Keith R Solomon

Summary

Affiliation: University of Guelph
Country: Canada

Publications

  1. ncbi Ecological risk assessment for aquatic organisms from over-water uses of glyphosate
    Keith R Solomon
    Centre for Toxicology, University of Guelph, Guelph, Ontario, Canada
    J Toxicol Environ Health B Crit Rev 6:289-324. 2003
  2. doi Use of (eco)toxicity data as screening criteria for the identification and classification of PBT/POP compounds
    Keith R Solomon
    University of Guelph, Centre for Toxicology, Guelph, Ontario N1G2W1, Canada
    Integr Environ Assess Manag 5:680-96. 2009
  3. ncbi Effects of atrazine on fish, amphibians, and aquatic reptiles: a critical review
    Keith R Solomon
    Department of Environmental Biology and Centre for Toxicology, University of Guelph, Guelph, Ontario, Canada
    Crit Rev Toxicol 38:721-72. 2008
  4. ncbi Nonagricultural and residential exposures to pesticides
    Keith R Solomon
    Centre for Toxicology, University of Guelph, Bovey Building, Gordon St, Guelph ON N1G 2W1, Canada
    Scand J Work Environ Health 31:74-81; discussion 63-5. 2005
  5. ncbi Effects of a mixture of tetracyclines to Lemna gibba and Myriophyllum sibiricum evaluated in aquatic microcosms
    Richard A Brain
    Centre for Toxicology, Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Environ Pollut 138:425-42. 2005
  6. ncbi Circumpolar study of perfluoroalkyl contaminants in polar bears (Ursus maritimus)
    Marla Smithwick
    Department of Environmental Biology, University of Guelph, Bovey Building, Guelph, Ontario N1G 2W1, Canada
    Environ Sci Technol 39:5517-23. 2005
  7. doi Mercury concentrations in landlocked Arctic char (Salvelinus alpinus) from the Canadian Arctic. Part II: influence of lake biotic and abiotic characteristics on geographic trends in 27 populations
    Nikolaus Gantner
    Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada
    Environ Toxicol Chem 29:633-43. 2010
  8. ncbi Toxicity and hazard of selective serotonin reuptake inhibitor antidepressants fluoxetine, fluvoxamine, and sertraline to algae
    David J Johnson
    Centre for Toxicology, Bovey Administrative Building, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Ecotoxicol Environ Saf 67:128-39. 2007
  9. ncbi Microcosm evaluation of the fate, toxicity, and risk to aquatic macrophytes from perfluorooctanoic acid (PFOA)
    Mark L Hanson
    Centre for Toxicology, Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
    Arch Environ Contam Toxicol 49:307-16. 2005
  10. ncbi Biomagnification of perfluoroalkyl compounds in the bottlenose dolphin (Tursiops truncatus) food web
    Magali Houde
    Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
    Environ Sci Technol 40:4138-44. 2006

Detail Information

Publications94

  1. ncbi Ecological risk assessment for aquatic organisms from over-water uses of glyphosate
    Keith R Solomon
    Centre for Toxicology, University of Guelph, Guelph, Ontario, Canada
    J Toxicol Environ Health B Crit Rev 6:289-324. 2003
    ..Concentrations measured after ground application presented a greater risk, but the data were sparse and the assessment is more uncertain...
  2. doi Use of (eco)toxicity data as screening criteria for the identification and classification of PBT/POP compounds
    Keith R Solomon
    University of Guelph, Centre for Toxicology, Guelph, Ontario N1G2W1, Canada
    Integr Environ Assess Manag 5:680-96. 2009
    ..This paper offers guidance that can be used to identify candidate POPs that have the potential to cause significant adverse effects in the ecosystem...
  3. ncbi Effects of atrazine on fish, amphibians, and aquatic reptiles: a critical review
    Keith R Solomon
    Department of Environmental Biology and Centre for Toxicology, University of Guelph, Guelph, Ontario, Canada
    Crit Rev Toxicol 38:721-72. 2008
    ..For other responses, such as immune function, stress endocrinology, parasitism, or population-level effects, there are no indications of effects or there is such a paucity of good data that definitive conclusions cannot be made...
  4. ncbi Nonagricultural and residential exposures to pesticides
    Keith R Solomon
    Centre for Toxicology, University of Guelph, Bovey Building, Gordon St, Guelph ON N1G 2W1, Canada
    Scand J Work Environ Health 31:74-81; discussion 63-5. 2005
    ..17 and 0.21, respectively). However, inclusion of the type of spray nozzle used and the use of gloves while spraying in the model explained increased predictability and explained 68% of the variation...
  5. ncbi Effects of a mixture of tetracyclines to Lemna gibba and Myriophyllum sibiricum evaluated in aquatic microcosms
    Richard A Brain
    Centre for Toxicology, Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Environ Pollut 138:425-42. 2005
    ..gibba) and submerged (M. sibiricum) species of macrophytes. A hazard quotient assessment of the lowest EC10 value indicated significant risk, exceeding the critical HQ value, but not the lowest EC25 value...
  6. ncbi Circumpolar study of perfluoroalkyl contaminants in polar bears (Ursus maritimus)
    Marla Smithwick
    Department of Environmental Biology, University of Guelph, Bovey Building, Guelph, Ontario N1G 2W1, Canada
    Environ Sci Technol 39:5517-23. 2005
    ....
  7. doi Mercury concentrations in landlocked Arctic char (Salvelinus alpinus) from the Canadian Arctic. Part II: influence of lake biotic and abiotic characteristics on geographic trends in 27 populations
    Nikolaus Gantner
    Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada
    Environ Toxicol Chem 29:633-43. 2010
    ....
  8. ncbi Toxicity and hazard of selective serotonin reuptake inhibitor antidepressants fluoxetine, fluvoxamine, and sertraline to algae
    David J Johnson
    Centre for Toxicology, Bovey Administrative Building, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Ecotoxicol Environ Saf 67:128-39. 2007
    ....
  9. ncbi Microcosm evaluation of the fate, toxicity, and risk to aquatic macrophytes from perfluorooctanoic acid (PFOA)
    Mark L Hanson
    Centre for Toxicology, Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
    Arch Environ Contam Toxicol 49:307-16. 2005
    ..were consistently > or = 23.9 mg/L PFOA. A risk assessment for these plant species estimated a negligible probability of toxicity being observed from PFOA exposure at current environmental concentrations...
  10. ncbi Biomagnification of perfluoroalkyl compounds in the bottlenose dolphin (Tursiops truncatus) food web
    Magali Houde
    Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
    Environ Sci Technol 40:4138-44. 2006
    ..The results indicate that using plasma and liver PFC concentrations as surrogate to whole body burden in a top marine predator overestimates the BMFs and TMFs...
  11. ncbi Aquatic microcosm assessment of the effects of tylosin on Lemna gibba and Myriophyllum spicatum
    Richard A Brain
    Centre for Toxicology, Department of Environmental Biology, University of Guelph, Guelph, ON, Canada N1G 2W1
    Environ Pollut 133:389-401. 2005
    ..spicatum or L. gibba. A hazard quotient assessment indicated that tylosin poses little risk to either species of macrophyte, with an HQ value calculated to be nearly three orders of magnitude below 1 (0.002)...
  12. ncbi Ranking and prioritization of environmental risks of pharmaceuticals in surface waters
    Hans Sanderson
    Centre for Toxicology, University of Guelph, Bovey Building, Guelph, Ont, Canada N1G 2W1
    Regul Toxicol Pharmacol 39:158-83. 2004
    ..Data available: http://www.uoguelph.ca/~hsander/...
  13. ncbi Evaluation of monochloroacetic acid (MCA) degradation and toxicity to Lemna gibba, Myriophyllum spicatum, and Myriophyllum sibiricum in aquatic microcosms
    Mark L Hanson
    Centre for Toxicology, Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Aquat Toxicol 61:251-73. 2002
    ..The EC(10) was a more conservative estimate of toxicity than the statistically derived no observed effect concentration. Current concentrations of MCA are not likely to pose a risk to these aquatic plants in surface waters...
  14. ncbi Perflouroalkyl contaminants in liver tissue from East Greenland polar bears (Ursus maritimus)
    Marla Smithwick
    Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 24:981-6. 2005
    ..No significant correlations were found between concentrations of PFCAs in liver tissue and previously reported polychlorinated biphenyl (PCB) congeners analyzed in fat samples from the same bears...
  15. ncbi Role of temperature and enzyme induction in the biotransformation of polychlorinated biphenyls and bioformation of hydroxylated polychlorinated biphenyls by rainbow trout (Oncorhynchus mykiss)
    Andrea H Buckman
    Department of Environmental Biology, University of Guelph, Guelph, ON, Canada N1G 2W1
    Environ Sci Technol 41:3856-63. 2007
    ..The results of this study provide the first in vivo evidence that rainbow trout are responsive to CYP2B-like induction by PCBs and that this enzyme system can influence PCB concentrations and OH-PCB formation in fish...
  16. ncbi Short-term exposures of fish to perfluorooctane sulfonate: acute effects on fatty acyl-coa oxidase activity, oxidative stress, and circulating sex steroids
    Ken D Oakes
    Department of Zoology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 24:1172-81. 2005
    ....
  17. ncbi Accumulation and depuration of polychlorinated biphenyls from field-collected sediment in three freshwater organisms
    Jordana L Van Geest
    School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
    Environ Sci Technol 45:7011-8. 2011
    ..The appropriateness of a 28-d exposure for measuring steady-state concentrations in tissue of the invertebrates was confirmed, but further study is required for fish...
  18. ncbi Polychlorinated biphenyls and hydroxylated polychlorinated biphenyls in plasma of bottlenose dolphins (Tursiops truncatus) from the Western Atlantic and the Gulf of Mexico
    Magali Houde
    Department of Environmental Biology, University of Guelph, Ontario, Canada
    Environ Sci Technol 40:5860-6. 2006
    ..Results from this study show that OH-PCB are important environmental contaminants in dolphins and suggest that PCBs, decades after their ban, may still constitute a threat to wildlife...
  19. doi Fathead minnow (Pimephales promelas) reproduction is impaired in aged oil sands process-affected waters
    Richard J Kavanagh
    Department of Integrative Biology, University of Guelph, Guelph, ON, Canada
    Aquat Toxicol 101:214-20. 2011
    ....
  20. ncbi Biotransformation of polychlorinated biphenyls (PCBs) and bioformation of hydroxylated PCBs in fish
    Andrea H Buckman
    Department of Environmental Biology, University of Guelph, Guelph, Ont, Canada N1G 2W1
    Aquat Toxicol 78:176-85. 2006
    ..The results of this study demonstrate that laboratory held rainbow trout can biotransform a number of PCB congeners and that bioformation is likely an important source of OH-PCBs in wild salmonids of the Great Lakes...
  21. ncbi Structural and functional responses of plankton to a mixture of four tetracyclines in aquatic microcosms
    Christian J Wilson
    Centre for Toxicology and Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1 Canada
    Environ Sci Technol 38:6430-9. 2004
    ..The effects observed occurred at considerably greater concentrations than are currently measured in the environment, indicating minimal risk to aquatic organisms...
  22. ncbi Haloacetic acids in the aquatic environment. Part I: macrophyte toxicity
    Mark L Hanson
    Centre for Toxicology and Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada, N1G 2W1
    Environ Pollut 130:371-83. 2004
    ..The assessment found HAAs to be of low risk to aquatic macrophytes and the results are described in the second manuscript of this series...
  23. doi Reproductive and health assessment of fathead minnows (Pimephales promelas) inhabiting a pond containing oil sands process-affected water
    Richard J Kavanagh
    Department of Integrative Biology, University of Guelph, Guelph, ON, Canada
    Aquat Toxicol 130:201-9. 2013
    ....
  24. doi Fathead minnow (Pimephales promelas) reproduction is impaired when exposed to a naphthenic acid extract
    Richard J Kavanagh
    Department of Integrative Biology, University of Guelph, Guelph, ON, N1G 2W1, Canada
    Aquat Toxicol 116:34-42. 2012
    ..Collectively, these studies show that the NAs in OSPW have the potential to negatively affect reproduction in fathead minnows and that HCO₃⁻ reduces the acute and chronic toxicity of NAs...
  25. ncbi Biological monitoring of polyfluoroalkyl substances: A review
    Magali Houde
    Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
    Environ Sci Technol 40:3463-73. 2006
    ..Continuous monitoring with key sentinel species and standardization of analytical methods are recommended...
  26. ncbi Microcosm evaluation of the effects of an eight pharmaceutical mixture to the aquatic macrophytes Lemna gibba and Myriophyllum sibiricum
    Richard A Brain
    Department of Environmental Biology, Centre for Toxicology, University of Guelph, Guelph, Ont, N1G 2W1, Canada
    Aquat Toxicol 70:23-40. 2004
    ..sibiricum exposed to similar mixtures of pharmaceutical compounds. For M. sibiricum and L. gibba, respective minimum differences of 5 and 1%, were detectable, however, these effect sizes are not considered ecologically significant...
  27. ncbi An exposure assessment for selected pharmaceuticals within a watershed in Southern Ontario
    Linda Lissemore
    Department of Environmental Biology, Bovey Building, Gordon Street, University of Guelph, Guelph, Ont, Canada N1G 2W1
    Chemosphere 64:717-29. 2006
    ....
  28. ncbi Perfluoroalkyl compounds in relation to life-history and reproductive parameters in bottlenose dolphins (Tursiops truncatus) from Sarasota Bay, Florida, U.S.A
    Magali Houde
    Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 25:2405-12. 2006
    ..These chemicals also were detected in urine (mean sigma PFCs, 26.6 +/- 79 ng/g wet wt), indicating that the urinary system is an important pathway of PFC depuration in dolphins...
  29. ncbi Haloacetic acids in the aquatic environment. Part II: ecological risk assessment
    Mark L Hanson
    Centre for Toxicology and Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Environ Pollut 130:385-401. 2004
    ..TCA in some environments poses a slight risk to phytoplankton and future concentrations of TFA and CDFA are likely to increase due to their recalcitrant nature, warranting continued environmental surveillance of HAAs...
  30. ncbi Herbicidal effects of statin pharmaceuticals in Lemna gibba
    Richard A Brain
    Department of Environmental Biology, University of Guelph, Ontario, Canada
    Environ Sci Technol 40:5116-23. 2006
    ....
  31. ncbi Hydroxylated and methylsulfone-containing metabolites of polychlorinated biphenyls in the plasma and blubber of bowhead whales (Balaena mysticetus)
    Paul F Hoekstra
    University of Guelph, Department of Environmental Biology, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 22:2650-8. 2003
    ..Further research is required to elucidate the toxicokinetics and distribution of OH-PCBs in this cetacean...
  32. doi Atrazine does not affect algal biomass or snail populations in microcosm communities at environmentally relevant concentrations
    Leilan R Baxter
    University of Guelph, Guelph, Ontario, Canada
    Environ Toxicol Chem 30:1689-96. 2011
    ....
  33. ncbi Probabilistic ecological hazard assessment: evaluating pharmaceutical effects on aquatic higher plants as an example
    Richard A Brain
    Centre for Toxicology and Department of Environmental Biology, University of Guelph, Guelph, Ont, Canada N1G 2W1
    Ecotoxicol Environ Saf 64:128-35. 2006
    ..gibba (8PM data). Hazard quotients calculated from the 1% and 5% distribution thresholds indicated potential risk only in certain cases...
  34. ncbi Effects of perfluorooctane sulfonate and perfluorooctanoic acid on the zooplanktonic community
    Hans Sanderson
    Centre for Toxicology, University of Guelph, Bovey Building, Gordon Street, Guelph, Toronto, Ont, Canada N1G 2W1
    Ecotoxicol Environ Saf 58:68-76. 2004
    ..magna and D. pulicaria were not the most sensitive species and that laboratory tests are not always conservative relative to microcosm experiments. Food scarcity due to phytotoxicity was not the reason for the difference...
  35. ncbi Toxicity and hazard of a mixture of SSRIs to zooplankton communities evaluated in aquatic microcosms
    Brian D Laird
    Centre for Toxicology, Canadian Network of Toxicology Centres CNTC, University of Guelph, Guelph, ON, Canada N1G 2W1
    Chemosphere 69:949-54. 2007
    ..51 nM) yielded HQs at least two orders of magnitude below 1. Therefore, mixtures of SSRIs do not appear to present a hazard to zooplankton communities at environmentally relevant concentrations...
  36. doi Bioaccumulation of the synthetic hormone 17alpha-ethinylestradiol in the benthic invertebrates Chironomus tentans and Hyalella azteca
    Eve B Dussault
    Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Ecotoxicol Environ Saf 72:1635-41. 2009
    ..The results of the present study suggest that consumption of invertebrate food items could provide an additional source of exposure to estrogenic substances in vertebrate predators...
  37. ncbi Bioconcentration and tissue distribution of perfluorinated acids in rainbow trout (Oncorhynchus mykiss)
    Jonathan W Martin
    University of Guelph, Department of Environmental Biology, Bovey Building, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 22:196-204. 2003
    ....
  38. ncbi PCBs can diminish the influence of temperature on thyroid indices in rainbow trout (Oncorhynchus mykiss)
    Andrea H Buckman
    Department of Environmental Biology, University of Guelph, Guelph, Ont, Canada
    Aquat Toxicol 84:366-78. 2007
    ....
  39. ncbi Toxicity of perfluorooctane sulfonic acid and perfluorooctanoic acid to Chironomus tentans
    Michelle M MacDonald
    Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 23:2116-23. 2004
    ....
  40. ncbi Airborne haloacetic acids
    Jonathan W Martin
    Department of Environmental Biology, University of Guelph, Bovey Building, Guelph, Ontario, Canada N1G 2W1
    Environ Sci Technol 37:2889-97. 2003
    ..A simple deposition model indicated that dry deposition of TFA and TCA should not be neglected in temperate mid-latitude environments and that precipitation concentrations can be successfully predicted by the Henry's law constant...
  41. doi Validation of Ontario's new laboratory-based bioaccumulation methods with in situ field data
    Jordana L Van Geest
    University of Guelph, Guelph, Ontario, Canada
    Environ Toxicol Chem 30:950-8. 2011
    ....
  42. doi Detecting oil sands process-affected waters in the Alberta oil sands region using synchronous fluorescence spectroscopy
    Richard J Kavanagh
    Department of Integrative Biology, University of Guelph, Guelph, ON, Canada
    Chemosphere 76:120-6. 2009
    ..SFS is proposed to be a simple and fast method to monitor the release of OSPW into ground and surface waters in the oil sands region...
  43. doi Mercury concentrations in landlocked Arctic char (Salvelinus alpinus) from the Canadian Arctic. Part I: insights from trophic relationships in 18 lakes
    Nikolaus Gantner
    Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada
    Environ Toxicol Chem 29:621-32. 2010
    ..5 +/- 1.1 to 64.3 +/- 0.8. Results indicate that TMFs and food chain length (FCL) are key factors in explaining interlake variability in biomagnification of [Hg] among different lakes...
  44. ncbi Dissipation of oxytetracycline, chlortetracycline, tetracycline and doxycycline using HPLC-UV and LC/MS/MS under aquatic semi-field microcosm conditions
    Hans Sanderson
    University of Guelph, Centre for Toxicology, Bovey Building, Guelph, Ont, N1G 2W1, Canada
    Chemosphere 60:619-29. 2005
    ..DT50 for products were less than 1.2 days. Formation of 4-epi-anh-tetracyclines, occurred at neutral to weak alkaline conditions...
  45. ncbi Exposure assessment and microcosm fate of selected selective serotonin reuptake inhibitors
    David J Johnson
    Centre for Toxicology, Department of Environmental Biology, University of Guelph, Ont, Canada
    Regul Toxicol Pharmacol 42:313-23. 2005
    ..Partitioning into other environmental compartments such as this may act as a reservoir from which SSRIs may be re-released into surface waters and indicates the potential susceptibility of benthos...
  46. ncbi Enantiomer-specific biomagnification of alpha-hexachlorocyclohexane and selected chiral chlordane-related compounds within an Arctic marine food web
    Paul F Hoekstra
    University of Guelph, Department of Environmental Biology, Environment Canada, National Water Research Institute, Burlington, Ontario, Canada
    Environ Toxicol Chem 22:2482-91. 2003
    ..However, the modification of EFs from bowhead liver to blubber suggests that this species has the ability to enantioselectively biotransform and accumulate several chiral OC compounds...
  47. ncbi Toxicity classification and evaluation of four pharmaceuticals classes: antibiotics, antineoplastics, cardiovascular, and sex hormones
    Hans Sanderson
    University of Guelph, Centre for Toxicology, Bovey Building, Ontario, Canada N1G 2W1
    Toxicology 203:27-40. 2004
    ..Data for the individual compounds are accessible via...
  48. ncbi Impact of perfluorooctanoic acid on fathead minnow (Pimephales promelas) fatty acyl-CoA oxidase activity, circulating steroids, and reproduction in outdoor microcosms
    Ken D Oakes
    Department of Zoology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 23:1912-9. 2004
    ..Perfluorooctanoic acid appears to be relatively nontoxic at environmentally relevant concentrations but may impact biochemical and reproductive endpoints under conditions associated with environmental spills...
  49. doi Toxicity of human pharmaceuticals and personal care products to benthic invertebrates
    Eve B Dussault
    Department of Environmental Biology, University of Guelph, Guelph, ON, Canada
    Environ Toxicol Chem 27:425-32. 2008
    ..In contrast, our data also indicate that considering the low concentrations currently detected in the environment, ATO and EE(2) pose negligible risks to benthic invertebrates...
  50. doi Chronic toxicity of the synthetic hormone 17alpha-ethinylestradiol to Chironomus tentans and Hyalella azteca
    Eve B Dussault
    Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 27:2521-9. 2008
    ..azteca and C. tentans, indicating that adverse effects are not expected, and that environmental exposure to EE2 likely poses a low risk to benthic invertebrates...
  51. ncbi Response of the zooplankton community and environmental fate of perfluorooctane sulfonic acid in aquatic microcosms
    Timothy M Boudreau
    Centre for Toxicology, Department of Environmental Biology, Bovey Building, University of Guelph, Guelph, Ontario, Canada N1G 2W1
    Environ Toxicol Chem 22:2739-45. 2003
    ..Presently, there appears to be little hazard to these freshwater organisms at reported environmental concentrations...
  52. ncbi Organohalogen contaminants in delphinoid cetaceans
    Magali Houde
    University of Guelph, Department of Environmental Biology, Guelph, Ontario NIG 2WI, Canada
    Rev Environ Contam Toxicol 184:1-57. 2005
    ..Nonetheless, PHCs are also found in marine mammal tissues from the Southern Hemisphere and in remote regions such as the Arctic, reflecting the global distribution and contamination of PHCs in the marine ecosystem...
  53. ncbi Field level evaluation and risk assessment of the toxicity of dichloroacetic acid to the aquatic macrophytes Lemna gibba, Myriophyllum spicatum, and Myriophyllum sibiricum
    Mark L Hanson
    Department of Environmental Biology, Centre for Toxicology, University of Guelph, Ont, N1G 2W1, Guelph, Canada
    Ecotoxicol Environ Saf 55:46-63. 2003
    ..01%. The use of effect measure distributions holds promise as a new risk assessment technique for aquatic plants. Currently, environmental levels of DCA do not pose a risk to these plants...
  54. ncbi Trichloroacetic acid (TCA) and trifluoroacetic acid (TFA) mixture toxicity to the macrophytes Myriophyllum spicatum and Myriophyllum sibiricum in aquatic microcosms
    Mark L Hanson
    Centre for Toxicology, Department of Environmental Biology, University of Guelph, ON, Canada
    Sci Total Environ 285:247-59. 2002
    ..These data suggest that TCA/TFA mixtures at environmentally relevant concentrations do not pose a significant risk to these aquatic macrophytes...
  55. doi Interactions between atrazine and phosphorus in aquatic systems: effects on phytoplankton and periphyton
    Leilan R Baxter
    School of Environmental Sciences, University of Guelph, Guelph, ON, Canada N1G 2W1
    Chemosphere 90:1069-76. 2013
    ....
  56. doi Toxicity assessment of collected fractions from an extracted naphthenic acid mixture
    Richard A Frank
    Centre for Toxicology, University of Guelph, Guelph, ON, Canada
    Chemosphere 72:1309-14. 2008
    ..9+/-7.4 mg l(-1)). Although these results support field observations of microbial degradation of low molecular weight NAs decreasing OSPW toxicity, it is not clear why larger NAs, given their greater hydrophobicity, would be less toxic...
  57. ncbi Toxicokinetics of three polychlorinated biphenyl technical mixtures in rainbow trout (Oncorhynchus mykiss)
    Andrea H Buckman
    Department of Environmental Biology, University of Guelph, Guelph, Ontario, N1G 2W1 Canada
    Environ Toxicol Chem 23:1725-36. 2004
    ..Because t1/2s in this experiment were slower than t1/2s reported in other work, water temperature also may be an important factor in determining the t1/2s of all PCB congeners in fish...
  58. ncbi Assessing sensitivity and recovery of field-collected periphyton acutely exposed to atrazine using PSII inhibition under laboratory conditions
    Ryan S Prosser
    School of Environmental Sciences, University of Guelph, Guelph, ON, Canada
    Ecotoxicology 22:1367-83. 2013
    ....
  59. doi Environmental fate of three novel brominated flame retardants in aquatic mesocosms
    Benjamin P de Jourdan
    School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
    Environ Toxicol Chem 32:1060-8. 2013
    ..The ratio of EHTeBB to BEHTBP differed in the mesocosm compartments compared with the technical product used for treatment, indicating increased degradation of EHTeBB relative to BETHBP...
  60. doi Toxicity of fluorotelomer carboxylic acids to the algae Pseudokirchneriella subcapitata and Chlorella vulgaris, and the amphipod Hyalella azteca
    Rebecca J Mitchell
    School of Environmental Sciences, University of Guelph, Guelph, ON N1G2W1, Canada
    Ecotoxicol Environ Saf 74:2260-7. 2011
    ..However, the toxicity values are approximately 1000-fold above those detected in the environment indicating negligible risk to aquatic invertebrates...
  61. ncbi Fluorotelomer acids are more toxic than perfluorinated acids
    Michelle M MacDonald Phillips
    Department of Environmental Biology, University of Guelph, Edmund C Bovey Building, Guelph, Ontario, Canada
    Environ Sci Technol 41:7159-63. 2007
    ..Our data provide the first evidence that PFCA precursors are more toxic than the PFCAs themselves...
  62. ncbi Effects of monensin on zooplankton communities in aquatic microcosms
    Derek G Hillis
    Department of Environmental Biology, Ontario Agricultural College, University of Guelph, Guelph, Ontario, N1G 2W1, Canada
    Environ Sci Technol 41:6620-6. 2007
    ..Monensin concentrations measured in surface waters were 40 times lower than the determined no-observable effect concentration (NOEC) of 50 microg/L and do not likely present a risk to zooplankton...
  63. ncbi Effects of 25 pharmaceutical compounds to Lemna gibba using a seven-day static-renewal test
    Richard A Brain
    Centre for Toxicology, Department of Environmental Biology, Bovey Administrative Building, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 23:371-82. 2004
    ..Wet mass was consistently the most sensitive endpoint above 100 microg/L; conversely, frond number was the most sensitive below 100 microg/L. Pigment endpoints were significantly less sensitive than growth endpoints...
  64. doi Temporal trends of mercury, cesium, potassium, selenium, and thallium in Arctic char (Salvelinus alpinus) from Lake Hazen, Nunavut, Canada: effects of trophic position, size, and age
    Nikolaus Gantner
    Department of Environmental Biology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 28:254-63. 2009
    ..The results confirm the need to consider trophic position and fish size when monitoring temporal trends of Hg, particularly for species with different morphotypes...
  65. ncbi Coca and poppy eradication in Colombia: environmental and human health assessment of aerially applied glyphosate
    Keith R Solomon
    Centre for Toxicology and Department of Environmental Biology, University of Guelph, Guelph, ON, N1G 2W1, Canada
    Rev Environ Contam Toxicol 190:43-125. 2007
    ....
  66. doi Chronic toxicity of fluorotelomer acids to Daphnia magna and Chironomus dilutus
    Michelle M Phillips
    School of Environmental Sciences, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 29:1123-31. 2010
    ....
  67. doi A comparison of the bioaccumulation potential of three freshwater organisms exposed to sediment-associated contaminants under laboratory conditions
    Jordana L Van Geest
    School of Environmental Sciences, University of Guelph, Guelph, Ontario, Canada
    Environ Toxicol Chem 30:939-49. 2011
    ....
  68. ncbi Creosote toxicity to photosynthesis and plant growth in aquatic microcosms
    Christopher A Marwood
    Centre for Toxicology, University of Guelph, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 22:1075-85. 2003
    ....
  69. doi Measuring bioaccumulation of contaminants from field-collected sediment in freshwater organisms: a critical review of laboratory methods
    Jordana L Van Geest
    School of Environmental Sciences, University of Guelph, Guelph, ON, Canada
    Environ Toxicol Chem 29:2391-401. 2010
    ..In addition to proper evaluation of the various exposure techniques and conditions, a need exists for more consistent inclusion of quality control procedures during testing...
  70. doi Similarities between the discovery and regulation of pharmaceuticals and pesticides: in support of a better understanding of the risks and benefits of each
    Clarence J Swanton
    Department of Plant Agriculture, University of Guelph, Guelph, Ontario, Canada
    Pest Manag Sci 67:790-7. 2011
    ..It is concluded that plant and animal health are vital to maintaining human health, and that pesticides used in food production are, as with pharmaceuticals, a vital tool used to maintain human health...
  71. ncbi Trichloroacetic acid fate and toxicity to the macrophytes Myriophyllum spicatum and Myriophyllum sibiricum under field conditions
    Mark L Hanson
    Department of Environmental Biology, Centre for Toxicology, University of Guelph, ON, Canada
    Aquat Toxicol 56:241-55. 2002
    ..These data suggest that TCA does not pose a significant risk to these macrophytes up to 10 mg/l, which typically exceeds environmentally relevant concentrations by several orders of magnitude...
  72. ncbi Diethylaminoethyl-cellulose clean-up of a large volume naphthenic acid extract
    Richard A Frank
    Centre for Toxicology, University of Guelph, Guelph, ON, Canada N1G 2W1
    Chemosphere 64:1346-52. 2006
    ..The DEAE-cellulose treatment had only a minor effect on the NA concentration, no noticeable effect on the NA fingerprint, and no significant effect on the mixture toxicity towards Vibrio fischeri...
  73. ncbi New concepts in ecological risk assessment: where do we go from here?
    Keith R Solomon
    Department of Environmental Biology, Centre for Toxicology, University of Guelph, ON, Canada
    Mar Pollut Bull 44:279-85. 2002
    ..These techniques have not been widely applied for risk assessment of dredged materials, however, with appropriate consideration of bioavailability and spatial and nature of the data these techniques can be applied to soils and sediments...
  74. ncbi New technique for estimating thresholds of toxicity in ecological risk assessment
    Mark L Hanson
    Centre for Toxicology, Department of Environmental Biology, University of Guelph, Ontario, Canada
    Environ Sci Technol 36:3257-64. 2002
    ..Using this new risk assessment method, we conclude that MCA does not appear to pose a risk to aquatic macrophytes under field conditions at current environmental concentrations...
  75. doi Structural responses of Daucus carota root-organ cultures and the arbuscular mycorrhizal fungus, Glomus intraradices, to 12 pharmaceuticals
    Derek G Hillis
    Department of Environmental Biology, Ontario Agricultural College, University of Guelph, Guelph, ON, Canada N1G 2W1
    Chemosphere 73:344-52. 2008
    ..Root-organ cultures provide an effective means to evaluate chemical stressors on arbuscular mycorrhizal fungi and can be used to screen for root-based phytotoxicity...
  76. ncbi Probabilistic hazard assessment of environmentally occurring pharmaceuticals toxicity to fish, daphnids and algae by ECOSAR screening
    Hans Sanderson
    Center for Toxicology, University of Guelph, Bovey Building, Gordon Street, Guelph, Ont, Canada N1G 2W1
    Toxicol Lett 144:383-95. 2003
    ..are still uncertain. (Q)SAR's can be important prioritization tools for subsequent experimental risk assessment of pharmaceuticals in surface waters, due to the prevalent lack of ecotoxicological data...
  77. ncbi Spatial distribution of polybrominated diphenyl ethers and polybrominated biphenyls in lake trout from the Laurentian Great Lakes
    Jennifer M Luross
    Department of Environmental Biology, University of Guelph, Ont, Canada
    Chemosphere 46:665-72. 2002
    ..25+/-0.13 ng/g ww, 1.7+/-0.89 ng/g lw). In all lake trout samples, 2,2',4,4',5,5'-hexabromobiphenyl (BB-153), a major constituent of the flame-retardant FireMaster BP-6, was the predominant PBB congener...
  78. ncbi Dietary accumulation of perfluorinated acids in juvenile rainbow trout (Oncorhynchus mykiss)
    Jonathan W Martin
    University of Guelph, Department of Environmental Biology, Bovey Building, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 22:189-95. 2003
    ..Dietary exposure will not result in biomagnification of PFAs in juvenile trout, but extrapolation of these bioaccumulation parameters to larger fish and homeothermic organisms should not be performed...
  79. ncbi Changes in tropospheric composition and air quality due to stratospheric ozone depletion
    Keith R Solomon
    Centre for Toxicology, University of Guelph, Guelph, ON, N1G 2W1, Canada
    Photochem Photobiol Sci 2:62-7. 2003
    ..Also, changes in the aerosol content of the atmosphere resulting from global climate change may affect ozone photolysis rate coefficients and hence reduce or increase tropospheric ozone concentrations...
  80. ncbi Identification of compounds associated with testosterone depressions in fish exposed to bleached kraft pulp and paper mill chemical recovery condensates
    Andrew M Belknap
    Department of Environmental Biology, University of Guelph, Bovey Building, Gordon Street, Guelph, Ontario N1G 2W1, Canada
    Environ Toxicol Chem 25:2322-33. 2006
    ..Mass spectral interpretation indicated hydroxylated diterpenoids, sesquiterpenoids, and a lignin-derived stilbene as classes of chemicals associated with steroid depressions...
  81. ncbi Enantiomer-specific accumulation of PCB atropisomers in the bowhead whale (Balaena mysticetus)
    Paul F Hoekstra
    Department of Environmental Biology, University of Guelph, Ontario, Canada
    Environ Sci Technol 36:1419-25. 2002
    ..Results suggest that enantioselective accumulation of PCB-91, 95, and 149 is influenced by PCB concentrations, age, and/or the modification of an uncharacterized stereoselective process (or processes) during sexual maturity...
  82. ncbi Aquatic persistence of eight pharmaceuticals in a microcosm study
    Monica W Lam
    Department of Chemistry, University of Toronto, 80 St George Street, Toronto, Ontario M5S 3H6, Canada
    Environ Toxicol Chem 23:1431-40. 2004
    ..Observed photoproducts of several of the pharmaceuticals remained photoreactive, which led to further degradation in irradiated surface waters...
  83. ncbi Plasma sex steroid concentrations and gonadal aromatase activities in African clawed frogs (Xenopus laevis) from South Africa
    Markus Hecker
    Department of Zoology, National Food Safety and Toxicology Center, Michigan State University, East Lansing, Michigan 48824, USA
    Environ Toxicol Chem 23:1996-2007. 2004
    ..Although exposure to agricultural inputs did not affect aromatase activities, effects of atrazine or coapplied pesticides on sex steroid homeostasis cannot be excluded at this point...
  84. ncbi Terminology of gonadal anomalies in fish and amphibians resulting from chemical exposures
    Markus Hecker
    Department of Zoology, National Food Safety and Toxicology Center, Institute for Environmental Toxicology, Michigan State University, East Lansing, MI 48824 1222, USA
    Rev Environ Contam Toxicol 187:103-31. 2006
    ....
  85. ncbi The use of terrestrial and aquatic microcosms and mesocosms for the ecological risk assessment of veterinary medicinal products
    Paul J Van den Brink
    Alterra, Wageningen University and Research Centre, 6700 AA Wageningen, The Netherlands
    Environ Toxicol Chem 24:820-9. 2005
    ..We suggest that some of the approaches developed for pesticide risk assessment can be used for VMPs and offer suggestions for the development of a framework for ecological risk assessment of VMPs...
  86. ncbi A protocol for conducting 7-day daily renewal tests with Lemna gibba
    Richard A Brain
    Department of Environmental Studies, Center for Reservoir and Aquatic Systems Research, Baylor University, One Bear Place 97388, Waco, Texas 76798 7388, USA
    Nat Protoc 2:979-87. 2007
    ..gibba. This protocol is based on a modified version of a widely accepted static method...
  87. ncbi Variation, replication, and power analysis of Myriophyllum spp. microcosm toxicity data
    Mark L Hanson
    UMR INRA ENSAR Ecobiologie et Qualité des Hydronsystèmes, Continentaux, 65 rue de Saint Brieuc CS 84215, 35042 Rennes, France
    Environ Toxicol Chem 22:1318-29. 2003
    ..Based on statistical sensitivity, ecological relevance, and toxicological sensitivity, we recommend using plant length and root endpoints as indicators of toxicity under field conditions...
  88. ncbi Ecological impact and environmental fate of perfluorooctane sulfonate on the zooplankton community in indoor microcosms
    Hans Sanderson
    Department of Environment, Technology and Social Studies, University of Roskilde, Denmark
    Environ Toxicol Chem 21:1490-6. 2002
    ..The rank order of susceptibility for the test community was Copepoda > Cladocera > Rotifera, assuming all adverse direct effects...
  89. ncbi Effects of pharmaceutical mixtures in aquatic microcosms
    Sean M Richards
    Department of Biological and Environmental Sciences, University of Tennessee at Chattanooga, Chattanooga, Tennessee 37403, USA
    Environ Toxicol Chem 23:1035-42. 2004
    ..Although the present data do not suggest that ibuprofen, fluoxetine, and ciprofloxacin are individually causing adverse effects in surface-water environments, questions remain about additive responses from mixtures...
  90. ncbi Reproduction, larval growth, and reproductive development in African clawed frogs (Xenopus laevis) exposed to atrazine
    Louis H du Preez
    School of Environmental Sciences and Development, North West University, Private Bag X6001, Potchefstroom 2520, South Africa
    Chemosphere 71:546-52. 2008
    ..Our data do not support the hypothesis that atrazine significantly affects reproductive fitness and development of frogs...
  91. ncbi The impact of insecticides and herbicides on the biodiversity and productivity of aquatic communities
    Dean G Thompson
    Ecol Appl 16:2022-7; author reply 2027-34. 2006
  92. ncbi Impact of perfluorooctanoic acid on the structure of the zooplankton community in indoor microcosms
    Hans Sanderson
    Department of Environment, Technology and Social Studies, University of Roskilde, PO Box 260, DK 4000 Roskilde, Denmark
    Aquat Toxicol 62:227-34. 2003
    ..05). Additional chronic toxicity testing should also be addressed since these compounds are so persistent and recalcitrant...
  93. ncbi Aquatic ecotoxicology of fluoxetine
    Bryan W Brooks
    Institute of Applied Sciences, University of North Texas, Denton, TX, USA
    Toxicol Lett 142:169-83. 2003
    ....
  94. ncbi Aquatic plants exposed to pharmaceuticals: effects and risks
    Richard A Brain
    Center for Reservoir and Aquatic Systems Research, Department of Environmental Studies, Baylor University, One Bear Place, Waco, TX 76798 7388, USA
    Rev Environ Contam Toxicol 192:67-115. 2008
    ....