(Table 2) Mercury concentration in hair of Northwest Greenland polar bears (Ursus maritimus)
Citation
Dietz R, Born E W, Rigét F F, Aubail A, Sonne C, Drimmie R, Basu N (2011). (Table 2) Mercury concentration in hair of Northwest Greenland polar bears (Ursus maritimus). PANGAEA - Data Publisher for Earth & Environmental Science. Occurrence dataset https://doi.org/10.1594/pangaea.808872 accessed via GBIF.org on 2024-12-06.Description
Hair samples from 117 Northwest Greenland polar bears (Ursus maritimus) were taken during 1892-2008 and analyzed for total mercury (hereafter Hg). The sample represented 28 independent years and the aim of the study was to analyze for temporal Hg trends. Mercury concentrations showed yearly significant increases of 1.6-1.7% (p < 0.0001) from 1892 to 2008 and the two most recent median concentrations from 2006 and 2008 were 23- to 27-fold higher respectively than baseline level from 1300 A.D. in the same region (Nuullit). This indicates that the present (2006-2008) Northwest Greenland polar bear Hg exposure is 95.6-96.2% anthropogenic in its origin. Assuming a continued anthropogenic increase, this model estimated concentrations in 2050 and 2100 will be 40- and 92-fold the baseline concentration, respectively, which is equivalent to a 97.5 and 98.9% man-made contribution. None of the 2001-2008 concentrations of Hg in Northwest Greenland polar bear hair exceeded the general guideline values of 20-30 µg/g dry weight for terrestrial wildlife, whereas the neurochemical effect level of 5.4 µg Hg/g dry weight proposed for East Greenland polar bears was exceeded in 93.5% of the cases. These results call for detailed effect studies in main target organs such as brain, liver, kidney, and sexual organs in the Northwest Greenland polar bears.
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Animaliarank: kingdom
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Chordatarank: kingdom
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Rune Dietzoriginator
Erik W Born
originator
Frank F Rigét
originator
Aurore Aubail
originator
Christian Sonne
originator
R Drimmie
originator
Nandini Basu
originator
metadata author
PANGAEA - Data Publisher for Earth & Environmental Science
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