Heavy metal contents in whitefish (Coregonus lavaretus) along a pollution gradient in a subarctic watercourse
| Autor: | Alexander N. Kashulin, Nikolay A. Kashulin, Irina M. Koroleva, Karl Øystein Gjelland, Rune Knudsen, Vladimir Dauvalter, Per-Arne Amundsen, Sergey S. Sandimirov, Petr Terentjev |
|---|---|
| Rok vydání: | 2011 |
| Předmět: |
Pollution
Geologic Sediments Biomagnification media_common.quotation_subject Fresh Water Environmental pollution Scandinavian and Nordic Countries Management Monitoring Policy and Law food Coregonus lavaretus Metals Heavy Water Pollution Chemical Animals Ecotoxicology General Environmental Science media_common food.dish Ecology Pelagic zone General Medicine Subarctic climate Bioaccumulation Metallurgy Environmental science Salmonidae Water Pollutants Chemical Environmental Monitoring |
| Zdroj: | Environmental Monitoring and Assessment. 182:301-316 |
| ISSN: | 1573-2959 0167-6369 |
| Popis: | Metallurgic industry is a source of serious environmental pollution related to the emission of heavy metals. Freshwater systems are focal points for pollution, acting as sinks for contaminants that may end up in fish and humans. The Pasvik watercourse in the border area between Finland, Norway and Russia is located in the vicinity of the Pechenganickel metallurgic enterprises, and the lower part of the watershed drains the Nikel smelters directly through Lake Kuetsjarvi. Heavy metal (Ni, Cu, Cd, Zn, Pb and Hg) concentrations in environment (water and sediments) and whitefish Coregonus lavaretus tissue (gills, liver, kidney and muscle) were contrasted between five lake localities situated along a spatial gradient of increasing distance (5-100 km) to the smelters. The heavy metal concentrations, in particular Ni, Cu and Cd, were highly elevated in Kuetsjarvi, but steeply declined with increasing distance to the smelters and were moderate or low in the other four localities. The study demonstrates that the majority of metal emissions and runoffs are deposited near the pollution source, and only moderate amounts of the heavy metal contaminants seem to be transported at further distances. Bioaccumulation of Hg occurred in all investigated tissues, and higher Hg concentrations in planktivorous versus benthivorous whitefish furthermore indicated that pelagic foraging is associated with higher levels of Hg biomagnification. Potential population ecology impacts of high heavy metal contaminations where mainly observed in whitefish in Kuetsjarvi, which showed depletions in growth rate, condition factor and size and age at maturation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink