Mercury content and isotopic composition of teeth, and sex and age of skulls of polar bears collected in Svalbard
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| Main Authors: | , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2012
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| _version_ | 1867167669614018560 |
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| author | Aubail, Aurore Dietz, Rune Rigét, Frank F Sonne, Christian Wiig, Øystein Caurant, Florence |
| author_facet | Aubail, Aurore Dietz, Rune Rigét, Frank F Sonne, Christian Wiig, Øystein Caurant, Florence |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We examined the use of mercury (Hg) and nitrogen and carbon stable isotopes in teeth of polar bear (Ursus maritimus) from Svalbard as biotracers of temporal changes in Hg pollution exposure between 1964 and 2003. Teeth were regarded as a good matrix of the Hg exposure, and in total 87 teeth of polar bears were analysed. Dental Hg levels ranged from 0.6 to 72.3 ng/g dry weight and increased with age during the first 10 years of life. A decreasing time trend in Hg concentrations was observed over the recent four decades while no temporal changes were found in the stable isotope ratios of nitrogen (d15N) and carbon (d13C). This suggests that the decrease of Hg concentrations over time was more likely due to a lower environmental Hg exposure in this region rather than a shift in the feeding habits of Svalbard polar bears. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_807120 |
| institution | PANGAEA |
| language | en |
| publishDate | 2012 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Mercury content and isotopic composition of teeth, and sex and age of skulls of polar bears collected in Svalbard Aubail, Aurore Dietz, Rune Rigét, Frank F Sonne, Christian Wiig, Øystein Caurant, Florence Biological sample; BIOS; International Polar Year (2007-2008); IPY; Svalbard; Svalbard_bear We examined the use of mercury (Hg) and nitrogen and carbon stable isotopes in teeth of polar bear (Ursus maritimus) from Svalbard as biotracers of temporal changes in Hg pollution exposure between 1964 and 2003. Teeth were regarded as a good matrix of the Hg exposure, and in total 87 teeth of polar bears were analysed. Dental Hg levels ranged from 0.6 to 72.3 ng/g dry weight and increased with age during the first 10 years of life. A decreasing time trend in Hg concentrations was observed over the recent four decades while no temporal changes were found in the stable isotope ratios of nitrogen (d15N) and carbon (d13C). This suggests that the decrease of Hg concentrations over time was more likely due to a lower environmental Hg exposure in this region rather than a shift in the feeding habits of Svalbard polar bears. |
| title | Mercury content and isotopic composition of teeth, and sex and age of skulls of polar bears collected in Svalbard |
| topic | Biological sample; BIOS; International Polar Year (2007-2008); IPY; Svalbard; Svalbard_bear |
| url | https://doi.org/10.1594/PANGAEA.807120 |