Correlates of mercury in fish from lakes near Clyde Forks, Ontario, Canada
| Autor: | Anton M. Scheuhammer, A.L.M. Ethier, Della E. Bond |
|---|---|
| Rok vydání: | 2008 |
| Předmět: |
Geologic Sediments
Health Toxicology and Mutagenesis chemistry.chemical_element Fresh Water Toxicology Fish measurement Littoral zone Animals Ecosystem Ontario Perch Mercury in fish biology Sulfates Ecology Fishes Pelagic zone Feeding Behavior Mercury General Medicine Hydrogen-Ion Concentration biology.organism_classification Pollution Carbon Isotopes of nitrogen Mercury (element) chemistry Environmental chemistry Surface water Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental Pollution. 154:89-97 |
| ISSN: | 0269-7491 |
| Popis: | Subsurface soils near Clyde Forks, Ontario, Canada, can have naturally high concentrations of mercury (Hg) from local geological sources. To investigate Hg in local aquatic food webs, Hg was measured in fish dorsal muscle (mainly yellow perch [YP] and pumpkinseed sunfish [PS]) and surface sediments from 10 regional lakes. Water chemistry, along with fork length, weight, and stable isotopes (delta15N, delta13C, delta34S) in fish were also measured. No lake sediments had elevated (0.3microg/g dw) Hg, and average Hg concentrations in fish were not sufficiently high (1microg/g dw) to be of concern for fish-eating wildlife. Variance in fish Hg was best explained by dietary carbon source (delta13C), and certain lake variables (e.g., pH for YP). PS with more pelagic feeding habits had higher delta34S and Hg than those with more littoral feeding habits. Potential biological linkages between fish Hg and delta34S, a parameter that may be related to the lake sulphate-reducing bacteria activity, requires further investigation. |
| Databáze: | OpenAIRE |
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