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https://www.readbyqxmd.com/read/28088544/off-site-impacts-of-wildfires-on-aquatic-systems-biomarker-responses-of-the-mosquitofish-gambusia-holbrooki
#1
Bruno Nunes, Vera Silva, Isabel Campos, Joana Luísa Pereira, Patrícia Pereira, Jan Jacob Keizer, Fernando Gonçalves, Nelson Abrantes
The number of wildfires has markedly increased in Mediterranean Europe, including in Portugal. Wildfires are environmentally concerning, not only due to the loss of biodiversity and forest area, but also as a consequence of environmental contamination by specific compounds including metals and polycyclic aromatic compounds (PAHs). These contaminants, mostly bound to ashes, can reach downstream water bodies, namely through surface runoff, being ultimately dispersed by vast areas and contacting with aquatic biota...
January 11, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28088529/effect-of-water-chemistry-on-disinfection-by-product-formation-in-the-complex-surface-water-system
#2
Rongjie Hao, Yan Zhang, Tingting Du, Li Yang, Adeyemi S Adeleye, Yao Li
The relationship between the disinfection by-products (DBPs) formed with chlorination and chloramination techniques and the water chemistry of Haihe River was compared. Samples were collected at 28 different points within the mainstream and tributaries of the river. The DBPs investigated include trihalomethanes (THMs), haloacetic acids (HAAs), haloacetonitriles (HANs), haloketones (HKs), and trichloronitromethane. THMs formed when the samples were chlorinated mostly exceeded 100 and 600 μg/L in the mainstream and tributaries and in the estuary, respectively...
December 8, 2016: Chemosphere
https://www.readbyqxmd.com/read/28088528/study-of-the-involved-sorption-mechanisms-of-cr-vi-and-cr-iii-species-onto-dried-salvinia-auriculata-biomass
#3
Aparecido Nivaldo Módenes, Ana Paula de Oliveira, Fernando R Espinoza-Quiñones, Daniela Estelita Goes Trigueros, Alexander Dimitrov Kroumov, Rosângela Bergamasco
Removal of Cr(VI) species by dried biomass of the aquatic macrophyte Salvinia auriculata was studied in order to understand the involved sorption mechanisms. Kinetic tests were carried out under the conditions such as concentration range of Cr(VI) from 50 to 250 mg L(-1) and a temperature of 30 °C. Modification of the biosorbent by the presence of Cr(VI) species was assessed by analysis of its porosity, density and infrared molecular absorption spectrum. A series of experimental approaches involving directed chemical modifications on the biosorbent surface was performed...
January 5, 2017: Chemosphere
https://www.readbyqxmd.com/read/28088380/aquatic-exercise-therapy-for-people-with-parkinson-s-disease-a-randomized-controlled-trial
#4
Louise M Carroll, Daniele Volpe, Meg E Morris, Jean Saunders, Amanda M Clifford
OBJECTIVE: To evaluate the effects of aquatic exercise therapy on gait variability and disability compared to usual care for people with Parkinson's disease (PD). DESIGN: Single-blind randomized control trial (RCT). SETTING: A community based hydrotherapy pool in Ireland. PARTICIPANTS: Twenty one individuals with PD (Hoehn-Yahr Stages I-III). INTERVENTIONS: Participants were randomly assigned to either an aquatic exercise therapy group (45 minutes, twice a week for 6 weeks) or a control group that received usual care...
January 11, 2017: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/28088239/towards-interruption-of-schistosomiasis-transmission-in-sub-saharan-africa-developing-an-appropriate-environmental-surveillance-framework-to-guide-and-to-support-end-game-interventions
#5
REVIEW
J Russell Stothard, Suzy J Campbell, Mike Y Osei-Atweneboana, Timothy Durant, Michelle C Stanton, Nana-Kwadwo Biritwum, David Rollinson, Dieudonné R Eloundou Ombede, Louis-Albert Tchuem-Tchuenté
Schistosomiasis is a waterborne parasitic disease in sub-Saharan Africa, particularly common in rural populations living in impoverished conditions. With the scale-up of preventive chemotherapy, national campaigns will transition from morbidity- to transmission-focused interventions thus formal investigation of actual or expected declines in environmental transmission is needed as 'end game' scenarios arise. Surprisingly, there are no international or national guidelines to do so in sub-Saharan Africa. Our article therefore provides an introduction to key practicalities and pitfalls in the development of an appropriate environmental surveillance framework...
January 14, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28088225/using-low-cost-drones-to-map-malaria-vector-habitats
#6
Andy Hardy, Makame Makame, Dónall Cross, Silas Majambere, Mwinyi Msellem
BACKGROUND: There is a growing awareness that if we are to achieve the ambitious goal of malaria elimination, we must compliment indoor-based vector control interventions (such as bednets and indoor spraying) with outdoor-based interventions such as larval source management (LSM). The effectiveness of LSM is limited by our capacity to identify and map mosquito aquatic habitats. This study provides a proof of concept for the use of a low-cost (< $1000) drone (DJI Phantom) for mapping water bodies in seven sites across Zanzibar including natural water bodies, irrigated and non-irrigated rice paddies, peri-urban and urban locations...
January 14, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28088098/environmental-impact-of-engineered-carbon-nanoparticles-from-releases-to-effects-on-the-aquatic-biota
#7
REVIEW
Antoine Mottier, Florence Mouchet, Éric Pinelli, Laury Gauthier, Emmanuel Flahaut
Nano-ecotoxicology is an emerging science which aims to assess the environmental effect of nanotechnologies. The development of this particular aspect of ecotoxicology was made necessary in order to evaluate the potential impact of recently produced and used materials: nanoparticles (NPs). Among all the types of NPs, carbon nanoparticles (CNPs) especially draw attention giving the increasing number of applications and integration into consumer products. However the potential impacts of CNPs in the environment remain poorly known...
January 11, 2017: Current Opinion in Biotechnology
https://www.readbyqxmd.com/read/28087491/dynamics-of-bacterial-class-bacilli-in-the-deepest-valley-lake-of-kashmir-the-manasbal-lake
#8
Sana Shafi, Azra N Kamili, Manzoor A Shah, Suhaib A Bandh, Rubiya Dar
In recognition of the importance of bacteria as ecological indicators of the aquatic systems a comprehensive and systematic analysis was carried out on Manasbal Lake, the deepest spring fed valley lake of Kashmir. The main objective envisaged was to analyze bacterial community composition (BCC) and for this purpose systematic and regular sampling of waters from ten different sampling stations, predetermined in the Lake according to differences in degree of human interference and also as zones of special ecological interests were selected...
January 10, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28087074/quantifying-loading-toxic-concentrations-and-systemic-persistence-of-chloride-in-a-contemporary-mixed-land-use-watershed-using-an-experimental-watershed-approach
#9
J A Hubbart, E Kellner, L W Hooper, S Zeiger
A nested-scale experimental watershed study was implemented to quantify loading and persistence of chloride in an urbanizing, mixed-land-use watershed. A Midwest USA (Missouri) watershed was partitioned into five sub-basins with contrasting dominant land use. Streamwater was tested for chloride concentration four days per week from October 2009 through May 2014 at each site. Monitoring sites included co-located gauging and climate stations recording variables at 30-minute intervals. Results indicate significant (p<0...
January 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28081509/in-silico-prediction-of-toxicity-of-phenols-to-tetrahymena-pyriformis-by-using-genetic-algorithm-and-decision-tree-based-modeling-approach
#10
Fatemeh Abbasitabar, Vahid Zare-Shahabadi
Risk assessment of chemicals is an important issue in environmental protection; however, there is a huge lack of experimental data for a large number of end-points. The experimental determination of toxicity of chemicals involves high costs and time-consuming process. In silico tools such as quantitative structure-toxicity relationship (QSTR) models, which are constructed on the basis of computational molecular descriptors, can predict missing data for toxic end-points for existing or even not yet synthesized chemicals...
January 2, 2017: Chemosphere
https://www.readbyqxmd.com/read/28081447/hepatic-transcriptional-responses-to-copper-in-the-three-spined-stickleback-are-affected-by-their-pollution-exposure-history
#11
Tamsyn M Uren Webster, Tim D Williams, Ioanna Katsiadaki, Anke Lange, Ceri Lewis, Janice A Shears, Charles R Tyler, Eduarda M Santos
Some fish populations inhabiting contaminated environments show evidence of increased chemical tolerance, however the mechanisms contributing to this tolerance, and whether this is heritable, are poorly understood. We investigated the responses of two populations of wild three-spined stickleback (Gasterosteus aculeatus) with different histories of contaminant exposure to an oestrogen and copper, two widespread aquatic pollutants. Male stickleback originating from two sites, the River Aire, with a history of complex pollution discharges, and Siblyback Lake, with a history of metal contamination, were depurated and then exposed to copper (46μg/L) and the synthetic oestrogen ethinyloestradiol (22ng/L)...
December 31, 2016: Aquatic Toxicology
https://www.readbyqxmd.com/read/28080908/antidog-igg-secondary-antibody-successfully-detects-igg-in-a-variety-of-aquatic-mammals
#12
Katherine Roehl, Mark Jankowski, Erik Hofmeister
Serological tests play an important role in the detection of wildlife diseases. However, while there are many commercial assays and reagents available for domestic species, there is a need to develop efficient serological assays for wildlife. In recent years, marine mammals have represented a wildlife group with emerging infectious diseases, such as influenza, brucellosis, and leptospirosis. However, with the exception of disease-agent-specific assays or functional assays, few reports describe the use of antibody detection assays in marine mammals...
December 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28080905/plasma-protein-electrophoresis-and-select-acute-phase-proteins-in-healthy-bonnethead-sharks-sphyrna-tiburo-under-managed-care
#13
Michael W Hyatt, Cara L Field, Tonya M Clauss, Kristopher L Arheart, Carolyn Cray
Preventative health care of elasmobranchs is an important but understudied field of aquatic veterinary medicine. Evaluation of inflammation through the acute phase response is a valuable tool in health assessments. To better assess the health of bonnethead sharks ( Sphyrna tiburo ) under managed care, normal reference intervals of protein electrophoresis (EPH) and the acute phase proteins, C-reactive protein (CRP) and haptoglobin (HP), were established. Blood was collected from wild caught, captive raised bonnethead sharks housed at public aquaria...
December 2016: Journal of Zoo and Wildlife Medicine: Official Publication of the American Association of Zoo Veterinarians
https://www.readbyqxmd.com/read/28079227/excited-state-properties-of-%C3%AE-carotene-analogs-incorporating-a-lactone-ring
#14
Daisuke Kosumi, Takayuki Kajikawa, Kazuhiko Sakaguchi, Shigeo Katsumura, Hideki Hashimoto
Carotenoids possessing a carbonyl group along their polyene backbone exhibit unique excited state properties due to the occurrence of intramolecular charge transfer (ICT) in the excited state. In fact, the ICT characteristics of naturally occurring carbonyl carotenoids play an essential role in the highly efficient energy transfer that proceeds in aquatic photosynthetic antenna systems. In the present study, we synthesized two short-chain polyene carotenoids incorporating a lactone ring, denoted as BL-7 and BL-8, having seven and eight conjugated double bonds (n = 7 and 8), respectively...
January 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28079122/environmental-dna-metabarcoding-reveals-local-fish-communities-in-a-species-rich-coastal-sea
#15
Satoshi Yamamoto, Reiji Masuda, Yukuto Sato, Tetsuya Sado, Hitoshi Araki, Michio Kondoh, Toshifumi Minamoto, Masaki Miya
Environmental DNA (eDNA) metabarcoding has emerged as a potentially powerful tool to assess aquatic community structures. However, the method has hitherto lacked field tests that evaluate its effectiveness and practical properties as a biodiversity monitoring tool. Here, we evaluated the ability of eDNA metabarcoding to reveal fish community structures in species-rich coastal waters. High-performance fish-universal primers and systematic spatial water sampling at 47 stations covering ~11 km(2) revealed the fish community structure at a species resolution...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28079015/chemometrics-expertise-in-the-links-between-ecotoxicity-and-physicochemical-features-of-silver-nanoparticles-environmental-aspects
#16
Miroslava A Nedyalkova, Borjana V Donkova, Vasil D Simeonov
Studies of the ecotoxicological aspects of nanomaterials in aquatic environments are scarce. Given the growing varietyof nanoparticles (NPs), along with the diversity of aquatic species and environments, the key to promoting sound risk assessment in nanoecotoxicology is understanding the mechanisms that govern the fate of NPs in aquatic environments and their behavior at the NP-biota interface. In this paper, data collected from the literature on ecotoxicological effects observed in aquatic species is discussed and analyzed using multivariate statistics techniques...
January 12, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28079012/antioxidant-peptides-from-terrestrial-and-aquatic-plants-against-cancer
#17
Marquez-Rios Enrique, Del-Toro-Sánchez Carmen Lizette
Cancer is the leading cause of morbidity and mortality worldwide. Therefore, the search for new and less aggressive treatments is currently the focus of the anticancer research. An attractive alternative for this purpose is the use of bioactive peptides from plants. Plants live everywhere on Earth, both on land and in water, and they are a major source of diverse molecules with pharmacological potential as antioxidant peptides. Hence, this review focuses on the importance of the antioxidant activity of terrestrial and aquatic plant peptides against cancer throughout several mechanisms...
January 11, 2017: Current Protein & Peptide Science
https://www.readbyqxmd.com/read/28078890/metamorphosis-affects-metal-concentrations-and-isotopic-signatures-in-a-mayfly-baetis-tricaudatus-implications-for-the-aquatic-terrestrial-transfer-of-metals
#18
Jeff S Wesner, David M Walters, Travis S Schmidt, Johanna M Kraus, Craig A Stricker, William H Clements, Ruth E Wolf
Insect metamorphosis often results in substantial chemical changes that can alter contaminant concentrations and fractionate isotopes. We exposed larval mayflies (Baetis tricaudatus) and their food (periphyton) to an aqueous zinc gradient (3-340 µg Zn/l) and measured zinc concentrations at different stages of metamorphosis: larval, subimago, and imago. We also measured changes in stable isotopes (δ15N and δ13C) in unexposed mayflies. Larval zinc concentrations were positively related to aqueous zinc, increasing 9-fold across the exposure gradient...
January 12, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28078716/incorporating-food-web-dynamics-into-ecological-restoration-a-modeling-approach-for-river-ecosystems
#19
J Ryan Bellmore, Joseph R Benjamin, Michael Newsom, Jennifer A Bountry, Daniel Dombroski
Restoration is frequently aimed at the recovery of target species, but also influences the larger food web in which these species participate. Effects of restoration on this broader network of organisms can influence target species both directly and indirectly via changes in energy flow through food webs. To help incorporate these complexities into river restoration planning we constructed a model that links river food web dynamics to in-stream physical habitat and riparian vegetation conditions. We present an application of the model to the Methow River, Washington (USA), a location of on-going restoration aimed at recovering salmon...
January 12, 2017: Ecological Applications: a Publication of the Ecological Society of America
https://www.readbyqxmd.com/read/28078684/characterization-of-protease-and-effects-of-temperature-and-salinity-on-the-biochemical-changes-during-fermentation-of-antarctic-krill
#20
Yan Fan, Lili Tian, Yong Xue, Zhaojie Li, Hu Hou, Changhu Xue
BACKGROUND: Despite their abundance, the Antarctic krill are underutilized for numerous difficulties in commercial processing. Ideally, fermentation technology can be applied to transform them into a popular condiment. Besides the exploration on protease properties, this study aimed to evaluate proteinase activities, pH of the fermentation broth, amino nitrogen, and histamine formed during fermentation at different temperatures and salt treatments. RESULTS: Even though activity of the Antarctic krill protease reached a maximum at 40 °C and pH 7, it was stable at 30 °C and pH 7-9...
January 11, 2017: Journal of the Science of Food and Agriculture
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