Melisande Chicoine; Pierre-Olivier Montiglio; Maikel Rosabal  - Résumé: Mining and motor vehicles traffic generated a large amount of trace metals in the atmosphere. These contaminants are hard to track in the trophic web, which make understanding their effects on animal communities hard to understand. Spider webs can be good indicators of aerosol trace metals percentage, which could make spiders a potentially good bioindicator for these contaminants...