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Mercury concentrations in landlocked Arctic char (Salvelinus alpinus) from the Canadian Arctic. Part II: Influence of lake biotic and abiotic characteristics on geographic trends in 27 populations by Nikolaus Gantner; Derek C. Muir; Michael Power; Deborah Iqaluk; James D. Reist; John A. Babaluk; Markus Meili; Hans Borg; Johan Hammar; Wendy Michaud; Brian Dempson; Keith R. Solomon is a Environmental Science article available to read on EtoBox.

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## Abstract Among‐lake variation in mercury (Hg) concentrations in landlocked Arctic char was examined in 27 char populations from remote lakes across the Canadian Arctic. A total of 520 landlocked Arctic char were collected from 27 lakes, as well as sediments and surface water from a subset of lakes in 1999, 2002, and 2005 to 2007. Size, length, age, and trophic position (δ^15^N) of individual char were determined and relationships with total Hg (THg) concentrations investigated, to identify a common covariate for adjustment using analysis of covariance (ANCOVA). A subset of 216 char from 24 populations was used for spatial comparison, after length‐adjustment. The influence of trophic position and food web length and abiotic characteristics such as location, geomorphology, lake area, catchment area, catchment‐to‐lake area ratio of the lakes on adjusted THg concentrations in char muscle tissue were then evaluated. Arctic char from Amituk Lake (Cornwallis Island) had the highest Hg concentrations (1.31 μg/g wet wt), while Tessisoak Lake (Labrador, 0.07 μg/g wet wt) had the lowest. Concentrations of THg were positively correlated with size, δ^15^N, and age, respectively, in 88, 71, a

Who reads Mercury concentrations in landlocked Arctic char (Salvelinus alpinus) from the Canadian Arctic. Part II: Influence of lake biotic and abiotic characteristics on geographic trends in 27 populations?

Author

Nikolaus Gantner; Derek C. Muir; Michael Power; Deborah Iqaluk; James D. Reist; John A. Babaluk; Markus Meili; Hans Borg; Johan Hammar; Wendy Michaud; Brian Dempson; Keith R. Solomon

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); Wiley-Blackwell; Wiley; Research Square (ISSN 0730-7268)

Published

2010

Language

EN

Field

Environmental Science (Physical Sciences)