Difference between revisions of "Methylmercury"
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== Notes == | == Notes == | ||
| − | While inorganic mercury is the dominant form, most mercury which accumulates in [[benthic]] invertabrates and [[Pollution and benthic fishes| fish]] is methylmercury. Unlike most other metals, methylmercury [[biomagnification|biomagnifies]] through the food chain. As such methylmercury is expected to be most hazardous for organisms on the top of the food chain. So contain high trophic level carnivorous fish (like mackerel and tuna) to contain 10.000 times more methylmercury than the surrounding environment. Species eating these fish ([[minamata disease|humans]],[[Pollution and sea birds|Sea birds]] and [[Pollution and marine mammals|marine mammals]] are expected to have even more problems. However while this holds true for humans, marine birds and marine mammals appear to be quite resistant towards methylmercury accumulation. | + | While inorganic mercury is the dominant form, most mercury which accumulates in [[benthic]] invertabrates and [[Pollution and benthic fishes| fish]] is methylmercury. Unlike most other metals, methylmercury [[biomagnification|biomagnifies]] through the food chain. As such methylmercury is expected to be most hazardous for organisms on the top of the food chain. So contain high trophic level carnivorous fish (like mackerel and tuna) to contain 10.000 times more methylmercury than the surrounding environment. Species eating these fish ([[minamata disease|humans]],[[Pollution and sea birds|Sea birds]] and [[Pollution and marine mammals|marine mammals]]) are expected to have even more problems. However while this holds true for humans, marine birds and marine mammals appear to be quite resistant towards methylmercury accumulation. |
Humans acquire methylmercury through consumption of fish and mussels. Usually this doesn't pose any health risks, although high consumption of predatory fish (with high mercury content) by pregnant women, might pose problems for the young and [http://www.nrdc.org/health/effects/mercury/walletcard.pdf unborn babies.] You can also verify whether the fish you eat has been caught in a [http://www.goedevis.nl/Englishpage/view sustainable manner].<ref>http://www.lenntech.com/Periodic-chart-elements/Hg-en.htm</ref> | Humans acquire methylmercury through consumption of fish and mussels. Usually this doesn't pose any health risks, although high consumption of predatory fish (with high mercury content) by pregnant women, might pose problems for the young and [http://www.nrdc.org/health/effects/mercury/walletcard.pdf unborn babies.] You can also verify whether the fish you eat has been caught in a [http://www.goedevis.nl/Englishpage/view sustainable manner].<ref>http://www.lenntech.com/Periodic-chart-elements/Hg-en.htm</ref> | ||
Revision as of 12:39, 24 July 2009
Notes
While inorganic mercury is the dominant form, most mercury which accumulates in benthic invertabrates and fish is methylmercury. Unlike most other metals, methylmercury biomagnifies through the food chain. As such methylmercury is expected to be most hazardous for organisms on the top of the food chain. So contain high trophic level carnivorous fish (like mackerel and tuna) to contain 10.000 times more methylmercury than the surrounding environment. Species eating these fish (humans,Sea birds and marine mammals) are expected to have even more problems. However while this holds true for humans, marine birds and marine mammals appear to be quite resistant towards methylmercury accumulation.
Humans acquire methylmercury through consumption of fish and mussels. Usually this doesn't pose any health risks, although high consumption of predatory fish (with high mercury content) by pregnant women, might pose problems for the young and unborn babies. You can also verify whether the fish you eat has been caught in a sustainable manner.[2]
Methylmercury causes nerve damage in most species at much lower concentrations than inorganic mercury.
References
- ↑ Lawrence E (ed.), 2000. Henderson’s Dictionary of Biological Terms. 12th edition. Prentice Hall, Pearson Education Limited. Harlow, Great Britain.
- ↑ http://www.lenntech.com/Periodic-chart-elements/Hg-en.htm
- ↑ ↑ Kennish, M. J. (1996): Practical Handbook of Estuarine and Marine Pollution, CRC Press 524 pp
