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).
- Eisler R (1996) Silver hazards to fish, wildlife and invertebrates: a synoptic review. U.S. Department of the Interior, Washington DC, USAGoogle Scholar
- Gorsuch JW, Kramer JR, La Point TW (eds) (2003) Environmental transport, fate, and models: papers from environmental toxicology and chemistry, 1983–2002. SETAC Press, Pensacola, p 544Google Scholar
- Hédouin L, Bustamante P, Fichez R, Warnau M (2008) The tropical brown alga Lobophora variegata as a bioindicator of mining contamination in the New Caledonian lagoon: a field transplantation study. Mar Environ Res. doi: 10.1016/j.marenvres.2008.07.005
- Langston WJ, Burt GR (1994) Bioindicators of Ag availability in UK estuaries In: Andren AW, Bober TW (eds) Proceedings, 2nd Argentum international conference on the transport, fate and effects of silver in the environment, University of Wisconsin-Madison, WI, USA, pp 125–130Google Scholar
- Silver Institute (2003) World silver survey. The Silver Institute, Washington DC, USAGoogle Scholar
- Targett NM, Coen LC, Boettcher AA, Tanner CE (1992) Biogeographic comparisons of marine algal polyphenolics: evidence against a latitudinal trend. Oecologia 89:464–470Google Scholar