Modeling mercury concentrations in northern pikes and walleyes from frequently fishes lakes of Abitibi-Témiscamingue (Québec, Canada): a GIS approach

Beaulne, Jean-Sébastien; Lucotte, Marc; Paquet, Serge et Canuel, René (2012). « Modeling mercury concentrations in northern pikes and walleyes from frequently fishes lakes of Abitibi-Témiscamingue (Québec, Canada): a GIS approach ». Boreal Environment Research, 17(3-4), pp. 277-290.

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Résumé

Using readily available geospatial data and statistical analyses we constructed models to predict mercury concentrations in northern pikes (Esox lucius) and walleyes (Stizostedion vitreum) in lakes frequently used by sport fishers, urban anglers and subsistance fishers in the Abitibi-Témiscamingue region (Canada). Mercury concentrations in northern pikes were predicted with 74% accuracy using three variables: lake order, fraction of the lake watershed with gentle to moderate slopes (steepness 2%–6%) and the fraction of the watershed with mature forest cover. To construct the walleye model, we divided lakes into 3 categories: (1) lakes with mines or mine tailings located less than 1 km away from the shore; (2) lakes located on the Lake Ojibway-Barlow clay plain; and (3) lakes outside the clay plain. For watersheds without mines, walleye Hg concentrations were predicted with over 77% accuracy using the fraction of wetlands in the watershed.

Type: Article de revue scientifique
Mots-clés ou Sujets: Mercury concentrations, Northern pikes, Walleyes, Abitibi-Témiscamingue, GIS
Unité d'appartenance: Centres institutionnels > Centre de recherche en géochimie et géodynamique (GEOTOP)
Faculté des sciences > Département des sciences de la Terre et de l'atmosphère
Instituts > Institut des sciences de l'environnement (ISE)
Déposé par: Marc Michel Lucotte
Date de dépôt: 01 déc. 2015 14:07
Dernière modification: 19 avr. 2016 17:53
Adresse URL : http://www.archipel.uqam.ca/id/eprint/7552

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