2001
DOI: 10.1039/b102683f
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Abstract: Monitoring pollutants in the biota of the Arctic is a high priority activity of the circumpolar Arctic nations. Polar bears (Ursus maritimus) are one species that have been selected for monitoring, owing to their high trophic position in the Arctic marine ecosystem and high contaminant levels. Considerable research has been directed at understanding the effects of pollutants, and ultimately these effects are tied to temporal trends in pollutant levels. This paper reports on the state of contaminant monitoring … Show more

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Cited by 52 publications
(40 citation statements)
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References 21 publications
(31 reference statements)
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“…Furthermore, in an assessment of temporal trends (1991-1999; except 1996) of CHCs in the fat of Hudson Bay polar bears, Norstrom (2000) found a significant decline in a-hexachlorocyclohexane (a-HCH), A-chlorobenzene (ACBz), and APCB, although no significant change was observed for ACHL, Adichlorodiphenyldichloroethane (ADDT), h-HCH, and dieldrin. Following this trend, concentrations of PCBs, inferred from concentrations of CB-153, in polar bear plasma collected from Svalbard were found to decline significantly during the period 1990À1998 (Henriksen et al, 2001;Derocher et al, 2003). Furthermore, Dietz et al (2004) reported recently a decline in ACHL, ADDT, APCB, and dieldrin concentrations in East Greenland polar bear fat samples collected between 1990 and 1990À2001.…”
Section: Introductionmentioning
confidence: 94%
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“…Furthermore, in an assessment of temporal trends (1991-1999; except 1996) of CHCs in the fat of Hudson Bay polar bears, Norstrom (2000) found a significant decline in a-hexachlorocyclohexane (a-HCH), A-chlorobenzene (ACBz), and APCB, although no significant change was observed for ACHL, Adichlorodiphenyldichloroethane (ADDT), h-HCH, and dieldrin. Following this trend, concentrations of PCBs, inferred from concentrations of CB-153, in polar bear plasma collected from Svalbard were found to decline significantly during the period 1990À1998 (Henriksen et al, 2001;Derocher et al, 2003). Furthermore, Dietz et al (2004) reported recently a decline in ACHL, ADDT, APCB, and dieldrin concentrations in East Greenland polar bear fat samples collected between 1990 and 1990À2001.…”
Section: Introductionmentioning
confidence: 94%
“…Studies on polar bears have reported significant oscillations of CHC concentrations throughout the years, which are quite often related to differences in biological conditions of the individuals rather than variations of CHC concentrations in the abiotic environment or in the food chain of polar bears. The likelihood of misinterpreting the data increases by not adjusting for confounding factors that vary systematically over time in a non-standardized dataset (Henriksen et al, 2001). As a result, substantial errors are introduced by means of direct comparisons between surveys of contaminants for polar bears.…”
Section: Temporal Comparisonsmentioning
confidence: 99%
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