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Archives of Environmental Contamination and Toxicology

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https://www.readbyqxmd.com/read/28102440/thyroid-hormones-retinol-and-clinical-parameters-in-relation-to-mercury-and-organohalogen-contaminants-in-great-blue-heron-ardea-herodias-nestlings-from-the-st-lawrence-river-qu%C3%A3-bec-canada
#1
Louise Champoux, Monique Boily, Guy Fitzgerald
The exposure and effects of persistent environmental contaminants were investigated in great blue heron (Ardea herodias) nestlings sampled in 2001, 2002, 2006, and 2007 in freshwater and estuarine heronries along the St. Lawrence River, Québec (Canada). Biomarkers (retinoids, thyroid hormones, and clinical parameters) and contaminants (organochlorine contaminants, polychlorinated biphenyls (PCBs), brominated flame retardants (BFRs), and mercury (Hg)) were analyzed in blood, and Hg was analyzed in feathers (generally 9 nestlings per colony and 4 colonies per year)...
January 19, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28074227/heavy-metals-in-liver-and-brain-of-waterfowl-from-the-evros-delta-greece
#2
Maria Aloupi, Asimina Karagianni, Savas Kazantzidis, Triantaphyllos Akriotis
The concentrations of six heavy metals (cadmium [Cd], chromium [Cr], copper [Cu], manganese [Mn], lead [Pb], and zinc [Zn]) were determined in liver and brain of nine species of waterfowl from the Evros Delta, one of the most important wetlands in Greece, to assess metal contamination and potential risk to waterfowl. Significant differences among species were found for hepatic Cr, Cu, Pb, and Zn; the highest levels of all metals were found in liver of mute swans. Cd increased significantly with age in both organs of wigeon; some differences were also observed between males and females of the same species...
January 10, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28064370/changes-in-sport-fish-mercury-concentrations-from-food-web-shifts-suggest-partial-decoupling-from-atmospheric-deposition-in-two-colorado-reservoirs
#3
Brian A Wolff, Brett M Johnson, Jesse M Lepak
Partial decoupling of mercury (Hg) loading and observed Hg concentrations ([Hg]) in biotic and abiotic samples has been documented in aquatic systems. We studied two Colorado reservoirs to test whether shifts in prey for sport fish would lead to changes in [Hg] independent of external atmospheric Hg deposition. We compared sport fish total mercury concentrations ([T-Hg]) and macroinvertebrate (chironomids and crayfish) methylmercury concentrations ([MeHg]) before and after food web shifts occurred in both reservoirs...
January 7, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28054105/comparative-developmental-toxicity-of-desalination-brine-and-sulfate-dominated-saltwater-in-a-euryhaline-fish
#4
Allison Kupsco, Rafid Sikder, Daniel Schlenk
Desalination is a promising sustainable solution to meet growing water needs of cities across the United States. However, the environmental impacts of the resulting filtrate (brine) discharged to surface water need to be evaluated before large-scale desalination can be successful in the United States. Developing fish are especially sensitive to changes in salinity and varying ionic composition. Limited research is available on the impacts of hypersalinity on chronic vertebrate embryonic development, particularly on sublethal effects...
January 4, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28050624/toxicity-assessment-of-binary-metal-mixtures-copper-zinc-to-nitrification-in-soilless-culture-with-the-extended-biotic-ligand-model
#5
Aiju Liu, JinXin Li, Menghong Li, Xiao Yin Niu, Jun Wang
Metals are always found in the environment as mixtures rather than as solitary elements. Only a limited number of studies have developed appropriate models that incorporate bioavailability to estimate the toxicity of heavy-metal mixtures. In the present study, we explored the applicability of two extended biotic ligand model (BLM) approaches-BLM-f mix and BLM-toxicity unit (TU)-to predict and interpret mixture toxicity with the assumption that interactions between metal ions obey the BLM theory. Exposure assays of single and mixed metals were performed with inoculums of an ammonia-oxidizing bacterium SD5 isolated from soil...
January 3, 2017: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/28040852/testing-local-adaptation-in-five-populations-of-hyalella-azteca-in-northern-alberta-s-oil-sands-region
#6
Steven R Beery, Patrick T Gauthier, Gregory G Pyle
Canada's oil sands hold the third largest petroleum reserves worldwide and have experienced rapid economic growth. The oil sands region provides an ideal location for studying local adaptations through reciprocal transplant (RT) because populations within the region have been historically exposed to naturally occurring bitumen. Our objectives were to (1) determine if Hyalella azteca from habitats within the oil sands region exhibited increased tolerance to constituents associated with industrial bitumen extraction compared with H...
December 31, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27999877/influence-of-road-proximity-on-the-concentrations-of-heavy-metals-in-korean-urban-agricultural-soils-and-crops
#7
Hyuck Soo Kim, Kwon-Rae Kim, Won-Il Kim, Gary Owens, Kye-Hoon Kim
The urban agricultural (UA) environment near active roadways can be degraded by traffic-related particles (i.e., exhaust gases and road dust), which may contain heavy metals. The current study investigated changes in heavy-metal [cadmium (Cd), copper (Cu), chromium (Cr) nickel (Ni), lead (Pb) and zinc (Zn)] concentrations in soils located near highly trafficked roads in Korea and the subsequent uptake of these metals by Chinese cabbage. Heavy-metal plant concentrations were determined in both washed and unwashed plant leaves to determine whether foliar deposition played any role in plant metal uptake...
December 20, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27990606/geochemical-assessment-of-trace-element-pollution-in-surface-sediments-from-the-georges-river-southern-sydney-australia
#8
Yasir M Alyazichi, Brian G Jones, Errol McLean, Joel Pease, Heidi Brown
Measurement of elevated trace elements is an important component of environmental assessment and management of estuarine marine sediments in systems adjacent to concentrated human activity. The present study surveys the estuarine sediments in selected tributary bays, creeks, and the upper segments of the Georges River system, NSW, Australia, which flows into the Tasman Sea through Botany Bay. A total of 146 surface sediment samples were analysed by X-ray fluorescence. Potential pollution of sediments was evaluated using potential load index, modified degree of contamination, and potential ecological risk index...
December 18, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27990605/profiling-of-selected-functional-metabolites-in-the-central-nervous-system-of-marine-medaka-oryzias-melastigma-for-environmental-neurotoxicological-assessments
#9
Elva Ngai-Yu Lei, Man-Shan Yau, Chi-Chung Yeung, Margaret B Murphy, Ka-Leung Wong, Michael Hon-Wah Lam
The simultaneous profiling of 43 functional metabolites in the brain of the small model vertebrate organism, marine medaka (Oryzais melastigma), has been accomplished via dansyl chloride derivatization and LC-MS/MS quantification. This technique was applied to examine effects of 2,2',4,4'-tetrabromodiphenyl ether (BDE-47), one of the most abundant polybrominated diphenyl ether flame retardants in the natural environment, on the central nervous system (CNS) of vertebrates. The model teleosts were fed with bioencapsulated Artemia nauplii for up to 21 days...
December 18, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27986996/the-degree-of-impairment-of-foraging-in-crayfish-orconectes-virilis-due-to-insecticide-exposure-is-dependent-upon-turbulence-dispersion
#10
Timothy S Ludington, Paul A Moore
As toxicants move into aquatic systems, the concentration at any point in space or time is heavily influenced by the flow dynamics. The dispersion of these chemicals creates a toxicant concentration that fluctuates widely in time and is highly dependent on the spatial heterogeneity of turbulence. Despite this knowledge on the movement of toxicants in natural systems, most ecotoxicological studies use static exposure paradigms that ignore the spatio-temporal dynamics of toxicants in aquatic systems. Although recent studies have begun to use pulsed paradigms in an attempt to mimic natural conditions, the heterogeneity of real concentrations in natural systems rarely is considered for use in these tests...
December 16, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27986995/the-effect-of-atrazine-on-louisiana-gulf-coast-estuarine-phytoplankton
#11
Alexis V Starr, Sibel Bargu, Kanchan Maiti, Ronald D DeLaune
Pesticides may enter water bodies in areas with a high proportion of agricultural land use through surface runoff, groundwater discharge, and erosion and thus negatively impact nontarget aquatic organisms. The herbicide atrazine is used extensively throughout the Midwest and enters the Mississippi River through surface runoff and groundwater discharge. The purpose of this study was to determine the extent of atrazine contamination in Louisiana's estuaries from Mississippi River water under different flow and nutrient regimes (spring and summer) and its effect on the biomass and oxygen production of the local phytoplankton community...
December 16, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27933359/raccoons-procyon-lotor-as-sentinels-of-trace-element-contamination-and-physiological-effects-of-exposure-to-coal-fly-ash
#12
Felipe Hernández, Ricki E Oldenkamp, Sarah Webster, James C Beasley, Lisa L Farina, Samantha M Wisely
Anthropogenic pollutants disrupt global biodiversity, and terrestrial sentinels of pollution can provide a warning system for ecosystem-wide contamination. This study sought to assess whether raccoons (Procyon lotor) are sentinels of local exposure to trace element contaminants at a coal fly ash site and whether exposure resulted in health impairment or changes in the intestinal helminth communities. We compared trace element accumulation and the impact on health responses and intestinal helminth communities of raccoons inhabiting contaminated and reference sites of the U...
December 8, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27904922/impacts-of-sediment-organic-matter-content-and-ph-on-ecotoxicity-of-coexposure-of-tio2-nanoparticles-and-cadmium-to-freshwater-snails-bellamya-aeruginosa
#13
Taowu Ma, Meng Wang, Shuangjiao Gong, Bin Tian
The environmental factors are expected to affect the ecotoxicity of heavy metals in the presence of engineered nanoparticles (NPs) in aquatic ecosystems. However, in sediment scenario, little is known regarding their impacts on the ecotoxicity of co-exposure of sediment-associated heavy metals and NPs. This study evaluated the impacts of different levels of organic matter (OM) (4.8-11.6%) and pH (6-9) on the ecotoxicological effects of co-exposure of sediment-associated titanium dioxide nanoparticles (TiO2-NPs) and cadmium (Cd) to a freshwater gastropod Bellamya aeruginosa...
November 30, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27900424/long-term-geochemical-evolution-of-lithogenic-versus-anthropogenic-distribution-of-macro-and-trace-elements-in-household-attic-dust
#14
Biljana Balabanova, Trajče Stafilov, Robert Šajn, Claudiu Tănăselia
Attic dusts were examined as historical archives of anthropogenic emissions, with the goal of elucidating the enrichment pathways associated with hydrothermal exploitation of Cu, Pb, and Zn minerals in the Bregalnica River basin in the eastern part of the Republic of Macedonia. Dust samples were collected from 84 settlements. Atomic emission spectrometry and mass spectrometry with inductively coupled plasma were applied as analytical techniques for the determination of 69 element contents. Multivariate analysis was applied for the extraction of dominant geochemical markers...
November 29, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27900423/contamination-fractionation-and-biological-risk-related-to-metals-in-surface-sediments-from-the-largest-deep-freshwater-lake-in-china
#15
Hua-Bing Li, Yang-Guang Gu, Rong Wang, Hui-Bin Lu
The toxicity and mobility of metals in the environment are driven by their specific chemical forms and binding states. However, heavy metal fractionation in sediments from plateau deep lakes in China is rare. This study analyzed surface sediments collected from Fuxian Lake, the largest deep freshwater lake in China; parameters examined included total metal concentrations, chemical partitioning, and biological risk assessment. The average total concentrations (mg/kg) were 7.9 for Cd, 97.6 for Pb, 102.8 for Cr, 60...
November 29, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27900422/comparative-investigation-of-bacterial-fungal-and-archaeal-community-structures-in-soils-in-a-typical-oilfield-in-jianghan-china
#16
Zhi-Feng Zhou, Ming-Xia Wang, Xiao-Hu Zuo, Yan-Hong Yao
Agricultural soils in oilfields have high risk for polycyclic aromatic hydrocarbon (PAH) pollution. In this study, from the Jianghan Oilfield (Hubei Province, China) with a history of >50 years, 7 soil samples (OS-1 to OS-7) were collected. Subsequently, the bacterial, archaeal, and fungal community structures were investigated by Illumina MiSeq sequencing, and the relationship between microbial community structure and soil PAH content was analyzed. The results indicated that bacterial and archaeal Chao 1 indices showed a significantly negative relationship with soil PAH content, and only the bacterial Shannon index had a significantly negative relationship with soil PAH content...
November 29, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27889806/a-comparative-assessment-of-arsenic-risks-and-the-nutritional-benefits-of-fish-consumption-in-kuwait-arsenic-versus-omega-3-fatty-acids
#17
Adnan Husain, Kurunthachalam Kannan, Hing Man Chan, Brian Laird, Hanan Al-Amiri, Basma Dashti, Anwar Sultan, Amani Al-Othman, Bedraya Mandekar
Inorganic and organic forms of arsenic (As), as well as omega-3 fatty acids were measured in 578 fish/seafood samples that belong to 15 species of commonly consumed seafood in Kuwait. Arsenic speciation data, with the toxicological profile of inorganic arsenic (iAs) and fish consumption rates were applied in a probabilistic risk assessment to estimate the risk from exposure to iAs. The nutritional benefits of omega-3-fatty acid levels in various species of fish were taken into consideration. Results showed that the mean daily intake of iAs through fish consumption among the Kuwaiti population was 0...
November 26, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27882411/mercury-concentrations-in-feathers-of-adult-and-nestling-osprey-pandion-haliaetus-from-coastal-and-freshwater-environments-of-florida
#18
Darren G Rumbold, Karl E Miller, Timothy A Dellinger, Nicole Haas
We determined mercury (Hg) concentrations in feathers of osprey (Pandion haliaetus), both nestlings (n = 95) and adults (n = 110), across peninsular Florida and the Florida Keys during February-August 2014. Feathers plucked from nestlings, aged 3-7 weeks, contained Hg concentrations that ranged from 0.338 to 45.79 mg/kg and averaged 6.92 ± 7.58 mg/kg (mean ± 1SD). Feathers shed from adults contained significantly higher concentrations ranging from 0.375 to 93.65 mg/kg, with an average of 17.8 ± 16...
November 23, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27864585/changes-in-glutathione-s-transferase-activity-and-parental-care-patterns-in-a-catfish-pisces-ariidae-as-a-biomarker-of-anthropogenic-impact-in-a-brazilian-harbor
#19
Raimunda Nonata Fortes Carvalho Neta, Gleyciane Lobato Barbosa, Hetty Salvino Torres, Débora Batista Pinheiro Sousa, Jonatas da Silva Castro, Débora Martins Silva Santos, Lígia Tchaicka, Zafira da Silva de Almeida, Erivania Gomes Teixeira, Audalio Rebelo Torres
Catfish have been used as a model system for studying biochemical mechanisms of biotransformation. The main goal of this study was to identify alterations in hepatic glutathione S-transferase (GST) activity and changes in the parental care pattern of a mouth-brooding catfish, Sciades herzbergii, as a biomarker of anthropogenic impact in a port area on the northeastern coast of Brazil. The fish were sampled from a natural reserve (A1 = reference site) and from an industrialized port area (A2 = impacted site)...
November 18, 2016: Archives of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27858106/bioavailability-and-toxicity-of-copper-manganese-and-nickel-in-paronychiurus-kimi-collembola-and-biomarker-discovery-for-their-exposure
#20
Jino Son, Yun-Sik Lee, Sung-Eun Lee, Key-Il Shin, Kijong Cho
Bioavailability and toxicity of Cu, Mn, and Ni in Paronychiurus kimi were investigated after 28 days of exposure to OECD artificial soil spiked with these metals. Uptake and effect of Cu, Mn, and Ni on the reproduction of P. kimi were related to different metal fractions (water-soluble, 0.01 M CaCl2-extractable or porewater metal concentrations). Cu and Mn concentrations in P. kimi increased with increasing Cu and Mn concentrations in the soil, while Ni contents in P. kimi reached a plateau at a concentration higher than 200 mg/kg in soil...
November 17, 2016: Archives of Environmental Contamination and Toxicology
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