waters of Lake Michigan (Liu et al. 2006;Thupaki et al. 2010). Embayed (i.e., partially enclosed) beach waters have been of particular interest because of their significantly more complex hydrodynamic properties and the tendency to accumulate FIB and other contaminants (Grant and Sanders 2010).The 63rd Street Beach of Chicago, a frequently closed beach, had by far the highest Escherichia coli concentration (geometric mean 140 MPN [most probable number], 100 mL 21 ) among 23 recreational beaches along Chicago's 37-km Lake Michigan shoreline during 2000-2005. In comparison, the site with the second-highest E. coli concentration was Montrose Beach, with a geometric mean of only 77 MPN 100 mL 21 (Whitman and Nevers 2008). Since typical meteorological (e.g., rainfall) and hydrodynamic (e.g., current and wave) events usually have spatial scales larger than 37 km, the unique situation of microbial contamination at 63rd Street Beach likely resulted from local facto...

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Release of Escherichia coli from the bottom sediment in a first-order creek: Experiment and reach-specific modeling

Cited by 102 publications

References 53 publications

Restructuring of the Aquatic Bacterial Community by Hydric Dynamics Associated with Superstorm Sandy

Restructuring of the Aquatic Bacterial Community by Hydric Dynamics Associated with Superstorm Sandy

Transport of Conservative and “Smart” Tracers in a First-Order Creek: Role of Transient Storage Type

Nearshore hydrodynamics as loading and forcing factors for Escherichia coli contamination at an embayed beach

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