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Low and declining mercury in arctic Russian rivers.

https://arctichealth.org/en/permalink/ahliterature264135
Source
Environ Sci Technol. 2014;48(1):747-52
Publication Type
Article
Date
2014
Author
Leandro Castello
Alexander V Zhulidov
Tatiana Yu Gurtovaya
Richard D Robarts
Robert M Holmes
Daniel A Zhulidov
Vladimir S Lysenko
Robert G M Spencer
Source
Environ Sci Technol. 2014;48(1):747-52
Date
2014
Language
English
Publication Type
Article
Keywords
Animals
Arctic Regions
Environmental monitoring
Gadiformes
Mercury - analysis
Rivers - chemistry
Russia
Water Pollutants, Chemical - analysis
Abstract
Mercury (Hg) dynamics in the Arctic is receiving increasing attention, but further understanding is limited by a lack of studies in Russia, which encompasses the majority of the pan-Arctic watershed. This study reports Hg concentrations and trends in burbot (Lota lota) from the Lena and Mezen Rivers in the Russian Arctic, and assesses the extent to which they differ from those found in burbot in arctic rivers elsewhere. Mercury concentrations in burbot in the Lena and Mezen Rivers were found to be generally lower than in 23 other locations, most of which are in the Mackenzie River Basin (Canada). Mercury concentrations in burbot in the Lena and Mezen Rivers also were found to have been declining at an annual rate of 2.3% while they have been increasing in the Mackenzie River Basin at annual rates between 2.2 and 5.1% during roughly the same time period. These contrasting patterns in Hg in burbot across the pan-Arctic may be explained by geographic heterogeneity in controlling processes, including riverine particulate material loads, historically changing atmospheric inputs, postdepositional processes, and climate change impacts.
PubMed ID
24358967 View in PubMed
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