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https://www.readbyqxmd.com/read/28535595/enhancement-of-carbon-and-nitrogen-removal-by-helophytes-along-subsurface-water-flowpaths-receiving-treated-wastewater
#1
Miquel Ribot, Susana Bernal, Myrto Nikolakopoulou, Timothy N Vaessen, Joaquín Cochero, Esperança Gacia, Albert Sorolla, Alba Argerich, Francesc Sabater, Manel Isnard, Eugènia Martí
Wastewater treatment plant (WWTP) effluents are sources of dissolved organic carbon (DOC) and inorganic nitrogen (DIN) to receiving streams, which can eventually become saturated by excess of DIN. Aquatic plants (i.e., helophytes) can modify subsurface water flowpaths as well as assimilate nutrients and enhance microbial activity in the rhizosphere, yet their ability to increase DIN transformation and removal in WWTP-influenced streams is poorly understood. We examined the influence of helophytes on DIN removal along subsurface water flowpaths and how this was associated with DOC removal and labile C availability...
May 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28535592/stream-salinization-and-fungal-mediated-leaf-decomposition-a-microcosm-study
#2
Cristina Canhoto, Sara Simões, Ana Lúcia Gonçalves, Lúcia Guilhermino, Felix Bärlocher
Salinization is of major global concern due to its effect on stream biota, and ecosystem functions and services. In small streams, litter decomposition is a key ecosystem-level process driven by decomposers, mainly fungi (aquatic hyphomycetes), which link litter and invertebrates. Here we assessed the effects of an environmentally relevant range of salt additions (0, 2, 4, 8, 16gL(-1) NaCl) on (1) fungal growth and species-specific reproductive output and (2) fungal mediated-decomposition of Quercus robur leaves...
May 19, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28535480/ozonation-of-the-oxybenzone-octinoxate-and-octocrylene-uv-filters-reaction-kinetics-absorbance-characteristics-and-transformation-products
#3
Zachary R Hopkins, Sebastian Snowberger, Lee Blaney
UV-filters (UVFs) are active ingredients in personal care products that protect skin from exposure to UV light. Environmentally-relevant concentrations of UVFs have recently been linked to toxicity in aquatic organisms, necessitating research into improved UVF removal in water/wastewater treatment. Here, we investigated ozonation of the three most commonly employed UVFs: octinoxate (OMC), octocrylene (OC), and oxybenzone (OXY). Specific second-order rate constants for UVF reaction with ozone were identified as follows: OMC, 5...
May 10, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28535358/effectiveness-of-peers-in-delivering-programs-or-motivating-older-people-to-increase-their-participation-in-physical-activity-systematic-review-and-meta-analysis
#4
Elissa Burton, Kaela Farrier, Keith D Hill, Jim Codde, Phil Airey, Anne-Marie Hill
The objective of this systematic review and meta-analysis was to evaluate the effectiveness of peers to deliver programs or encourage older people to be physically active and improve physical outcomes. Peer reviewed articles published in English between January 1976 and June 2016, retrieved from six databases according to the predefined inclusion criteria were included. Where possible results were pooled and meta-analyses conducted. Eighteen articles were included in the review, a total of 3,492 intervention participants, average age 66...
May 23, 2017: Journal of Sports Sciences
https://www.readbyqxmd.com/read/28535200/the-draft-genome-of-blunt-snout-bream-megalobrama-amblycephala-reveals-the-development-of-intermuscular-bone-and-adaptation-to-herbivorous-diet
#5
Han Liu, Chunhai Chen, Zexia Gao, Jiumeng Min, Yongming Gu, Jianbo Jian, Xiewu Jiang, Huimin Cai, Ingo Ebersberger, Meng Xu, Xinhui Zhang, Jianwei Chen, Wei Luo, Boxiang Chen, Junhui Chen, Hong Liu, Jiang Li, Ruifang Lai, Mingzhou Bai, Jin Wei, Shaokui Yi, Huanling Wang, Xiaojuan Cao, Xiaoyun Zhou, Yuhua Zhao, Kaijian Wei, Ruibin Yang, Bingnan Liu, Shancen Zhao, Xiaodong Fang, Manfred Schartl, Xueqiao Qian, Weimin Wang
Background: The blunt snout bream, Megalobrama amblycephala , is the economically most important cyprinid fish species. As an herbivore, it can be grown by eco-friendly and resource-conserving aquaculture. However, the large number of intermuscular bones in the trunk musculature is adverse to fish meat processing and consumption. Results: As a first towards optimizing this aquatic livestock, we present a 1.116-Gb draft genome of M. amblycephala , with 779.54 Mb anchored on 24 linkage groups...
May 23, 2017: GigaScience
https://www.readbyqxmd.com/read/28534578/photolysis-and-cellular-toxicities-of-the-organic-ultraviolet-filter-chemical-octyl-methoxycinnamate-and-its-photoproducts
#6
Hannah V Stein, Courtney J Berg, Jessica N Maung, Lauren E O'Connor, Alexandra E Pagano, Laura A MacManus-Spencer, Margot G Paulick
Organic ultraviolet filter chemicals (UVFCs) are the active ingredients used in many sunscreens to protect the skin from UV light; these chemicals have been detected in numerous aquatic environments leading to concerns about how they might affect aquatic organisms and humans. One commonly used organic UVFC is octyl methoxycinnamate (OMC), better known by its commercial name, octinoxate. Upon exposure to UV light, OMC degrades rapidly, forming numerous photoproducts, some of which have been previously identified...
May 23, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/28534306/assessment-of-water-quality-using-multivariate-techniques-in-river-sosiani-kenya
#7
A O Achieng', P O Raburu, E C Kipkorir, S O Ngodhe, K O Obiero, J Ani-Sabwa
Multivariate techniques can infer intrinsic characteristics of complex data by generating correlation, similarity, dissimilarity, and covariance vector matrix to ascertain their relationships. The study evaluated the effect of anthropogenic activities by analyzing selected physicochemical water quality parameters (WQP) as indicators of pollution in River Sosiani, located in western Kenya, at six stations from August 2012 to February 2013 (Aug-Oct ≡ wet season, Nov-Feb ≡ Dry season). Temperature, pH, Total Dissolved Solids (TDS), conductivity, and Dissolved Oxygen (DO) were measured in situ while Total Phosphorus (TP), Total Organic Nitrogen (TON), and Biologial Oxygen Demand (BOD) were measured in vitro using standard methods...
June 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28534072/genotoxic-assessment-of-some-inorganic-compounds-in-desert-pupfish-cyprinodon-macularius-in-the-evaporation-pond-from-a-geothermal-plant
#8
Miguel Flores-Galván, Evarista Arellano-García, Gorgonio Ruiz-Campos, Luis Walter Daesslé
The frequency of micro nucleated erythrocytes in peripheral blood of the desert pupfish (Cyprinodon macularius) from a geothermal effluent pond is determined and compared to organisms kept in an aquarium. The frequency of micronucleated erythrocytes found in pupfish from the geothermal pond is 2.75 (±2.09) and only 0.44 (±0.52) in captivity organisms. Dissolved As in the ponds doubles the 340 µg L(-1) US-EPA acute quality criteria for aquatic life and Hg equals the 1.77 µg L(-1) chronic criteria. The organisms with high MNE also have significantly high Se, As and Hg concentrations in muscle and liver...
May 22, 2017: Bulletin of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28533950/are-invasive-populations-characterized-by-a-broader-diet-than-native-populations
#9
Julien Courant, Solveig Vogt, Raquel Marques, John Measey, Jean Secondi, Rui Rebelo, André De Villiers, Flora Ihlow, Charlotte De Busschere, Thierry Backeljau, Dennis Rödder, Anthony Herrel
BACKGROUND: Invasive species are among the most significant threats to biodiversity. The diet of invasive animal populations is a crucial factor that must be considered in the context of biological invasions. A broad dietary spectrum is a frequently cited characteristic of invasive species, allowing them to thrive in a wide range of environments. Therefore, empirical studies comparing diet in invasive and native populations are necessary to understand dietary requirements, dietary flexibility, and the associated impacts of invasive species...
2017: PeerJ
https://www.readbyqxmd.com/read/28533795/a-kasp-genotyping-method-to-identify-northern-watermilfoil-eurasian-watermilfoil-and-their-interspecific-hybrids
#10
Eric L Patterson, Margaret B Fleming, Kallie C Kessler, Scott J Nissen, Todd A Gaines
The invasive aquatic plant Eurasian watermilfoil (Myriophyllum spicatum L.) can hybridize with the related North American native species northern watermilfoil (M. sibiricum Kom.). Hybrid watermilfoil (M. spicatum × M. sibiricum) populations have higher fitness and reduced sensitivity to some commonly used aquatic herbicides, making management more difficult. There is growing concern that management practices using herbicides in lakes with mixed populations of watermilfoil species may further select for hybrid individuals due to the difference in herbicide sensitivity...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28533562/accelerating-tropicalization-and-the-transformation-of-temperate-seagrass-meadows
#11
Glenn A Hyndes, Kenneth L Heck, Adriana Vergés, Euan S Harvey, Gary A Kendrick, Paul S Lavery, Kathryn McMahon, Robert J Orth, Alan Pearce, Mathew Vanderklift, Thomas Wernberg, Scott Whiting, Shaun Wilson
Climate-driven changes are altering production and functioning of biotic assemblages in terrestrial and aquatic environments. In temperate coastal waters, rising sea temperatures, warm water anomalies and poleward shifts in the distribution of tropical herbivores have had a detrimental effect on algal forests. We develop generalized scenarios of this form of tropicalization and its potential effects on the structure and functioning of globally significant and threatened seagrass ecosystems, through poleward shifts in tropical seagrasses and herbivores...
November 1, 2016: Bioscience
https://www.readbyqxmd.com/read/28532904/cr-in-dredged-marine-sediments-anthropogenic-enrichment-bioavailability-and-potential-adverse-effects
#12
Fabienne Baraud, Lydia Leleyter, Mélanie Lemoine, Hakim Hamdoun
This study focuses on chromium detected in 13 harbor sediments dredged across the English Channel. The total concentrations of Cr range from 5 to 61mgkg(-1), which reveal no or low enrichment for 12 of the 13 samples, according the enrichment factor (EF) calculations. Sequential extraction procedure was applied to determine the mineralogical speciation of Cr, in order to assess its potential (re)mobilization to the aquatic environment. Cr is mainly associated to the residual fraction, then distributed in the oxydizable and reducible fractions...
May 19, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28532167/how-the-marine-biotoxins-affect-human-health
#13
Silvia Morabito, Serena Silvestro, Caterina Faggio
Several marine microalgae produce dangerous toxins very damaging to human health, aquatic ecosystems and coastal resources. These Harmful Algal Blooms (HABs) in recent decades seem greatly increased regarding frequency, severity and biogeographical level, causing serious health risks as a consequence of the consumption of contaminated seafood. Toxins can cause various clinically described syndromes, characterised by a wide range of symptoms: amnesic (ASP), diarrhoetic (DSP), azaspirazid (AZP), neurotoxic (NSP) and paralytic (PSP) shellfish poisonings and ciguatera fish poisoning...
May 22, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28531969/biogeographical-factors-affecting-the-distribution-of-stream-salamanders-on-the-cumberland-plateau-usa
#14
P R Gould, K K Cecala, S S Drukker, B A McKenzie, C Van de Ven
Geophysical and climate conditions play an important role in the distribution of organisms at both fine and broad scales. Headwater streams integrate changes at broad geographical scales and serve as important regions of nutrient processing and support high biodiversity. Stream salamanders are important members of headwater aquatic communities as both predators and prey. Combined with their biphasic life histories and physiological requirements, stream amphibians may serve as indicators for headwater stream conditions...
May 18, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28531955/influence-of-sediment-chemistry-and-sediment-toxicity-on-macroinvertebrate-communities-across-99-wadable-streams-of-the-midwestern-usa
#15
Patrick W Moran, Lisa H Nowell, Nile E Kemble, Barbara J Mahler, Ian R Waite, Peter C Van Metre
Simultaneous assessment of sediment chemistry, sediment toxicity, and macroinvertebrate communities can provide multiple lines of evidence when investigating relations between sediment contaminants and ecological degradation. These three measures were evaluated at 99 wadable stream sites across 11 states in the Midwestern United States during the summer of 2013 to assess sediment pollution across a large agricultural landscape. This evaluation considers an extensive suite of sediment chemistry totaling 274 analytes (polycyclic aromatic hydrocarbons, organochlorine compounds, polychlorinated biphenyls, polybrominated diphenyl ethers, trace elements, and current-use pesticides) and a mixture assessment based on the ratios of detected compounds to available effects-based benchmarks...
May 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28531948/an-alternative-approach-to-risk-rank-chemicals-on-the-threat-they-pose-to-the-aquatic-environment
#16
Andrew C Johnson, Rachel L Donnachie, John P Sumpter, Monika D Jürgens, Claudia Moeckel, M Gloria Pereira
This work presents a new and unbiased method of risk ranking chemicals based on the threat they pose to the aquatic environment. The study ranked 12 metals, 23 pesticides, 11 other persistent organic pollutants (POPs), 13 pharmaceuticals, 10 surfactants and similar compounds and 2 nanoparticles (total of 71) of concern against one another by comparing their median UK river water and median ecotoxicity effect concentrations. To complement this, by giving an assessment on potential wildlife impacts, risk ranking was also carried out by comparing the lowest 10th percentile of the effects data with the highest 90th percentile of the exposure data...
May 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28531838/antimicrobial-agents-triclosan-chloroxylenol-methylisothiazolinone-and-borax-used-in-cleaning-had-genotoxic-and-histopathologic-effects-on-rainbow-trout
#17
Erol Capkin, Tuna Ozcelep, Sevki Kayis, Ilhan Altinok
Triclosan (TRC), chloroxylenol (PCMX) and methylisothiazolinone (MIT) have been commonly used as an antimicrobial in soaps while borax (BRX) is used in household cleaning. After using these chemicals, they are washed down drains and getting into the aquatic ecosystem in which they may affect aquatic living organisms. In the present study, the chronic effects of TRC, PCMX, MIT and BRX on genotoxicity, gene expression and histopathology of rainbow trout (Oncorhynchus mykiss) were evaluated for 40 days under semi static condition...
May 15, 2017: Chemosphere
https://www.readbyqxmd.com/read/28531797/a-macrophyte-bioassessment-approach-linking-taxon-specific-tolerance-and-abundance-in-north-temperate-lakes
#18
Alison Mikulyuk, Martha Barton, Jennifer Hauxwell, Catherine Hein, Ellen Kujawa, Kristi Minahan, Michelle E Nault, Daniel L Oele, Kelly I Wagner
Bioassessment methods are critically needed to evaluate and monitor lake ecological condition. Aquatic macrophytes are good candidate indicators, but few lake bioassessment methods developed in North America use them. The few macrophyte bioassessment methods that do exist suffer from problems related to subjectivity and discernibility along disturbance gradients. We developed and tested a bioassessment approach for 462 north temperate lakes. The approach links macrophyte abundance to lake ecological condition via estimates of taxon-specific abundance-weighted tolerance to anthropogenic disturbance...
May 19, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28531658/co-plantation-of-aquatic-macrophytes-typha-angustifolia-and-paspalum-scrobiculatum-for-effective-treatment-of-textile-industry-effluent
#19
Vishal V Chandanshive, Niraj R Rane, Asif S Tamboli, Avinash R Gholave, Rahul V Khandare, Sanjay P Govindwar
Field treatment of textile industry effluent was carried out in constructed drenches (91.4m×1.2m×0.6m; 65.8m(3)) planted independently with Typha angustifolia, Paspalum scrobiculatum and their co-plantation (consortium-TP). The in situ treatment of effluent by T. angustifolia, P. scrobiculatum and consortium-TP was found to decrease ADMI color value by 62, 59 and 76%, COD by 65, 63 and 70%, BOD by 68, 63 and 75%, TDS by 45, 39 and 57%, and TSS by 35, 31 and 47%, respectively within 96h. Heavy metals such as arsenic, cadmium, chromium and lead were also removed up to 28-77% after phytoremediation...
May 12, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28531557/characterization-of-dissolved-organic-carbon-leached-from-a-woodchip-bioreactor
#20
Ibrahim Abusallout, Guanghui Hua
Woodchip bioreactors are increasingly being applied to remove nitrate from agricultural subsurface drainage. However, dissolved organic carbon (DOC) released from woodchips may negatively affect the aquatic ecosystems and drinking water supplies. The objective of this study was to evaluate the leaching characteristics, disinfection byproduct (DBP) formation potentials, and treatability of DOC derived from a laboratory woodchip bioreactor. Initial flush of woodchips resulted in the release of high organic content from woodchips...
May 13, 2017: Chemosphere
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