Gwenaël Abril: Main collaborators... and friends AT EPOC Henri Etcheber Henri Etcheber is CNRS research scientist working on suspended sediment transport by rivers and organic carbon dynamics in freshwaters and estuaries. He has supervised my PhD (1996-1999) together with Michel Frankignoulle. He is now involved in all the organic part of my research. Pierre Anschutz Pierre Anschutz is Professor at the University of Bordeaux and my next door colleague at EPOC. He is a benthic biogeochemist with a long experience on diagenetic processes in marine sediments. Together, we have investigated the biogeochemical reactions occuring during redox oscillations in an estuarine fluid mud, as well as the dynamics of phosphorus in the Gironde estuary. Since 2004, we collaborate on the biogeochemistry of vegetated tidal flats in the Arcachon lagoon. Frédéric Guérin Frédéric Guérin was PhD Student (2002-2006) working on CO2 and CH4 cycles in the Petit Saut reservoir (French Guiana). I supervised his PhD together with Robert Delmas. Fred has done a great job on gas exchange rates, aerobic methane oxidation, CO2 and CH4 production by the decomposition of flooded soils, and coupled physical-biogeochemical modelling. He is now Postdoctoral fellow at the Max-Planck-Institut für terrestrische Mikrobiologie, Department of Biogeochemistry, working on methane carbon stable isotopes Marc-Vincent Commarieu Marc Commarieu is PhD Student (2003-2006) working on respiration and CO2 and O2 dynamics in the Gironde estuarine turbidity maximum. I supervise his PhD together with Henri Etcheber. Marc investigates the relationships between suspended matter and oxygen, pCO2 and total community respiration in the ETM. He has also parametrized the gaz transfer velocity in the Gironde estuary using chambers and equilibrator CO2 data. OUTSIDE EPOC Alberto Vieira Borges Alberto Borges is Research scientist at the University of Liège. We have shared the same office some years ago, when doing our PhD with Michel Frankignoulle. Alberto is a CO2 coastal oceanographer and we meet in the proximal coastal zone (estuaries and more recently mangroves). We are co-authors of several papers, among which a recent review on carbon dioxide and methane emissions from estuaries. Denis Maro Denis Maro is researcher at the IRSN (Institut de Radioprotection et Sureté Nucléaire), Laboratory of Radioecology of Cherbourg-Octeville. He is specialized in the dispersion of radioelements (14C, 3H, 131I...) in terrestrial and coastal environments. We collaborate on a project in the Loire River and estuary, where we use the 14C released by nuclear power plants as a tracer of the carbon cycle . Denis and his collaborators have also developped the eddy correlation technique for measuring air-water CO2 exchanges in the river. Sandrine Richard Sandrine Richard is research engineer and head of the Environmental chemistry group at the Hydreco Laboratory, French Guiana. She is encharged of several water quality monitoring program in French Guiana. She hosts us in her lab during our field trips at Petit Saut. We recently co-authored a technical note on in situ gas measurements there. Michel Meybeck Everybody knows Michel Meybeck... In dec. 2004, we co-organized a CarboEurope workshop on greenhouse gases emissions from the European continental hydrosphere. Robert Delmas Robert Delmas is Professor at the University of Toulouse and Head of the Laboratoire d'Aérologie. He is specialised in atmospheric chemistry with emphasis on methane emissions from tropical regions. We collaborate since 2002 on the greenhouse gases emissions from the Petit Saut Reservoir in French Guiana.

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