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https://www.readbyqxmd.com/read/28636253/estimation-of-vanadium-water-quality-benchmarks-for-the-protection-of-aquatic-life-with-relevance-to-the-athabasca-oil-sands-region-using-species-sensitivity-distributions
#1
Stephanie Schiffer, Karsten Liber
Elevated vanadium (V) concentrations in oil sands coke, which is produced and stored on the site of some major Athabasca Oil Sands companies, could pose a risk to aquatic ecosystems in northern Alberta, Canada, depending on its future storage and utilization. In the present study, V toxicity was determined in reconstituted Athabasca River water to various freshwater organisms, including 2 midge species (Chironomus dilutus and Chironomus riparius; 4-d and 30- to 40-d exposures) and 2 freshwater fish species (Oncorhynchus mykiss and Pimephales promelas; 4-d and 28-d exposures) to facilitate estimation of water quality benchmarks...
June 21, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28636199/widespread-occurrence-and-potential-for-biodegradation-of-bioactive-contaminants-in-congaree-national-park-usa
#2
Paul M Bradley, William A Battaglin, Jimmy M Clark, Frank Henning, Michelle L Hladik, Luke R Iwanowicz, Celeste A Journey, Jeffrey W Riley, Kristin M Romanok
Organic contaminants with designed molecular bioactivity, such as pesticides and pharmaceuticals, originate from human and agricultural sources, occur frequently in surface waters, and threaten the structure and function of aquatic and terrestrial ecosystems. Congaree National Park in South Carolina (USA) is a vulnerable park unit due to its location downstream of multiple urban and agricultural contaminant sources and its hydrologic setting, being composed almost entirely of floodplain and aquatic environments...
June 21, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28633950/a-multi-scale-integrated-modeling-framework-to-measure-comprehensive-impact-of-coastal-reclamation-activities-in-yellow-river-estuary-china
#3
Yan Xu, Yanpeng Cai, Tao Sun, Qian Tan
In this paper, an improved multi-scale integrated modeling framework has been established to evaluate coastal reclamation intensity (CRI). About 7 indicators are considered, including ecological degradation intensity (EDI), hydrodynamic disturbance (IHD), engineering types, water quality, economic investment, population growth, and reclaimed land area. Meanwhile, an integrated framework enhanced methods in terms of (a) measuring intensity of ecological degradation process under multi-scale impact, (b) developing the indicator system of CRI, and discussing the driving forces and trends of coastal reclamation, (c) determining fuzzy preference relations of weight and calculating the specific value of CRI with the case study areas of Yellow River estuary from 2000 to 2015...
June 17, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28632343/dispersal-isolation-and-diversification-with-continued-gene-flow-in-an-andean-tropical-dry-forest
#4
R Toby Pennington, Matt Lavin
The Andes are the world's longest mountain chain, and the tropical Andes are the world's richest biodiversity hot spot. The origin of the tropical Andean cordillera is relatively recent because the elevation of the mountains was relatively low (400-2500 m palaeoelevations) only 10 MYA with final uplift being rapid. These final phases of the Andean orogeny are thought to have had a fundamental role in shaping processes of biotic diversification and biogeography, with these effects reaching far from the mountains themselves by changing the course of rivers and deposition of mineral-rich Andean sediments across the massive Amazon basin...
July 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28631839/natural-variability-of-biochemical-biomarkers-in-the-macro-zoobenthos-dependence-on-life-stage-and-environmental-factors
#5
Lucia Scarduelli, Roberto Giacchini, Paolo Parenti, Sonia Migliorati, Agnese Maria Di Brisco, Marco Vighi
Biomarkers are widely used in ecotoxicology as indicators of exposure to toxicants. However, their ability to provide ecologically relevant information remains controversial. One of the major problems is understanding if the measured responses are determined by stress factors or lie within the natural variability range. In a previous work, the natural variability of enzymatic levels in invertebrates sampled in pristine rivers was proved to be relevant across both space and time. In this work, the experimental design was improved by considering different life stages of the selected taxa and by measuring more environmental parameters...
June 20, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28631825/studies-on-the-occurrence-of-infectious-myonecrosis-virus-in-pond-reared-litopenaeus-vannamei-boone-1931-in-india
#6
A S Sahul Hameed, S Abdul Majeed, S Vimal, N Madan, T Rajkumar, S Santhoshkumar, S Sivakumar
Whiteleg shrimp, Litopenaeus vannamei, with clinical sign of muscle opaqueness with reddish colour at the distal abdominal segments were observed in farms located in West Bengal State, India. The mortality of shrimp in all disease outbreak ponds ranged from 20% to 50%, and mortality increased gradually. The RT-PCR assay of these samples using primer sets specific to infectious myonecrosis virus (IMNV) revealed its presence in the disease outbreak ponds. The IMNV infection was reproduced in healthy shrimp by intramuscular injection to satisfy River's postulates...
June 20, 2017: Journal of Fish Diseases
https://www.readbyqxmd.com/read/28631030/the-impact-of-impoundment-on-mercury-bioaccumulation-in-fish-downstream-from-a-newly-constructed-reservoir-wujiang-river-southwest-china
#7
Sixin Li, Lianfeng Zhou, Jianbo Chang, Zhi Yang, Juxiang Hu, Wang Hongjun
Mercury concentrations in fish were investigated downstream from a newly impounded subtropical reservoir in August 2008. After 6-7 months of reservoir impoundment, mean mercury concentration in fish from downstream is significantly increased by 1.9 times. Not only carnivorous fish but also benthic fish had significantly higher total mercury concentrations than others. No significant correlation was found between total mercury concentrations and body length or weight of 13 fish species. Compared with the pre-impoundment, total mercury in fish from downstream is significantly increased by reservoir impoundment, but the increased rate is lower than those in subarctic and temperate areas...
June 19, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28630330/annual-mass-drownings-of-the-serengeti-wildebeest-migration-influence-nutrient-cycling-and-storage-in-the-mara-river
#8
Amanda L Subalusky, Christopher L Dutton, Emma J Rosi, David M Post
The annual migration of ∼1.2 million wildebeest (Connochaetes taurinus) through the Serengeti Mara Ecosystem is the largest remaining overland migration in the world. One of the most iconic portions of their migration is crossing of the Mara River, during which thousands drown annually. These mass drownings have been noted, but their frequency, size, and impact on aquatic ecosystems have not been quantified. Here, we estimate the frequency and size of mass drownings in the Mara River and model the fate of carcass nutrients through the river ecosystem...
June 19, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28629436/disease-compass-a-navigation-system-for-disease-knowledge-based-on-ontology-and-linked-data-techniques
#9
Kouji Kozaki, Yuki Yamagata, Riichiro Mizoguchi, Takeshi Imai, Kazuhiko Ohe
BACKGROUND: Medical ontologies are expected to contribute to the effective use of medical information resources that store considerable amount of data. In this study, we focused on disease ontology because the complicated mechanisms of diseases are related to concepts across various medical domains. The authors developed a River Flow Model (RFM) of diseases, which captures diseases as the causal chains of abnormal states. It represents causes of diseases, disease progression, and downstream consequences of diseases, which is compliant with the intuition of medical experts...
June 19, 2017: Journal of Biomedical Semantics
https://www.readbyqxmd.com/read/28629112/european-demonstration-program-on-the-effect-based-and-chemical-identification-and-monitoring-of-organic-pollutants-in-european-surface-waters
#10
Zuzana Tousova, Peter Oswald, Jaroslav Slobodnik, Ludek Blaha, Melis Muz, Meng Hu, Werner Brack, Martin Krauss, Carolina Di Paolo, Zsolt Tarcai, Thomas-Benjamin Seiler, Henner Hollert, Sanja Koprivica, Marijan Ahel, Jennifer E Schollée, Juliane Hollender, Marc J-F Suter, Anita O Hidasi, Kristin Schirmer, Manoj Sonavane, Selim Ait-Aissa, Nicolas Creusot, Francois Brion, Jean Froment, Ana Catarina Almeida, Kevin Thomas, Knut Erik Tollefsen, Sara Tufi, Xiyu Ouyang, Pim Leonards, Marja Lamoree, Victoria Osorio Torrens, Annemieke Kolkman, Merijn Schriks, Petra Spirhanzlova, Andrew Tindall, Tobias Schulze
Growing concern about the adverse environmental and human health effects of a wide range of micropollutants requires the development of novel tools and approaches to enable holistic monitoring of their occurrence, fate and effects in the aquatic environment. A European-wide demonstration program (EDP) for effect-based monitoring of micropollutants in surface waters was carried out within the Marie Curie Initial Training Network EDA-EMERGE. The main objectives of the EDP were to apply a simplified protocol for effect-directed analysis, to link biological effects to target compounds and to estimate their risk to aquatic biota...
June 14, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28628866/anticancer-drugs-consumption-trends-in-spain-prediction-of-environmental-concentrations-and-potential-risks
#11
Helena Franquet-Griell, Cristian Gómez-Canela, Francesc Ventura, Silvia Lacorte
This study presents the occurrence and impact of 78 anticancer drugs in Spanish river basins based on consumption data in pharmacies during the period 2010-2015 and calculation of the predicted environmental concentrations (PEC). The total consumption of anticancer drugs in Spanish pharmacies was of 23.4 tons in 2015, being mycophenolic acid and hydroxycarbamide the drugs with the highest prescription. Their PECs in river at national scale were up to 80 ng/L. However, the use of different dilution factors revealed major differences between hydrographic basins, and PECriver rose up to 68,014 ng/L in highly populated rivers with low flows...
June 16, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28628820/river-flow-is-critical-for-vegetation-dynamics-lessons-from-multi-scale-analysis-in-a-hyper-arid-endorheic-basin
#12
Qin Shen, Guangyao Gao, Yihe Lü, Shuai Wang, Xiaohui Jiang, Bojie Fu
Knowledge of the spatio-temporal responses of vegetation dynamics to hydro-climatic factors is important to assess ecological restoration efforts in arid and semiarid areas. In this study, the vegetation dynamics during 2000-2015 were investigated in the downstream area of the Heihe River Basin (HRB) in Northwest China where an ecological water diversion project (EWDP) commenced in 2000. The spatio-temporal relationships between vegetation cover and climatic factors (precipitation and temperature) and available water resources (river flow and groundwater) were determined...
June 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28628817/dynamics-of-dissolved-nutrients-in-the-aquaculture-shrimp-ponds-of-the-min-river-estuary-china-concentrations-fluxes-and-environmental-loads
#13
Ping Yang, Derrick Y F Lai, Baoshi Jin, David Bastviken, Lishan Tan, Chuan Tong
Dissolved inorganic nutrients (NO2(-)-N, NO3(-)-N, NH4(+)-N, and PO4(3-)-P) play a critical role in the effective management of water quality and prevention of fish and shrimp diseases in aquaculture systems. In this study, dissolved inorganic nutrient concentrations in the water column and sediment porewater, and the fluxes across the sediment-water interface (SWI) were investigated in three intensive shrimp ponds with zero water exchange to examine nutrient cycling during the different growth stages of shrimps...
June 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28628816/are-calanco-landforms-similar-to-river-basins
#14
N A Caraballo-Arias, V Ferro
In the past badlands have been often considered as ideal field laboratories for studying landscape evolution because of their geometrical similarity to larger fluvial systems. For a given hydrological process, no scientific proof exists that badlands can be considered a model of river basin prototypes. In this paper the measurements carried out on 45 Sicilian calanchi, a type of badlands that appears as a small-scale hydrographic unit, are used to establish their morphological similarity with river systems whose data are available in the literature...
June 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28628812/modelling-water-and-nutrient-fluxes-in-the-danube-river-basin-with-swat
#15
REVIEW
Anna Malagó, Faycal Bouraoui, Olga Vigiak, Bruna Grizzetti, Marco Pastori
This study provides an innovative process-based modelling approach using the SWAT model and shows its application to support the implementation of the European environmental policies in large river basins. The approach involves several pioneering modelling aspects: the inclusion of current management practices; an innovative calibration and validation methodology of streamflow and water quality; a sequential calibration starting from crop yields, followed by streamflow and nutrients; and the use of concentrations instead of loads in the calibration...
June 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28628308/molecular-insights-into-the-transformation-of-dissolved-organic-matter-in-landfill-leachate-concentrate-during-biodegradation-and-coagulation-processes-using-esi-ft-icr-ms
#16
Ziwen Yuan, Chen He, Quan Shi, Chunming Xu, Zhenshan Li, Chengzhai Wang, Huazhang Zhao, Jinren Ni
Landfill leachate concentrate is a type of refractory organic wastewater with high environmental risk. Identification of refractory components and insights into the molecular transformations of the organics are essential for the development of efficient treatment process. In this report, molecular compositions of dissolved organic matter (DOM) in leachate concentrate, as well as changes after anaerobic/aerobic biodegradation and coagulation with salts, were characterized using electrospray ionization (ESI) coupled with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS)...
June 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28628305/variation-in-methane-emission-rates-from-well-pads-in-four-oil-and-gas-basins-with-contrasting-production-volumes-and-compositions
#17
Anna M Robertson, Rachel Edie, Dustin Snare, Jeffrey Soltis, Robert Alexander Field, Matthew D Burkhart, Clay S Bell, Daniel Zimmerle, Shane M Murphy
Atmospheric methane emissions from active natural gas production sites in normal operation were quantified using an inverse Gaussian method (EPA's OTM 33a) in four major U.S. basins/plays: Upper Green River (UGR, Wyoming), Denver-Julesburg (DJ, Colorado), Uintah (Utah), and Fayetteville (FV, Arkansas). In DJ, Uintah, and FV, 72 - 83% of total measured emissions were from 20% of the well pads, while in UGR the highest 20% of emitting well pads only contributed 54% of total emissions. The total mass of methane emitted as a percent of gross methane produced, termed throughput-normalized methane average (TNMA) and determined by bootstrapping measurements from each basin, varied widely between basins and was (95% CI): 0...
June 19, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28628302/highly-fe3-selective-fluorescent-nanoprobe-based-on-ultra-bright-n-p-co-doped-carbon-dots-and-its-application-in-biological-samples
#18
Jingfang Shangguan, Jin Huang, Dinggeng He, Xiaoxiao He, Kemin Wang, Runzhi Ye, Xue Yang, Taiping Qing, Jinlu Tang
Measuring the levels of Fe3+ in human body has attracted considerable attention for health monitoring as it plays an essential element in many physiological processes. In this work, we reported a selective fluorescent nanoprobe for Fe3+ detection in biological samples based on ultra-bright N/P co-doped carbon dots. By employing adenosine 5'-triphosphate (ATP) as the carbon, nitrogen and phosphorus source, the N/P co-doped carbon dots could be simply prepared through hydrothermal treatment. The obtained carbon dots exhibited high quantum yields up to 43...
June 19, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28628233/spatial-and-temporal-trends-of-poly-and-perfluoroalkyl-substances-in-fish-fillets-and-water-collected-from-pool-2-of-the-upper-mississippi-river
#19
John L Newsted, Ryan Holem, Cleston Lange, Mark Ellefson, Gary Hohenstein, William Reagen, Susan Wolf
In 2011, poly- and perfluoroalkyl substances (PFASs) were analyzed in surface water and fish fillet samples taken from Pool 2 of the Upper Mississippi River, a 33-mile stretch inclusive of the Minneapolis/St. Paul, Minnesota metropolitan area. Approximately 100 each of bluegill (BGS), freshwater drum (FWD), smallmouth bass (SMB), and white bass (WHB) were sampled within the study area. Surface water samples were also collected from each of the 10 sampling reaches established for the study. Water and fillet samples were analyzed for perfluorinated carboxylic acids (PFCAs) (C4-C12), perfluorinated sulfonic acids (PFSAs) (C4, C6, and C8), and perfluorooctane sulfonamide (FOSA)...
June 19, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28627494/first-record-of-proliferative-kidney-disease-agent-tetracapsuloides-bryosalmonae-in-wild-brown-trout-and-european-grayling-in-finland
#20
Anti Vasemägi, Ilkka Nousiainen, Ari Saura, Juha-Pekka Vähä, Jorma Valjus, Ari Huusko
The myxozoan endoparasite Tetracapsuloides bryosalmonae causes temperature-driven proliferative kidney disease (PKD) in salmonid fishes. Despite the economic and ecological importance of PKD, information about the distribution of the parasite is still scarce. Here, we report for the first time the occurrence of T. bryosalmonae in wild brown trout Salmo trutta and European grayling Thymallus thymallus populations in Finland. We detected T. bryosalmonae at high prevalence in both brown trout and European grayling from the transboundary Finnish-Russian River Koutajoki system (Rivers Oulankajoki, Kuusinkijoki, Kitkajoki, Maaninkajoki, and Juumajoki) in north-eastern Finland...
June 19, 2017: Diseases of Aquatic Organisms
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