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PT12 Metals and Bioaccumulation
(PT150) Trophic assimilation of silver cadmium in a terrestrial isopod: The influence of speciation.
Calhoa, C. F.1, Mann, R. M.1, Soares, A. M. V. M.1, 1 Department of Biology - University of Aveiro., Aveiro, Portugal
ABSTRACT- Toxicity as a consequence of trophic transfer through the food chain remains a largely unexplored area of ecotoxicology. We examined the assimilation of cadmium by the terrestrial isopod Porcellio dilitatus in feeding trials with contaminated lettuce leaves. Isopods were fed one of 3 food treatments - 1. lettuce leaves topically contaminated with Cd(NO3)2, 2. lettuce leaves from plants grown in hydroponic growth media augmented with 100 nM Cd(NO3)2, and 3. uncontaminated lettuce leaves. Differences in Cd assimilation efficiency are likely due to Cd speciation and complexation of Cd in lettuce leaves. This work was funded through a research grant from the Portuguese Foundation for Science & Technology (FCT).
Key words: Cadmium, Trophic transfer, Assimilation efficiency, Porcellio dilatatus
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