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https://www.readbyqxmd.com/read/28743092/polycyclic-aromatic-hydrocarbons-pahs-enrich-their-degrading-genera-and-genes-in-human-impacted-aquatic-environments
#1
Ke Yuan, Baowei Chen, Qing Qing, Shichun Zou, Xiaowei Wang, Tiangang Luan
Bacterial degradation is an important clearance pathway for organic contaminants from highly human-impacted environments. However, it is not fully understood how organic contaminants are selected for degradation by bacteria and genes in aquatic environments. In this study, PAH degrading bacterial genera and PAH-degradation-related genes (PAHDGs) in sediments collected from the Pearl River (PR), the Pearl River Estuary (PRE) and the South China Sea (SCS), among which there were distinct differences in anthropogenic impact, were analyzed using metagenomic approaches...
July 22, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28742122/main-predictors-of-periphyton-species-richness-depend-on-adherence-strategy-and-cell-size
#2
Vanessa Majewski Algarte, Tadeu Siqueira, Victor Lemes Landeiro, Liliana Rodrigues, Claudia Costa Bonecker, Luzia Cleide Rodrigues, Natália Fernanda Santana, Sidinei Magela Thomaz, Luis Mauricio Bini
Periphytic algae are important components of aquatic ecosystems. However, the factors driving periphyton species richness variation remain largely unexplored. Here, we used data from a subtropical floodplain (Upper Paraná River floodplain, Brazil) to quantify the influence of environmental variables (total suspended matter, temperature, conductivity, nutrient concentrations, hydrology, phytoplankton biomass, phytoplankton species richness, aquatic macrophyte species richness and zooplankton density) on overall periphytic algal species richness and on the richness of different algal groups defined by morphological traits (cell size and adherence strategy)...
2017: PloS One
https://www.readbyqxmd.com/read/28741204/remarks-on-the-current-quality-of-groundwater-in-vietnam
#3
EDITORIAL
Tran Le Luu
This paper reviews the current quality of groundwater in Vietnam. In Vietnam, groundwater is obtained primarily from tubewells, which have high concentrations of pollutants such as As, Fe, Mn, and NH4(+). In the areas where groundwater tests were conducted, arsenic levels ranged from 0.1-3050 μg/L, which substantially exceed the standard of 10 μg/L which has been established by the WHO. Contamination sources are distributed over a large area from the Red River Delta in the north to the Mekong River Delta in the south, putting as many as ten million people at risk of adverse health effects...
July 24, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28739105/mountains-to-the-sea-river-study-of-plastic-and-non-plastic-microfiber-pollution-in-the-northeast-usa
#4
Rachael Z Miller, Andrew J R Watts, Brooke O Winslow, Tamara S Galloway, Abigail P W Barrows
Aquatic environments are sinks for anthropogenic contamination, whether chemical or solid pollutants. Microfibers shed from clothing and other textiles contribute to this problem. These can be plastic or non-plastic origin. Our aim was to investigate the presence and distribution of both types of anthropogenic microfibers along the length of the Hudson River, USA. Surface grab samples were collected and filtered through a 0.45μm filter paper. Abundance of fibers was determined after subtraction of potential contamination...
July 21, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28738638/mixed-matrix-membranes-incorporated-with-ln-mof-for-selective-and-sensitive-detection-of-nitrofuran-antibiotics-based-on-inner-filter-effect
#5
Feng Zhang, Hua Yao, Yifan Zhao, Xing Li, Gaowei Zhang, Yangyi Yang
The detection of antibiotics is critical and challenging due to the pervasive use of antibiotics had inevitably brought some negative impacts on ecosystem and human health. Herein, we reported an anti-interfere ability enhanced luminescent sensor of lanthanide metal-organic framework (Ln-MOF) filled mixed matrix membranes (MMMs), which combining the processibility of poly(methyl methacrylate) (PMMA) polymer with Ln-MOF of {[Tb2(AIP)2(H2O)10]·(AIP)·4H2O}n (Tb-AIP, where AIP is 5-aminoisophthalate) fillers...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738564/determination-of-iodide-and-total-iodine-in-estuarine-waters-by-cathodic-stripping-voltammetry-using-a-vibrating-silver-amalgam-microwire-electrode
#6
Estrella Espada-Bellido, Zhaoshun Bi, Pascal Salaün, Constant M G van den Berg
Iodide in natural waters is an important nutrient to aquatic organisms and its determination is of relevance to marine aquaculture. For this reason it is of interest to have a simple analytical method for determination of iodide in water samples. Iodide in seawater can be determined electrochemically by cathodic stripping voltammetry (CSV) with a mercury drop electrode which has environmental drawbacks. In an attempt to minimise the use of mercury in voltammetry, a vibrating silver amalgam microwire electrode is used here for the determination by CSV of iodide speciation in natural waters including seawater...
November 1, 2017: Talanta
https://www.readbyqxmd.com/read/28738527/evaluation-of-heavy-metal-mobilization-in-creek-sediment-influence-of-rac-values-and-ambient-environmental-factors
#7
Guannan Liang, Bo Zhang, Mao Lin, Simiao Wu, Hao Hou, Jia Zhang, Guangren Qian, Xin Huang, Jizhi Zhou
The risk assessment code (RAC) is a common method for assessing heavy metal (HM) mobility and their potential health risks, based on HM total concentration and chemical speciation. In this study, both the RAC and the influence of ambient environmental factors were investigated in a river sediment system. Sixty-eight sediment samples were collected from the main river system in Shanghai, China. The total concentration and chemical speciation of Cu, Zn, Ni, Pb, Cd, Cr, As, and Hg were determined in the samples...
July 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28738506/taxonomy-or-trait-based-ecological-assessment-for-tropical-rivers-case-study-on-benthic-diatoms-in-mayotte-island-france-indian-ocean
#8
Kálmán Tapolczai, Agnès Bouchez, Csilla Stenger-Kovács, Judit Padisák, Frédéric Rimet
Diatom-based ecological quality assessment methods have been implemented and used regularly in the Water Framework Directive. These indices use the species' abundance profiles along a specific environmental gradient, which they aim to assess. However, this approach has several problematic issues including the unstable and fast-changing diatom taxonomy. The use of traits can be a solution if their responses to the environmental pressure are well-defined. Here, we developed taxonomy-based and trait-based diatom assemblage indices to assess the ecological status of riverine sites on a tropical island...
July 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28738305/contamination-characteristics-and-source-apportionment-of-methylated-pahs-in-agricultural-soils-from-yangtze-river-delta-china
#9
Weixiao Chen, Xinyi Wu, Haiyun Zhang, Jianteng Sun, Wenxin Liu, Lizhong Zhu, Xiangdong Li, Daniel C W Tsang, Shu Tao, Xilong Wang
Alkylated PAHs (APAHs) have been shown to be more toxic and persistent than their non-alkylated parent compounds. However, little is known about the extent of soil contamination by these pollutants. To help understand agricultural soil pollution by these compounds at a regional scale, a total of 18 methylated PAHs (MPAHs, a major class of APAHs) in 243 soil samples were analyzed. These soil samples were collected from 11 sites in the Yangtze River Delta (YRD) region, a representative fast developing area in China...
July 21, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28738200/global-distribution-of-dissolved-organic-matter-along-the-aquatic-continuum-across-rivers-lakes-and-oceans
#10
Philippe Massicotte, Eero Asmala, Colin Stedmon, Stiig Markager
Based on an extensive literature survey containing more than 12,000 paired measurements of dissolved organic carbon (DOC) concentrations and absorption of chromophoric dissolved organic matter (CDOM) distributed over four continents and seven oceans, we described the global distribution and transformation of dissolved organic matter (DOM) along the aquatic continuum across rivers and lakes to oceans. A strong log-linear relationship (R(2)=0.92) between DOC concentration and CDOM absorption at 350nm was observed at a global scale, but was found to be ecosystem-dependent at local and regional scales...
July 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28738173/simulating-the-meteorology-and-pm10-concentrations-in-arizona-dust-storms-with-the-weather-research-and-forecasting-model-with-chemistry-wrf-chem
#11
Peter Hyde, Alex Mahalov, Jialun Li
Nine dust storms in south-central Arizona, USA were simulated with the Weather Research and Forecasting with Chemistry model (WRF-Chem) at 2-km resolution. The windblown dust emission algorithm was the Air Force Weather Agency model. In comparison with ground-based PM10 observations, the model unevenly reproduces the dust storm events. The model adequately estimates the location and timing of the events, but it is unable to precisely replicate the magnitude and timing of the elevated hourly concentrations of particles 10 microns and smaller ([PM10])...
July 24, 2017: Journal of the Air & Waste Management Association
https://www.readbyqxmd.com/read/28738089/a-random-forest-approach-to-predict-the-spatial-distribution-of-sediment-pollution-in-an-estuarine-system
#12
Eric S Walsh, Betty J Kreakie, Mark G Cantwell, Diane Nacci
Modeling the magnitude and distribution of sediment-bound pollutants in estuaries is often limited by incomplete knowledge of the site and inadequate sample density. To address these modeling limitations, a decision-support tool framework was conceived that predicts sediment contamination from the sub-estuary to broader estuary extent. For this study, a Random Forest (RF) model was implemented to predict the distribution of a model contaminant, triclosan (5-chloro-2-(2,4-dichlorophenoxy)phenol) (TCS), in Narragansett Bay, Rhode Island, USA...
2017: PloS One
https://www.readbyqxmd.com/read/28737961/metacercaria-infection-status-of-fishborne-zoonotic-trematodes-except-for-clonorchis-sinensis-in-fish-from-the-heilongjiang-province-china
#13
Jian-Hua Qiu, Ying Zhang, Xiao-Xuan Zhang, Yuan Gao, Qi Li, Qiao-Cheng Chang, Chun-Ren Wang
To investigate the metacercarial infections of fishborne zoonotic trematodes (FZT), a total of 6815 freshwater fish (in representing 13 species of 5 families) were collected from Songhua river (n = 2636), Nenjiang river (n = 1935), Mudanjiang river (n = 301), and other lakes or ponds (n = 1943) in 36 representative regions in Heilongjiang Province, China, from August 2012 to December 2015. Metacercariae of four FZT species, that is, Clonorchis sinensis, Metorchis orientalis, Isthmiophora hortensis, and Metagonimus yokogawai, metacercariae were detected in the examination by the artificial digestion method...
July 24, 2017: Foodborne Pathogens and Disease
https://www.readbyqxmd.com/read/28737680/mapping-quantitative-trait-loci-qtl-for-resistance-to-late-blight-in-tomato
#14
Dilip R Panthee, Ann Piotrowski, Ragy Ibrahem
Late blight caused by Phytophthora infestans (Montagne, Bary) is a devastating disease of tomato worldwide. There are three known major genes, Ph-1, Ph-2, and Ph-3, conferring resistance to late blight. In addition to these three genes, it is also believed that there are additional factors or quantitative trait loci (QTL) conferring resistance to late blight. Precise molecular mapping of all those major genes and potential QTL is important in the development of suitable molecular markers and hence, marker-assisted selection (MAS)...
July 22, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28737160/health-and-environmental-risk-assessment-project-for-bottlenose-dolphins-tursiops-truncatus-from-the-southeastern-usa-ii-environmental-aspects
#15
REVIEW
John S Reif, Adam M Schaefer, Gregory D Bossart, Patricia A Fair
Bottlenose dolphins Tursiops truncatus are the most common apex predators found in coastal and estuarine ecosystems along the southeastern coast of the USA, where these animals are exposed to multiple chemical pollutants and microbial agents. In this review, we summarize the results of investigations of environmental exposures evaluated in 360 free-ranging dolphins between 2003 and 2015. Bottlenose dolphins inhabiting the Indian River Lagoon, Florida (IRL, n = 246), and coastal waters of Charleston, South Carolina (CHS, n = 114), were captured, given comprehensive health examinations, and released as part of a multidisciplinary and multi-institutional study of individual and population health...
July 24, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28737159/health-and-environmental-risk-assessment-project-for-bottlenose-dolphins-tursiops-truncatus-from-the-southeastern-usa-i-infectious-diseases
#16
REVIEW
Gregory D Bossart, Patricia Fair, Adam M Schaefer, John S Reif
From 2003 to 2015, 360 free-ranging Atlantic bottlenose dolphins Tursiops truncatus inhabiting the Indian River Lagoon (IRL, n = 246), Florida, and coastal waters of Charleston (CHS, n = 114), South Carolina, USA, were captured, given comprehensive health examinations, and released as part of a multidisciplinary and multi-institutional study of individual and population health. The aim of this review is to summarize the substantial health data generated by this study and to examine morbidity between capture sites and over time...
July 24, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28737155/dawestrema-cycloancistrium-monogenea-from-the-head-pores-of-arapaimas
#17
Cláudia Portes Santos, Maralina Torres da Silva, Franti Ek Moravec
Arapaima gigas is one of the main cultured fish species in South America, and monogenean parasites of this species cause large economic losses to fish farmers. During surveys of the parasites of cultured arapaimas from Mexiana Island in the Amazon River Delta, Rio Branco, in northwestern Brazilian Amazonia, and Yurimaguas, Peru, the monogenean Dawestrema cycloancistrium was found in the gills of A. gigas as well as in previously unreported sites, i.e. the head pores and chambers. The aim of this study was to investigate the transmission route of this parasite and its geographical distribution as well as to describe its morphology as observed by light and confocal imaging...
July 24, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28736047/health-risk-assessment-as-an-approach-to-manage-an-old-landfill-and-to-propose-integrated-solid-waste-treatment-a-case-study-in-italy
#18
O Paladino, M Massabò
The aim of the present paper is to show how an approach based on human health risk analysis can be used as a decisional tool for the evaluation of impacts on population and for deciding between different waste treatment processes. The situation in which the increasing production of solid wastes cannot be confined in the old existing Municipal Solid Waste landfill (settled in Genoa, Liguria Region, Italy) is used as a case study. Risk assessment for human health due to air, surface water, groundwater and soil contamination is performed in different scenarios for the old landfill and compared with alternative Waste-to-Energy management solutions that consider thermal treatment by gasification of the total waste or gasification of the dry fraction coupled with anaerobic digestion of the wet fraction, plus biogas combustion with or without sludge and bottom ash/slag disposal in the old landfill...
July 20, 2017: Waste Management
https://www.readbyqxmd.com/read/28735710/comparison-of-two-microextraction-methods-based-on-solidification-of-floating-organic-droplet-for-the-determination-of-multiclass-analytes-in-river-water-samples-by-liquid-chromatography-tandem-mass-spectrometry-using-central-composite-design
#19
Ankita Asati, G N V Satyanarayana, Devendra K Patel
Two low density organic solvents based liquid-liquid microextraction methods, namely Vortex assisted liquid-liquid microextraction based on solidification of floating organic droplet (VALLME-SFO) and Dispersive liquid-liquid microextraction based on solidification of floating organic droplet(DLLME-SFO) have been compared for the determination of multiclass analytes (pesticides, plasticizers, pharmaceuticals and personal care products) in river water samples by using liquid chromatography tandem mass spectrometry (LC-MS/MS)...
July 15, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28735584/genomic-differentiation-between-swamp-and-river-buffalo-using-a-cattle-high-density-single-nucleotide-polymorphisms-panel
#20
L Pérez-Pardal, S Chen, V Costa, X Liu, J Carvalheira, A Beja-Pereira
Buffalo (Bubalus bubalis) is an important livestock species in many tropical and subtropical regions. In recent decades, the interest in buffalo's milk have expanded and intensive buffalo farms start to emerge. However, breeding programs and population genetics information for this species is scarce or inexistent. The present study aims to test the suitability of the commercial high-density single nucleotide polymorphisms (SNP) genotyping panel, the Illumina BovineHD BeadChip, to estimate population genetics parameters, pedigree control and identification of common variants in major production candidate genes...
July 24, 2017: Animal: An International Journal of Animal Bioscience
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