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https://www.readbyqxmd.com/read/29154006/hydrodynamic-modelling-of-the-influence-of-stormwater-and-combined-sewer-overflows-on-receiving-water-quality-benzo-a-pyrene-and-copper-risks-to-recreational-water
#1
Karin Björklund, Mia Bondelind, Anna Karlsson, Dick Karlsson, Ekaterina Sokolova
The risk from chemical substances in surface waters is often increased during wet weather, due to surface runoff, combined sewer overflows (CSOs) and erosion of contaminated land. There are strong incentives to improve the quality of surface waters affected by human activities, not only from ecotoxicity and ecosystem health perspectives, but also for drinking water and recreational purposes. The aim of this study is to investigate the influence of urban stormwater discharges and CSOs on receiving water in the context of chemical health risks and recreational water quality...
November 15, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29151854/strong-population-structure-deduced-from-genetics-otolith-chemistry-and-parasite-abundances-explains-vulnerability-to-localized-fishery-collapse-in-a-large-sciaenid-fish-protonibea%C3%A2-diacanthus
#2
Laura Taillebois, Diane P Barton, David A Crook, Thor Saunders, Jonathan Taylor, Mark Hearnden, Richard J Saunders, Stephen J Newman, Michael J Travers, David J Welch, Alan Greig, Christine Dudgeon, Safia Maher, Jennifer R Ovenden
As pressure on coastal marine resources is increasing globally, the need to quantitatively assess vulnerable fish stocks is crucial in order to avoid the ecological consequences of stock depletions. Species of Sciaenidae (croakers, drums) are important components of tropical and temperate fisheries and are especially vulnerable to exploitation. The black-spotted croaker, Protonibea diacanthus, is the only large sciaenid in coastal waters of northern Australia where it is targeted by commercial, recreational and indigenous fishers due to its food value and predictable aggregating behaviour...
December 2017: Evolutionary Applications
https://www.readbyqxmd.com/read/29150504/temporal-stability-of-escherichia-coli-concentrations-in-waters-of-two-irrigation-ponds-in-maryland
#3
Yakov Pachepsky, Rachel Kierzewski, Matthew Stocker, Kevin Sellner, Walter Mulbry, Hoonsoo Lee, Moon Kim
Fecal contamination of water sources is an important water quality issue for agricultural irrigation ponds. Escherichia coli concentrations are commonly used to evaluate recreational and irrigation water quality. We hypothesized that there may exist temporally stable spatial patterns of E. coli concentrations across ponds meaning that some areas mostly have higher and other have mostly lower than average concentrations of E. coli To test this hypothesis, we sampled two irrigation ponds in Maryland in nodes of spatial grids biweekly during the summer of 2016...
November 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29140134/a-nutrition-recovery-station-following-recreational-exercise-improves-fruit-consumption-but-does-not-influence-fluid-recovery
#4
Ben Desbrow, Katelyn Barnes, Caroline Young, Gregory R Cox, Chris Irwin
Immediate post-exercise access to fruit/fluid via a recovery "station" is a common feature of mass participation sporting events. Yet little evidence exists examining their impact on subsequent dietary intake. The aim of this study was to determine if access to fruit/water/sports drinks within a recovery station significantly alters dietary and fluid intakes in the immediate post-exercise period and influences hydration status the next morning. 127 (79 males) healthy participants (mean±SD, age=22.5±3.5y, body mass (BM)=73±13kg) completed two self-paced morning 10km runs separated by 1 week...
November 15, 2017: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/29126025/metallurgical-residues-reused-as-filler-after-35years-and-their-natural-weathering-implications-in-a-mountain-area
#5
Leticia Gómez-Nubla, Julene Aramendia, Silvia Fdez-Ortiz de Vallejuelo, Juan Manuel Madariaga
The natural weathering of EAF (Electric Arc Furnace) and LF (Ladle Furnace) steel slag was evaluated through changes in the mineralogical and elemental composition. For that purpose, black steel slag and mixture of black and white steel slag were collected from two forest tracks, where they had been used as filler 19 and 35years ago respectively in a protected mountain area. Primary/original and secondary/degradation compounds were identified by spectroscopic techniques (Raman Spectroscopy, X-Ray Diffraction (XRD) and Scanning Electron Microscopy/Energy Dispersive X-Ray Spectroscopy (SEM/EDS))...
November 7, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29120997/waterborne-disease-outbreaks-associated-with-environmental-and-undetermined-exposures-to-water-united-states-2013-2014
#6
R Paul McClung, David M Roth, Marissa Vigar, Virginia A Roberts, Amy M Kahler, Laura A Cooley, Elizabeth D Hilborn, Timothy J Wade, Kathleen E Fullerton, Jonathan S Yoder, Vincent R Hill
Waterborne disease outbreaks in the United States are associated with a wide variety of water exposures and are reported annually to CDC on a voluntary basis by state and territorial health departments through the National Outbreak Reporting System (NORS). A majority of outbreaks arise from exposure to drinking water (1) or recreational water (2), whereas others are caused by an environmental exposure to water or an undetermined exposure to water. During 2013-2014, 15 outbreaks associated with an environmental exposure to water and 12 outbreaks with an undetermined exposure to water were reported, resulting in at least 289 cases of illness, 108 hospitalizations, and 17 deaths...
November 10, 2017: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/29114693/estimating-the-probability-of-illness-due-to-swimming-in-recreational-water-with-a-mixture-of-human-and-gull-associated-microbial-source-tracking-markers
#7
Kendra I Brown, Katherine E Graham, Jeffrey A Soller, Alexandria B Boehm
Beaches often receive fecal contamination from more than one source. Human sources include untreated sewage as well as treated wastewater effluent, and animal sources include wildlife such as gulls. Different contamination sources are expected to pose different health risks to swimmers. Genetic microbial source tracking (MST) markers can be used to detect bacteria that are associated with different animal sources, but the health risks associated with a mixture of MST markers are unknown. This study presents a method for predicting these health risks, using human- and gull-associated markers as an example...
November 8, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/29109026/a-low-friction-biphasic-and-boundary-lubricating-hydrogel-for-cartilage-replacement
#8
Piers E Milner, Maria Parkes, Jennifer L Puetzer, Robert Chapman, Molly M Stevens, Philippa Cann, Jonathan Jeffers
Partial joint repair is a surgical procedure where an artificial material is used to replace localised chondral damage. These artificial bearing surfaces must articulate against cartilage, but current materials do not replicate both the biphasic and boundary lubrication mechanisms of cartilage. A research challenge therefore exists to provide a material that mimics both boundary and biphasic lubrication mechanisms of cartilage. In this work a polymeric network of a biomimetic boundary lubricant, poly(2-methacryloyloxyethyl phosphorylcholine) (PMPC), was incorporated into an ultra-tough double network (DN) biphasic (water phase + polymer phase) gel, to form a PMPC triple network (PMPC TN) hydrogel with boundary and biphasic lubrication capability...
November 3, 2017: Acta Biomaterialia
https://www.readbyqxmd.com/read/29105107/sunscreen-formulations-do-not-interfere-with-sweat-cooling-during-exercise
#9
Hao Ou-Yang, Karen Meyer, Tim Houser, Gary Grove
OBJECTIVE: Sweating plays a critical role in maintaining thermal balance and keeping skin cool during exercise. People often wear sunscreens on hot summer days for sun protection. Most recreational sunscreens are designed to be water and sweat resistant, so that sweating will not remove or compromise the protection. The objective of this study was to determine whether wearing sweat-resistant sunscreen might impede natural sweating, potentially interfering with thermal regulation and resulting in the elevation of skin temperature...
November 3, 2017: International Journal of Cosmetic Science
https://www.readbyqxmd.com/read/29103646/comparative-enteric-viruses-and-coliphage-removal-during-wastewater-treatment-processes-in-a-sub-tropical-environment
#10
J P S Sidhu, K Sena, L Hodgers, A Palmer, S Toze
Microbiological safety of reclaimed water is one of the most important issues in managing potential health risks related to wastewater recycling. Presence and removal of human adenovirus (HAdV), human polyomavirus (HPyV), human torque teno virus (HTtV) and somatic coliphage family Microviridae in three wastewater treatment plants (WWTP) in sub-tropical Brisbane, Australia was investigated. All three WWTPs employ activated sludge process with added on Bardenpho process for nutrient removal. HPyV, HAdV, HTtV and Microviridae were consistently detected in the influent (10(5) to 10(6) Genomic copies (GC) L(-1)) and secondary treated effluent (10(2) to 10(3)GCL(-)(1))...
November 2, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29101858/a-human-fecal-contamination-score-for-ranking-recreational-sites-using-the-hf183-bacr287-quantitative-real-time-pcr-method
#11
Yiping Cao, Mano Sivaganesan, Catherine A Kelty, Dan Wang, Alexandria B Boehm, John F Griffith, Stephen B Weisberg, Orin C Shanks
Human fecal pollution of recreational waters remains a public health concern worldwide. As a result, there is a growing interest in the application of human-associated fecal source identification quantitative real-time PCR (qPCR) technologies for water quality research and management. However, there are currently no standardized approaches for field implementation and interpretation of qPCR data. In this study, a standardized HF183/BacR287 qPCR method was combined with a water sampling strategy and a novel Bayesian weighted average approach to establish a human fecal contamination score (HFS) that can be used to prioritize sampling sites for remediation based on measured human waste levels...
October 31, 2017: Water Research
https://www.readbyqxmd.com/read/29100633/daily-relative-dog-abundance-fecal-density-and-loading-rates-on-intensively-and-minimally-managed-dog-friendly-beaches-in-central-california
#12
Stori C Oates, Melissa A Miller, Dane Hardin, Clare Dominik, David Jessup, Woutrina A Smith
Due to increased concerns regarding fecal pollution at marine recreational beaches, daily relative dog abundance and fecal density were estimated on an intensively managed (Beach 1) and a minimally managed (Beach 2) dog beach in Monterey County, California. Fecal loading and factors predictive of fecal deposition also were assessed. After standardizing for beach area, daily beach use and fecal densities did not differ between beaches and yearly fecal loading estimates revealed that unrecovered dog feces likely contributes significantly to fecal contamination (1...
October 31, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29095959/wanted-dead-or-alive-using-metabarcoding-of-environmental-dna-and-rna-to-distinguish-living-assemblages-for-biosecurity-applications
#13
Xavier Pochon, Anastasija Zaiko, Lauren M Fletcher, Olivier Laroche, Susanna A Wood
High-throughput sequencing metabarcoding studies in marine biosecurity have largely focused on targeting environmental DNA (eDNA). DNA can persist extracellularly in the environment, making discrimination of living organisms difficult. In this study, bilge water samples (i.e., water accumulating on-board a vessel during transit) were collected from 15 small recreational and commercial vessels. eDNA and eRNA molecules were co-extracted and the V4 region of the 18S ribosomal RNA gene targeted for metabarcoding...
2017: PloS One
https://www.readbyqxmd.com/read/29080323/seascape-genomics-reveals-fine-scale-patterns-of-dispersal-for-a-reef-fish-along-the-ecologically-divergent-coast-of-northwestern-australia
#14
Joseph D DiBattista, Michael J Travers, Glenn I Moore, Richard D Evans, Stephen J Newman, Ming Feng, Samuel D Moyle, Rebecca J Gorton, Thor Saunders, Oliver Berry
Understanding the drivers of dispersal among populations is a central topic in marine ecology and fundamental for spatially explicit management of marine resources. The extensive coast of Northwestern Australia provides an emerging frontier for implementing new genomic tools to comparatively identify patterns of dispersal across diverse and extreme environmental conditions. Here, we focused on the stripey snapper (Lutjanus carponotatus), which is important to recreational, charter-based and customary fishers throughout the Indo-West Pacific...
October 28, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/29071393/association-mapping-of-drought-tolerance-related-traits-in-barley-to-complement-a-traditional-biparental-qtl-mapping-study
#15
Magdalena Wójcik-Jagła, Anna Fiust, Janusz Kościelniak, Marcin Rapacz
Association mapping of drought-related traits in barley was used to increase the density of existing QTL maps without recreating mapping populations. We used 109 spring barley genotypes exhibiting high or low drought tolerance to elucidate the associations between diversity array technology sequencing (DArTseq) and single nucleotide polymorphism (SNP) markers and various physiological parameters related to plant responses to drought conditions. The study was performed in controlled conditions (growth chambers), drought tolerance was phenotyped in the four-leaf seedlings...
October 25, 2017: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
https://www.readbyqxmd.com/read/29057822/risk-levels-of-toxic-cyanobacteria-in-portuguese-recreational-freshwaters
#16
Carina Menezes, Catarina Churro, Elsa Dias
Portuguese freshwater reservoirs are important socio-economic resources, namely for recreational use. National legislation concerning bathing waters does not include mandatory levels or guidelines for cyanobacteria and cyanotoxins. This is an issue of concern since cyanotoxin-based evidence is insufficient to change the law, and the collection of scientific evidence has been hampered by the lack of regulatory levels for cyanotoxins in bathing waters. In this work, we evaluate the profile of cyanobacteria and microcystins (MC) in eight freshwater reservoirs from the center of Portugal, used for bathing/recreation, in order to determine the risk levels concerning toxic cyanobacteria occurrence...
October 18, 2017: Toxins
https://www.readbyqxmd.com/read/29040072/enterococci-populations-of-a-metropolitan-river-after-an-extreme-flood-event-prevalence-persistence-and-virulence-determinants
#17
Nicole M Masters, Aaron Wiegand, Jasmin M Thompson, Tara L Vollmerhausen, Eva Hatje, Mohammad Katouli
We investigated the prevalence, persistence and virulence determinants of enterococci populations in water samples collected over three rounds following an extreme flood event in a metropolitan river. Enterococci (n = 482) were typed using the high resolution biochemical fingerprinting method (PhP typing) and grouped into common (C) or single (S) biochemical phenotypes (BPTs). In all, 23 C-BPTs (72.6% of isolates) were found across the sites. A representative isolate of each C-BPT was identified to the species level and tested for the presence of seven virulence genes (VGs), biofilm formation and resistance to 14 antibiotics...
October 2017: Journal of Water and Health
https://www.readbyqxmd.com/read/29034161/going-green-ex-post-valuation-of-a-multipurpose-water-infrastructure-in-northern-italy
#18
Arnaud Reynaud, Denis Lanzanova, Camino Liquete, Bruna Grizzetti
A contingent valuation approach is used to estimate how households value different multipurpose infrastructures (conventional or green) for managing flood risk and water pollution. As a case study we consider the Gorla Maggiore water park located in the Lombardy Region, in Northern Italy. The park is a neo-ecosystem including an infrastructure to treat waste water and store excess rain water, built in 2011 on the shore of the Olona River in an area previously used for poplar plantation. This park is the first one of this type built in Italy...
October 2017: Ecosystem Services
https://www.readbyqxmd.com/read/28984083/temporal-trends-in-giardia-occurrence-in-the-grand-river-and-surrounding-tributaries-waterloo-ontario-2005-2013-a-retrospective-analysis-of-surveillance-data
#19
A L Swirski, D L Pearl, A S Peregrine, J Thomas, K Pintar
Giardia contamination in the Grand River Watershed (south-western Ontario, Canada) was monitored from 2005 to 2013 as part of FoodNet Canada. Our study objectives were to describe the temporal pattern of Giardia occurrence and determine whether water quality parameters and bacterial indicators could act as effective markers for Giardia occurrence. Water samples were collected monthly from the Grand River near a drinking water intake point (2005-2013) and also collected intermittently from other areas in the watershed during the study period...
October 5, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28969670/exposure-to-human-associated-fecal-indicators-and-self-reported-illness-among-swimmers-at-recreational-beaches-a-cohort-study
#20
Melanie D Napier, Richard Haugland, Charles Poole, Alfred P Dufour, Jill R Stewart, David J Weber, Manju Varma, Jennifer S Lavender, Timothy J Wade
BACKGROUND: Fecal indicator bacteria used to assess illness risks in recreational waters (e.g., Escherichia coli, Enterococci) cannot discriminate among pollution sources. To address this limitation, human-associated Bacteroides markers have been proposed, but the risk of illness associated with the presence of these markers in recreational waters is unclear. Our objective was to estimate associations between human-associated Bacteroides markers in water and self-reported illness among swimmers at 6 U...
October 2, 2017: Environmental Health: a Global Access Science Source
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