Mercury-selenium association in antarctic seal hairs and animal excrements over the past 1,500 years
Strong positive correlations between selenium (Se) and total mercury (HgT) contents in the liver of marine mammals and mercury mine workers in modern times have been documented in numerous investigations. Herein, we report a positive correlation between Se and HgT concentrations over the past 1,500...
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| Veröffentlicht in: | Environmental toxicology and chemistry 2007-03, Vol.26 (3), p.381-381 |
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| creator | Yin, Xuebin Sun, Liguang Zhu, Renbin Liu, Xiaodong Ruan, Diyun Wang, Yuhong |
| description | Strong positive correlations between selenium (Se) and total mercury (HgT) contents in the liver of marine mammals and mercury mine workers in modern times have been documented in numerous investigations. Herein, we report a positive correlation between Se and HgT concentrations over the past 1,500 years in the seal hairs and in the lake sediments amended by seal or penguin excrements on King George Island (63 degrees 23' S, 57 degrees 00' W), West Antarctica. Because the changes in the input of Se and Hg into the marine environments of the studied sites do not seem to be synchronous, this striking correlation indicates a self-protection mechanism in Antarctic seals and penguins: Every time there is heavier Hg burden, more Se is accumulated to reduce the toxicity of Hg. This positive correlation between Hg and Se contents in the seal hairs and excrement sediments, however, becomes insignificant in the recent 50 years for unknown reasons. |
| doi_str_mv | 10.1897/06-128 |
| format | Article |
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Herein, we report a positive correlation between Se and HgT concentrations over the past 1,500 years in the seal hairs and in the lake sediments amended by seal or penguin excrements on King George Island (63 degrees 23' S, 57 degrees 00' W), West Antarctica. Because the changes in the input of Se and Hg into the marine environments of the studied sites do not seem to be synchronous, this striking correlation indicates a self-protection mechanism in Antarctic seals and penguins: Every time there is heavier Hg burden, more Se is accumulated to reduce the toxicity of Hg. This positive correlation between Hg and Se contents in the seal hairs and excrement sediments, however, becomes insignificant in the recent 50 years for unknown reasons.</description><identifier>ISSN: 0730-7268</identifier><identifier>EISSN: 1552-8618</identifier><identifier>DOI: 10.1897/06-128</identifier><identifier>PMID: 17373500</identifier><language>eng</language><publisher>United States: Blackwell Publishing Ltd</publisher><subject>Adaptation, Physiological ; Animals ; Feces - chemistry ; Food chains ; Fur Seals - physiology ; Geologic Sediments - analysis ; Hair - chemistry ; History, 20th Century ; History, 21st Century ; History, Ancient ; Lake sediments ; Marine environment ; Marine mammals ; Mercury ; Mercury - analysis ; Mercury - history ; Metals ; Nonfiction ; Research centers ; Seals ; Sediments ; Selenium ; Selenium - analysis ; Selenium - history ; Spheniscidae ; Standard deviation</subject><ispartof>Environmental toxicology and chemistry, 2007-03, Vol.26 (3), p.381-381</ispartof><rights>Copyright Alliance Communications Group, A Division of Allen Press, Inc. 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Herein, we report a positive correlation between Se and HgT concentrations over the past 1,500 years in the seal hairs and in the lake sediments amended by seal or penguin excrements on King George Island (63 degrees 23' S, 57 degrees 00' W), West Antarctica. Because the changes in the input of Se and Hg into the marine environments of the studied sites do not seem to be synchronous, this striking correlation indicates a self-protection mechanism in Antarctic seals and penguins: Every time there is heavier Hg burden, more Se is accumulated to reduce the toxicity of Hg. This positive correlation between Hg and Se contents in the seal hairs and excrement sediments, however, becomes insignificant in the recent 50 years for unknown reasons.</description><subject>Adaptation, Physiological</subject><subject>Animals</subject><subject>Feces - chemistry</subject><subject>Food chains</subject><subject>Fur Seals - physiology</subject><subject>Geologic Sediments - analysis</subject><subject>Hair - chemistry</subject><subject>History, 20th Century</subject><subject>History, 21st Century</subject><subject>History, Ancient</subject><subject>Lake sediments</subject><subject>Marine environment</subject><subject>Marine mammals</subject><subject>Mercury</subject><subject>Mercury - analysis</subject><subject>Mercury - history</subject><subject>Metals</subject><subject>Nonfiction</subject><subject>Research centers</subject><subject>Seals</subject><subject>Sediments</subject><subject>Selenium</subject><subject>Selenium - analysis</subject><subject>Selenium - 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Herein, we report a positive correlation between Se and HgT concentrations over the past 1,500 years in the seal hairs and in the lake sediments amended by seal or penguin excrements on King George Island (63 degrees 23' S, 57 degrees 00' W), West Antarctica. Because the changes in the input of Se and Hg into the marine environments of the studied sites do not seem to be synchronous, this striking correlation indicates a self-protection mechanism in Antarctic seals and penguins: Every time there is heavier Hg burden, more Se is accumulated to reduce the toxicity of Hg. This positive correlation between Hg and Se contents in the seal hairs and excrement sediments, however, becomes insignificant in the recent 50 years for unknown reasons.</abstract><cop>United States</cop><pub>Blackwell Publishing Ltd</pub><pmid>17373500</pmid><doi>10.1897/06-128</doi><tpages>1</tpages></addata></record> |
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| identifier | ISSN: 0730-7268 |
| ispartof | Environmental toxicology and chemistry, 2007-03, Vol.26 (3), p.381-381 |
| issn | 0730-7268 1552-8618 |
| language | eng |
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| source | MEDLINE; Wiley Online Library All Journals |
| subjects | Adaptation, Physiological Animals Feces - chemistry Food chains Fur Seals - physiology Geologic Sediments - analysis Hair - chemistry History, 20th Century History, 21st Century History, Ancient Lake sediments Marine environment Marine mammals Mercury Mercury - analysis Mercury - history Metals Nonfiction Research centers Seals Sediments Selenium Selenium - analysis Selenium - history Spheniscidae Standard deviation |
| title | Mercury-selenium association in antarctic seal hairs and animal excrements over the past 1,500 years |
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