The Laboratory for Oceanology Sylvie Gobert PhD Chef de Travaux http://www.ulg.ac.be/oceanbio/
One academic Five permanent scientists One post-doctoral fellow Ten PhD students Around 1 Master students per year
C,N,P cycle Food Web Mediterranean, Atlantic, North sea, Seagrass, Marine vertebrate, invertebrate, plankton Marine ecology Marine ecotox Trace elements Pollutants Modelling
C,N,P cycle Food Web Marine ecology The ratio of the two stable isotopes in natural materials varies during: physical, chemical and biological processes.5 1 Carnivorous mammal Trophic position δ 15 N 1 3 Fish Zooplancton Algae δ 13 C indicator of primary productivity
Marine ecotox Trace elements Pollutants Trace elements Définition : Eléments chimiques en faibles quantités dans les sols, les plantes, les animaux et l homme PREMIER GROUPE Eléments traces classiques Cd, Ni, Cu, Zn, Cr, Pb, Fe DEUXIEME GROUPE Eléments traces «émergents» Be, Al, V, Mn, Sb, As, Bi, Se, Mo, Ag, Sn
C,N,P cycle Food Web An isotopic ratio mass spectrometer (Optima, Micromass, UK) coupled to a C- N-S elemental analyser (Carlo Erba, Italy). Spectromètre de masse (IRMS) (DELTA V advantage) Chromatographe en phase gazeuse (GC)(GC IsoLink for C and N) Interface GC- IRMS (ConFLO IV Universal Interface)
Trace elements Phtalates,PCB, Triclosan Inductively coupled plasma mass spectrometry ICP-MS ICP-MS ELAN DRC II, Perkin Elmer Be, Al, V, Mn, Co, As, Se, Mo, Ag, Sn, Sb, Bi Cr, Fe, Ni, Cu, Zn, Cd Pb Hg MiIlestone DMA-8 Direct Mercury Analyzer
powder EA-IRMS sample Ethos D Microwave assisted digestion Direct Mercury analyzer ELAN DRCII
MARQUE PAGE Figure 2 : Répartition des stations retenues le long du littoral Corse et de la région en relation avec la qualité de leurs eaux sur base du PREI (Gobert et al. sous presse).
Be Al V Cr Be (ppm).125.1.75.5.25 Al (ppm) 2 15 1 5 V (ppm) 3 2 1 Cr (ppm) 1.25 1..75.5.25.. Mn Fe Co Ni 125 25 6 6 Mn (ppm) 1 75 5 25 Fe (ppm) 2 15 1 5 Co (ppm) 4 2 Ni (ppm) 4 2 Cu (ppm) 25 2 15 1 5 Cu Zn (ppm) 15 14 13 12 2 1 Zn As (ppm) 11 1 9 4 3 2 1 As Se (ppm).4.3.2.1. Se Mo Pd Ag Cd Mo (ppm) 4 3 1 5 Pd (ppm).25.2.15.1.5 Ag (ppm) 2 1 Cd (ppm) 5 4 3 2 1. Sn (ppm) 24 16 8.1.5 Sn Sb (ppm).9.8.7.6.3.2.1 Sb Pb (ppm) 6 4 2 Pb Bi (ppm).6.4.2 Bi... Figure 4 : Teneurs en éléments traces (moyenne écart-type, ppm) des faisceaux de P. oceanica pour les 18 stations échantillonnées.
Pollutant impact Environnemental contamination Diet (δ 13 C and δ 15 N) Northern Elephant seal Mirounga angustirostris Early lactation ~ 25 days x 1/3 Late lactation x 4 But also key-period Migration Gestation Lactation Spawning Fasting (linked to lactation, molting, migration)
Research projects DISCRIMINATION OF MERCURY SOURCES IN MARINE VERTEBRATES STAtion of Reference and research on Change of local and global Anthropogenic Pressures on Mediterranean Ecosystems Drifts Rapid Assessment of the Marine Coastal Environment Définition précoce de a pollution en milieu marin Implications of Posidonia litter accumulations, and their associated microbial and detritivorous communities, in the carbon cycle of an oligotrophic marine coastal area. MedSea : Mediterranean Sea Acidification in a changing climate
Contact information Sylvie.gobert@ulg.ac.be (Sylvie Gobert) Krishna.das@ulg.ac.be (Krishna Das) G.Lepoint@ulg.ac.be (Gilles Lepoint) M.Grégoire@ulg.ac.be (Marilaure Grégoire) A.Goffart@ulg.ac.be (Anne Goffart) http://www2.ulg.ac.be/oceanbio/
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