Ross J Norstrom
Affiliation: Environment Canada
- Brominated flame retardants in polar bears (Ursus maritimus) from Alaska, the Canadian Arctic, East Greenland, and SvalbardDerek C G Muir
National Water Research Institute, Environment Canada, Burlington, Ontario, Canada
Environ Sci Technol 40:449-55. 2006..Significantly lower sigmaPBDE concentrations were found in fat of bears from Canada and Alaska (means ranging from 7.6 to 22 ng/g lw)...
- Understanding bioaccumulation of POPs in food webs. Chemical, biological, ecological and environmental considerationsRoss J Norstrom
Environment Canada, Canadian Wildlife Service, 100 Gamelin Blvd, Hull, QC K1A 0H3, Canada
Environ Sci Pollut Res Int 9:300-3. 2002
- Geographical distribution (2000) and temporal trends (1981-2000) of brominated diphenyl ethers in Great Lakes hewing gull eggsRoss J Norstrom
Environment Canada, National Wildlife Research Centre, 100 Gamelin Boulevard, Hull, Quebec KIA 0H3, Canada
Environ Sci Technol 36:4783-9. 2002..If present rates of change continue, concentrations of sigmaBDEs will equal or surpass those of sigmaPCBs in Great Lakes herring gull eggs in 10-15 years...
- Mercury and other trace elements in a pelagic Arctic marine food web (Northwater Polynya, Baffin Bay)Linda M Campbell
National Water Research Institute, Environment Canada, 867 Lakeshore Road, Burlington, Ontario, Canada, L7R 4A6
Sci Total Environ 351:247-63. 2005....
- Composition of chlorinated hydrocarbon contaminants among major adipose tissue depots of polar bears (Ursus maritimus) from the Canadian high ArcticJonathan Verreault
National Wildlife Research Centre, Science and Technology Branch, Environment Canada, Carleton University, Ottawa, Ontario, Canada K1A 0H3
Sci Total Environ 370:580-7. 2006....
- Hydroxylated PCBs and other chlorinated phenolic compounds in lake trout (Salvelinus namaycush) blood plasma from the Great Lakes regionLinda M Campbell
National Water Research Institute, Environment Canada, Burlington, Ontario L7R 4A6, Canada
Environ Sci Technol 37:1720-5. 2003..3 and 27.7 pg/g), and 4'-OH-CB208 (24.5 and 34.7 pg/g) were found in lake trout from Lake Ontario and Lake Superior, respectively. Future studies to delineate the sources and impacts of CPCs in the Great Lakes catchment are needed...
- Comprehensive re-analysis of archived herring gull eggs reconstructs historical temporal trends in chlorinated hydrocarbon contamination in Lake Ontario and Green Bay, Lake Michigan, 1971-1982Ross J Norstrom
National Wildlife Research Centre, Canadian Wildlife Service, Environment Canada, Carleton University Raven Road, Ottawa, CanadaON K1A 0H3
J Environ Monit 8:835-47. 2006....
- ABAM, a model for bioaccumulation of POPs in birds: validation for adult herring gulls and their eggs in Lake OntarioRoss J Norstrom
National Wildlife Research Centre, Canadian Wildlife Service, Environment Canada, Carleton University, Raven Road, Ottawa, ON K1A 0H3, Canada
Environ Sci Technol 41:4339-47. 2007..With species-specific adjustments, ABAM can be regarded as a general model for lipophilic POPs bioaccumulation in birds...
- PCBs and organochlorine pesticides in blubber biopsies from free-ranging St. Lawrence River Estuary beluga whales (Delphinapterus leucas), 1994-1998Karen E Hobbs
National Water Research Institute, Environment Canada, ON, L7R 4A6, Burlington, Canada
Environ Pollut 122:291-302. 2003..It also appears that measuring contaminant concentrations only in stranded whales, may overestimate OC levels in the population as a whole, especially for highly chlorinated OCs...
- Why do organochlorine differences between arctic regions vary among trophic levels?Katrine Borgå
Norwegian Polar Institute, N 9296 Tromsø, Norway
Environ Sci Technol 39:4343-52. 2005..Differences in the spatial trends of OCs between trophic levels in the Arctic are important for consideration when assessing regional differences in spatial and temporal trends of discontinued and current-use contaminants...
- Does high organochlorine (OC) exposure impair the resistance to infection in polar bears (Ursus maritimus)? Part I: Effect of OCs on the humoral immunityElisabeth Lie
National Veterinary Institute, Oslo, Norway
J Toxicol Environ Health A 67:555-82. 2004..haemolytica. The present study demonstrated that high OC levels may impair the polar bears ability to produce antibodies and thus may produce impaired resistance to infections...
- Organochlorine contaminants in seven species of Arctic seabirds from northern Baffin BayAndrea H Buckman
Department of Environmental Biology, University of Guelph, Guelph, ON, Canada N1G 2W1
Environ Pollut 128:327-38. 2004..Trophic level, migration, scavenging and biotransformation all play important roles in the OCs found in Arctic seabirds...
- Examination of the bioaccumulation of halogenated dimethyl bipyrroles in an Arctic marine food web using stable nitrogen isotope analysisSheryl A Tittlemier
Centre for Analytical and Environmental Chemistry, Carleton University, Ottawa, Ontario, Canada
Environ Pollut 116:85-93. 2002..None of the four HDBP congeners in ringed seals followed the general trend of increasing concentration with trophic level, which was possibly due to an ability of the seals to metabolize HDBPs...
- Development and validation of a herring gull embryo toxicokinetic model for PCBsKen G Drouillard
Great Lakes Institute for Environmental Research, University of Windsor, Windsor, ON, Canada, N9B 3P4
Ecotoxicology 12:55-68. 2003..Consistent with experimental data for other avian species, the model predicts that the highest PCB concentrations in the embryo/chick occur during pipping or soon after when yolk lipids have been completely resorbed by the embryo...
- Enantiomeric fractions of chiral polychlorinated biphenyls provide insights on biotransformation capacity of arctic biotaNicholas A Warner
Department of Chemistry, University of Alberta, Edmonton, Alberta T6G 2G2, Canada
Environ Toxicol Chem 24:2763-7. 2005..This study demonstrates the utility of using chiral analysis of PCBs to investigate biotransformation within biota of arctic food webs...
- Temporal trends of perfluoroalkyl contaminants in polar bears (Ursus maritimus) from two locations in the North American Arctic, 1972-2002Marla Smithwick
Department of Environmental Biology, University of Guelph, Bovey Building, Guelph, Ontario N1G 2W1, Canada
Environ Sci Technol 40:1139-43. 2006..The doubling time for PFOS was similar to the doubling time of production of perfluoroctylsulfonyl-fluoride-based products during the 1990s...
- Regional and species specific bioaccumulation of major and trace elements in Arctic seabirdsKatrine Borgå
Norwegian Polar Institute, Polar Environmental Centre, N 9296 Tromsø, Norway
Environ Toxicol Chem 25:2927-36. 2006....
- Chlorinated hydrocarbon contaminants and metabolites in polar bears (Ursus maritimus) from Alaska, Canada, East Greenland, and Svalbard: 1996-2002Jonathan Verreault
University of Windsor, Great Lakes Institute for Environmental Research, Windsor, Canada, ON N9B 3P4
Sci Total Environ 351:369-90. 2005..In addition to continued biomonitoring, further research on health and population status is needed to evaluate the impact from chronic exposure of polar bear populations to CHCs and their metabolites...
- Does high organochlorine (OC) exposure impair the resistance to infection in polar bears (Ursus maritimus)? Part II: Possible effect of OCs on mitogen- and antigen-induced lymphocyte proliferationElisabeth Lie
National Veterinary Institute, Oslo, Norway
J Toxicol Environ Health A 68:457-84. 2005..2004)...
- Vapour pressures, aqueous solubilities, Henry's Law constants, and octanol/water partition coefficients of a series of mixed halogenated dimethyl bipyrrolesSheryl A Tittlemier
Centre for Analytical and Environmental Chemistry, Carleton University, Ottawa, Ont, Canada K1S 5B6
Chemosphere 57:1373-81. 2004..Only slight differences in behaviour amongst HDBP congeners were predicted since substitution of a bromine for a chlorine (Cl/Br substitution) atom had less effect than H/Cl or H/Br substitution on P(o)(L,25), S(w,25), H25, and K(ow)...
- Reproductive and morphological effects of halogenated dimethyl bipyrroles on captive American kestrels (Falco sparverius)Sheryl A Tittlemier
Centre for Analytical and Environmental Chemistry, Carleton University, Ottawa, Ontario K1S 5B6, Canada
Environ Toxicol Chem 22:1497-506. 2003..Only minor histomorphological changes were detected in the hepatic tissue. The lack of serious effects suggests that HDBPs are not an acute reproductive threat to avian populations...
- Pentachlorophenol and hydroxylated polychlorinated biphenyl metabolites in umbilical cord plasma of neonates from coastal populations in QuébecCourtney D Sandau
Centre for Analytical and Environmental Chemistry, Department of Chemistry, Carleton University, Ottawa, Ontario, Canada
Environ Health Perspect 110:411-7. 2002..Further studies are needed to examine the effects of chlorinated phenolic compounds on thyroid hormone status in newborns...
- Structure elucidation of four possible biogenic organohalogens using isotope exchange mass spectrometrySheryl A Tittlemier
Centre for Analytical and Environmental Chemistry, Carleton University, 1125 Colonel By Drive, Ottawa, Ont, Canada K1S 5B6
Chemosphere 46:511-7. 2002..The placement of the halogen atoms on the fourth compound, C10H6N2Br3Cl3 could not be unequivocally determined since the synthesized standard could not be fully characterized...
- Geographic distribution of selected elements in the livers of polar bears from Greenland, Canada and the United StatesScott A Rush
University of Georgia, Warnell School of Forestry and Natural Resources, Athens, GA 30602 2152, USA
Environ Pollut 153:618-26. 2008..Concentrations of most elements in the polar bears did not exceed toxicity thresholds, although Cd and Hg exceeded levels correlated with the formation of hepatic lesions in laboratory animals...