The Tropical Brown Alga Lobophora variegata (Lamouroux) Womersley: A Prospective Bioindicator for Ag Contamination in Tropical Coastal Waters
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Uptake and depuration kinetics of dissolved silver were determined in the brown alga Lobophora variegata, using radiotracer techniques. Results indicate that this widely distributed alga could be a useful bioindicator species for surveying silver contamination in tropical environments. Indeed, results showed that the alga readily concentrates silver (algal concentration of silver was 7,000 times higher than in water after a 28-day exposure) and retains it efficiently within its tissues (biological half-life: 72 ± 4 days).
KeywordsSilver Bioconcentration Coral reef ecosystems Biomonitoring
The IAEA is grateful for the support provided to its Marine Environment Laboratories by the Government of the Principality of Monaco. Authors thank P. Bustamante (LIENSs) for constructive comments on the ms and J.L. Teyssié (IAEA-MEL) for technical assistance. MW is an Honorary Senior Research Associate of the National Fund for Scientific Research (NFSR, Belgium) and holds a 2008 Invited Expert position at LIENSs, supported by the Conseil Régional de Poitou-Charentes. This work was supported by the IAEA and the French PNEC Programme (Chantier Nouvelle-Calédonie).
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