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Posidonia oceanica , a usefull tool to biomonitor the pollution of Mediterranean coastal

Posidonia oceanica , a usefull tool to biomonitor the pollution of Mediterranean coastal areas by trace elements. J. Richir, R. Biondo, J.-M. Bouquegneau, S. Gobert. Bruxelles 02-12-11. Introduction. Trace elements. pollution. Ecotoxicology. I N T R O D U C T I O N.

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Posidonia oceanica , a usefull tool to biomonitor the pollution of Mediterranean coastal

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  1. Posidonia oceanica, a usefull tool to biomonitor the pollution of Mediterranean coastal areas by trace elements J. Richir, R. Biondo, J.-M. Bouquegneau, S. Gobert. Bruxelles 02-12-11

  2. Introduction Trace elements pollution Ecotoxicology I N T R O D U C T I O N bioindicators = organisms accumulating pollutants to levels representative of their habitat pollution status. M. galloprovincialis P. oceanica

  3. Introduction Trace elements pollution Ecotoxicology I N T R O D U C T I O N bioindicators = organisms accumulating pollutants to levels representative of their habitat pollution status. M. galloprovincialis P. oceanica

  4. Introduction Trace elements biomonitoring Ecotoxicology I N T R O D U C T I O N Objectives: • [TEs] in Posidoniaoceanica- baselines • spatial variation - contamination sources • kinetics - accumulation vs. excretion • tissue speciation - preferential accumulation routes • plant physiology / seasonality vs. [TEs]

  5. Stations PACA-Corsican coasts EXAMPLE 1

  6. Bi - 18 stations PACA-Corsican coasts EXAMPLE 1

  7. Bi - Ajaccio EXAMPLE 2 H9 -H1

  8. H9 H8 H6 H5 H3 H2 H1 H4 H7 Bi - Ajaccio EXAMPLE 2 RESULTS H9 -H1

  9. H9 H8 H6 H5 H3 H2 H1 H4 H7 Bi - Ajaccio EXAMPLE 2

  10. In situ TE contamination EXAMPLE 3 • 6 days of contamination; • 15 TEs (Pb, Co, Ag, Al, Mn, etc.); • 410L bell-shaped mesocosm; • Contamination every 12 hours (9am-9pm); • 15 days of decontamination.

  11. In situ TE contamination EXAMPLE 3

  12. Pb kinetics EXAMPLE 3

  13. Tissue compartmentalization blade D E B C plagiotropic shoot orthotropic shoot leaf base (petiole) scale limb A rhizome rhizome ligula roots leaf base stipule root (A) shoot of leaves on a plagiotropic rhizome; (B, C) adult leaves; (D) intermediate leaf ; (E) juvenile leaf (Libes and Boudouresque,1987).

  14. Tissue compartmentalization - leaves EXAMPLE 4 1. V 2. Zn • Hypotheses: • water column accumulation • residence time • dilution effect IL 157± 7 18,7 ± 5,8 BAL SAL

  15. Above- vs. bellow-ground tissues EXAMPLE 5

  16. Plant physiology - shoot weight vs. V EXAMPLE 6

  17. Plant physiology - shoot weight vs. V • [TEs] in Posidoniaoceanica • spatial variation - contamination sources - baselines • e.g. Bi : PACA-Corsicancoasts and Ajaccio Bay • kinetics - accumulation vs. excretion • e.g. Pb • tissue speciation - preferential accumulation routes • e.g. V, Zn • plant physiology / seasonality vs. [TEs] • e.g. V vs. shoot weight CONCLUS IONS

  18. QUEST IONS Thank you for your attention

  19. Introduction fluxes; spatial distribution; speciation, balances, … Geophysicochemistry I N T R O D U C T I O N Trace elements ecosystems; organisms. Ecology flickr.com adverse effects; pollution, … Ecotoxicology newsvine.com corsematin.com

  20. Laboratory analyses M A T E R I A L - METHODS • Analytical steps: • homogeneous sample • acidic digestion in a microwave oven • measures : • inductively coupled plasma mass spectrometer adult leaves shoots 1/6/9 Calvi Ethos D ELAN DRCII

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