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https://www.readbyqxmd.com/read/28073564/education-and-notification-approaches-for-harmful-algal-blooms-habs-washington-state-usa
#1
F Joan Hardy, Debra Bouchard, Marisa Burghdoff, Ray Hanowell, Beth LeDoux, Ellen Preece, Lindsay Tuttle, Gene Williams
While numerous strategies have been used to educate and notify the public about potential hazards from exposure to Harmful Algal Blooms (HABs), at present there are no national guidelines or suggested outreach approaches. To raise public awareness and determine effective HAB outreach methods, two Washington State agencies and three counties in the Puget Sound region implemented several education and notification strategies. These approaches were rated for effectiveness by state and county public health and water quality professionals...
December 2016: Harmful Algae
https://www.readbyqxmd.com/read/28073455/estimating-microcystin-levels-at-recreational-sites-in-western-lake-erie-and-ohio
#2
Donna S Francy, Amie M G Brady, Christopher D Ecker, Jennifer L Graham, Erin A Stelzer, Pamela Struffolino, Daryl F Dwyer, Keith A Loftin
Cyanobacterial harmful algal blooms (cyanoHABs) and associated toxins, such as microcystin, are a major global water-quality issue. Water-resource managers need tools to quickly predict when and where toxin-producing cyanoHABs will occur. This could be done by using site-specific models that estimate the potential for elevated toxin concentrations that cause public health concerns. With this study, samples were collected at three Ohio lakes to identify environmental and water-quality factors to develop linear-regression models to estimate microcystin levels...
September 2016: Harmful Algae
https://www.readbyqxmd.com/read/28073441/applied-simulations-and-integrated-modelling-for-the-understanding-of-toxic-and-harmful-algal-blooms-asimuth-integrated-hab-forecast-systems-for-europe-s-atlantic-arc
#3
Julie Maguire, Caroline Cusack, Manuel Ruiz-Villarreal, Joe Silke, Deirdre McElligott, Keith Davidson
Reasons for the emergent interest in HABs are abundant, including concerns associated with human health, adverse effects on biological resources, economic losses attributed to recreation, tourism and seafood related industries, and the cost of maintaining public advisory services and monitoring programs for shellfish toxins and water quality. The impact of HABs can potentially be mitigated by early warning of their development. In this regard the project ASIMUTH (Applied Simulations and Integrated Modelling for the Understanding of Toxic and Harmful algal blooms) was borne in order to develop short term HAB alert systems for Atlantic Europe...
March 2016: Harmful Algae
https://www.readbyqxmd.com/read/28062073/sludge-accumulation-and-distribution-impact-the-hydraulic-performance-in-waste-stabilisation-ponds
#4
Liah X Coggins, Marco Ghisalberti, Anas Ghadouani
Waste stabilisation ponds (WSPs) are used worldwide for wastewater treatment, and throughout their operation require periodic sludge surveys. Sludge accumulation in WSPs can impact performance by reducing the effective volume of the pond, and altering the pond hydraulics and wastewater treatment efficiency. Traditionally, sludge heights, and thus sludge volume, have been measured using low-resolution and labour intensive methods such as 'sludge judge' and the 'white towel test'. A sonar device, a readily available technology, fitted to a remotely operated vehicle (ROV) was shown to improve the spatial resolution and accuracy of sludge height measurements, as well as reduce labour and safety requirements...
November 9, 2016: Water Research
https://www.readbyqxmd.com/read/28025806/the-first-detection-of-potentially-toxic-microcystis-strains-in-two-middle-atlas-mountains-natural-lakes-morocco
#5
Mountasser Douma, Youness Ouahid, Mohammed Loudiki, Francisca F Del Campo, Brahim Oudra
Aguelmam Azizgza (LAZ) and Dayet Afourgah (DAF) are two Moroccan natural lakes located in a humid hydrographic basin of the Middle Atlas Mountains. Both are considered important reservoirs of plant and animal biodiversity. In addition, they are extensively used for recreational and fishing activities and as a water source for irrigation of agricultural crops. Recurrent cyanobacteria scum episodes in the two water bodies have been reported, Microcystis being the main genus in the scums. Here, we report on the toxic potential of three Microcystis aeruginosa strains isolated from those lakes: Mic LAZ and Mic B7 from LAZ and Mic DAF isolated from DAF...
January 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28024746/citizen-science-based-water-quality-monitoring-constructing-a-large-database-to-characterize-the-impacts-of-combined-sewer-overflow-in-new-york-city
#6
David J Farnham, Rebecca A Gibson, Diana Y Hsueh, Wade R McGillis, Patricia J Culligan, Nina Zain, Rob Buchanan
To protect recreational water users from waterborne pathogen exposure, it is crucial that waterways are monitored for the presence of harmful bacteria. In NYC, a citizen science campaign is monitoring waterways impacted by inputs of storm water and untreated sewage during periods of rainfall. However, the spatial and temporal scales over which the monitoring program can sample are constrained by cost and time, thus hindering the construction of databases that benefit both scientists and citizens. In this study, we first illustrate the scientific value of a citizen scientist monitoring campaign by using the data collected through the campaign to characterize the seasonal variability of sampled bacterial concentration as well as its response to antecedent rainfall...
December 23, 2016: Science of the Total Environment
https://www.readbyqxmd.com/read/27990123/brief-rewarming-blunts-hypothermia-induced-alterations-in-sensation-motor-drive-and-cognition
#7
Marius Brazaitis, Henrikas Paulauskas, Albertas Skurvydas, Henning Budde, Laura Daniuseviciute, Nerijus Eimantas
Background: It is well known that cold exposure experienced during occupational or recreational activities may adversely affect motor, cognitive performance, and health. Most research has used prolonged passive external rewarming modalities and focused on the direct effects on the kinetics of physiological and psychological responses in hypothermic subjects. However, the brief whole body rewarming effects on physiological and psychological responses in parallel with functional consequences on cognitive and neurophysiological functions have not been investigated...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27986723/whole-genome-analysis-of-antimicrobial-resistant-and-extraintestinal-pathogenic-escherichia-coli-in-river-water
#8
Ryota Gomi, Tomonari Matsuda, Yasufumi Matsumura, Masaki Yamamoto, Michio Tanaka, Satoshi Ichiyama, Minoru Yoneda
: Contamination of surface waters by antimicrobial-resistant bacteria and pathogenic bacteria is a great concern. In this study, 531 Escherichia coli isolates obtained from the Yamato River (Japan) were evaluated phenotypically for resistance to 25 antimicrobials. Seventy-six (14.3%) were multidrug resistant (MDR), 66 (12.4%) were non-susceptible to one or two classes of agents, and 389 (73.3%) were susceptible. We performed whole-genome sequencing using Illumina technology on selected strains...
December 16, 2016: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/27978443/dynamically-linking-economic-models-to-ecological-condition-for-coastal-zone-management-application-to-sustainable-tourism-planning
#9
Anthony Dvarskas
While the development of the tourism industry can bring economic benefits to an area, it is important to consider the long-run impact of the industry on a given location. Particularly when the tourism industry relies upon a certain ecological state, those weighing different development options need to consider the long-run impacts of increased tourist numbers upon measures of ecological condition. This paper presents one approach for linking a model of recreational visitor behavior with an ecological model that estimates the impact of the increased visitors upon the environment...
March 1, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/27964734/therapeutic-properties-in-tunisian-hot-springs-first-evidence-of-phenolic-compounds-in-the-cyanobacterium-leptolyngbya-sp-biomass-capsular-polysaccharides-and-releasing-polysaccharides
#10
Lamia Trabelsi, Amira Mnari, Mohamed M Abdel-Daim, Salwa Abid-Essafi, Lotfi Aleya
BACKGROUND: In Tunisia, the use of hot spring waters for both health and recreation is a tradition dating back to Roman times. In fact, thermal baths, usually called "Hammam" are recommended as a therapeutic and prophylactic measure against many types of illness and toxicity. While the chemical concentration of thermal water is admittedly associated with its therapeutic effects, the inclusion in spa waters of efficient bioproduct additives produced by photosynthetic microorganisms and that act against oxidative stress may comprise a significant supplementary value for thermal centers...
December 13, 2016: BMC Complementary and Alternative Medicine
https://www.readbyqxmd.com/read/27935960/hydrological-regime-and-water-shortage-as-drivers-of-the-seasonal-incidence-of-diarrheal-diseases-in-a-tropical-montane-environment
#11
Laurie Boithias, Marc Choisy, Noy Souliyaseng, Marine Jourdren, Fabrice Quet, Yves Buisson, Chanthamousone Thammahacksa, Norbert Silvera, Keooudone Latsachack, Oloth Sengtaheuanghoung, Alain Pierret, Emma Rochelle-Newall, Sylvia Becerra, Olivier Ribolzi
BACKGROUND: The global burden of diarrhea is a leading cause of morbidity and mortality worldwide. In montane areas of South-East Asia such as northern Laos, recent changes in land use have induced increased runoff, soil erosion and in-stream suspended sediment loads, and potential pathogen dissemination. To our knowledge, few studies have related diarrhea incidences to catchment scale hydrological factors such as river discharge, and loads of suspended sediment and of Fecal Indicator Bacteria (FIB) such as Escherichia coli, together with sociological factors such as hygiene practices...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27934240/modeling-the-endogenous-sunlight-inactivation-rates-of-laboratory-strain-and-wastewater-e-coli-and-enterococci-using-biological-weighting-functions
#12
Andrea I Silverman, Kara L Nelson
Models that predict sunlight inactivation rates of bacteria are valuable tools for predicting the fate of pathogens in recreational waters and designing natural wastewater treatment systems to meet disinfection goals. We developed biological weighting function (BWF)-based numerical models to estimate the endogenous sunlight inactivation rates of E. coli and enterococci. BWF-based models allow the prediction of inactivation rates under a range of environmental conditions that shift the magnitude or spectral distribution of sunlight irradiance (e...
November 15, 2016: Environmental Science & Technology
https://www.readbyqxmd.com/read/27932214/a-regional-assessment-of-chemicals-of-concern-in-surface-waters-of-four-midwestern-united-states-national-parks
#13
Sarah M Elliott, David D VanderMeulen
Anthropogenic chemicals and their potential for adverse biological effects raise concern for aquatic ecosystem health in protected areas. During 2013-15, surface waters of four Midwestern United States national parks were sampled and analyzed for wastewater indicators, pharmaceuticals, personal care products, and pesticides. More chemicals and higher concentrations were detected at the two parks with greater urban influences (Mississippi National River and Recreation Area and Indiana Dunes National Lakeshore) than at the two more remote parks (Apostle Islands National Lakeshore and Isle Royale National Park)...
February 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27887836/modelling-white-water-rafting-suitability-in-a-hydropower-regulated-alpine-river
#14
Mauro Carolli, Guido Zolezzi, Davide Geneletti, Annunziato Siviglia, Fabiano Carolli, Oscar Cainelli
Cultural and recreational river ecosystem services and their relations with the flow regime are still poorly investigated. We develop a modelling-based approach to assess recreational flow requirements and the spatially distributed river suitability for white-water rafting, a typical service offered by mountain streams, with potential conflicts of interest with hydropower regulation. The approach is based on the principles of habitat suitability modelling using water depth as the main attribute, with preference curves defined through interviews with local rafting guides...
February 1, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/27845404/regional-probabilistic-risk-assessment-of-heavy-metals-in-different-environmental-media-and-land-uses-an-urbanization-affected-drinking-water-supply-area
#15
Chi Peng, Yimin Cai, Tieyu Wang, Rongbo Xiao, Weiping Chen
In this study, we proposed a Regional Probabilistic Risk Assessment (RPRA) to estimate the health risks of exposing residents to heavy metals in different environmental media and land uses. The mean and ranges of heavy metal concentrations were measured in water, sediments, soil profiles and surface soils under four land uses along the Shunde Waterway, a drinking water supply area in China. Hazard quotients (HQs) were estimated for various exposure routes and heavy metal species. Riverbank vegetable plots and private vegetable plots had 95(th) percentiles of total HQs greater than 3 and 1, respectively, indicating high risks of cultivation on the flooded riverbank...
November 15, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27783963/new-insights-into-cytotoxicity-induced-by-microcystin-lr-estradiol-and-ractopamine-with-mathematical-models-individual-and-combined-effects
#16
Min Ma, Fuwei Pi, Jiasheng Wang, Jian Ji, Xiulan Sun
Humans are most likely to be exposed to microcystins (MCs) combined with other water pollutants rather than to individual compounds through the consumption of contaminated drinking water or through recreational activities, such as swimming. However, the combined effects of MC-LR, estradiol (EST), and ractopamine (RAC) have not been extensively researched. The goal of this study was to investigate the combined effects of these compounds. For this purpose, cytotoxicity was evaluated in HepG2 cells treated with single or combined doses of MC-LR, EST, and RAC based on concentration addition (CA), independent action (IA), and Chou-Talalay's combination-index (CI) methods...
February 2017: Chemosphere
https://www.readbyqxmd.com/read/27771874/in-situ-dynamics-of-f-specific-rna-bacteriophages-in-a-small-river-new-way-to-assess-viral-propagation-in-water-quality-studies
#17
Blandine Fauvel, Christophe Gantzer, Henry-Michel Cauchie, Leslie Ogorzaly
The occurrence and propagation of enteric viruses in rivers constitute a major public health issue. However, little information is available on the in situ transport and spread of viruses in surface water. In this study, an original in situ experimental approach using the residence time of the river water mass was developed to accurately follow the propagation of F-specific RNA bacteriophages (FRNAPHs) along a 3-km studied river. Surface water and sediment of 9 sampling campaigns were collected and analyzed using both infectivity and RT-qPCR assays...
October 22, 2016: Food and Environmental Virology
https://www.readbyqxmd.com/read/27771724/association-between-recreational-physical-activity-and-the-risk-of-upper-urinary-calculi
#18
Jian-Xin Chen, Xiao-Xiang Yu, Yu Ye, Xiao-Bo Yang, Ai-Hua Tan, Xiao-Ying Xian, Su-Chun Wei, Jun Long, Zeng-Nan Mo
OBJECTIVE: Upper urinary calculi (UUC) is considered to be a comprehensive disease associated with many risk factors, but the role of physical activity (PA) is undefined. Here, we conducted a cross-sectional study to investigate this relationship in Asian populations. MATERIALS AND METHODS: Patients diagnosed with UUC were the subjects of study and those who participated in a health examination in local medical center were included as controls. Information was collected through the same standard questionnaire...
October 21, 2016: Urologia Internationalis
https://www.readbyqxmd.com/read/27771099/escherichia-coli-in-marine-water-comparison-of-methods-for-the-assessment-of-recreational-bathing-water-samples
#19
Darija Vukić Lušić, Slaven Jozić, Arijana Cenov, Marin Glad, Marko Bulić, Dražen Lušić
Bathing Water Directive (2006/7/EC) specifies two reference methods for Escherichia coli detection: ISO 9308-1 and 9308-3. The revised ISO 9308-1 is recommended only for waters with a low bacterial background flora. Considering the extended time needed for analysis and, generally, the lack of experience in using ISO 9308-3 in the Mediterranean, the suitability of ISO 9308-1 for the examination of E. coli in bathing water was evaluated. The present study was aimed at a comparison of data obtained by the reference method in seawater samples (110 beaches, N=477) with data received from six alternative methods...
December 15, 2016: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/27766153/physiological-stress-response-reflex-impairment-and-delayed-mortality-of-white-sturgeon-acipenser-transmontanus-exposed-to-simulated-fisheries-stressors
#20
Montana F McLean, Kyle C Hanson, Steven J Cooke, Scott G Hinch, David A Patterson, Taylor L Nettles, Matt K Litvak, Glenn T Crossin
White sturgeon (Acipenser transmontanus) are the largest freshwater fish in North America and a species exposed to widespread fishing pressure. Despite the growing interest in recreational fishing for white sturgeon, little is known about the sublethal and lethal impacts of angling on released sturgeon. In summer (July 2014, mean water temperature 15.3°C) and winter (February 2015, mean water temperature 6.6°C), captive white sturgeon (n = 48) were exposed to a combination of exercise and air exposure as a method of simulating an angling event...
2016: Conservation Physiology
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