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Temporary planningSILICAMICS "Biogeochemistry and genomics of silicification and silicifiers" 21-25 September 2015 in Centre de la Mer de l'Aber-Wrac'h (30 km from Brest), France Monday 21 September 2015 14:00 - 19:30: Arrival of participants and installation of the poster session for the week 19:30 - 21h30: Cocktail Tuesday 22 September 2015 9:00 - 09:05- Welcome speech by Aude Leynaert (IUEM, Brest, France) General Introduction (40 mn talk + 20 mn questions) 09:10 - 10:10 - Chris Bowler (ENS, Paris, France) - Genomics: Enable exploration of the secrets of marine diatoms 10:10 - 10:40 : Coffee break 10:40 - 11:40 - Paul Tréguer (IUEM, Brest, France) - The world ocean silica cycle: knowns and unknowns 11:40 - 12:40 - Colomban de Vargas (SBR, Roscoff, France) and Alan Marron (Cambridge, UK) - Evolution of silicifiers (the great picture)
12:45 - 14:00 Lunch
Session 1: Silicification (processes and properties) in diatoms 14:00 - 14:40 - Pascal Jean Lopez / Jacques Livage - General introduction. Principe of silicon biomineralization and impacts of environmental factors Oral communications: 14:40 - 15:00 - Brivaëla Moriceau (IUEM, Brest, France) - Impact of growth stress on diatom BSiO2 recycling 15:00 - 15:20 - Jacques Livage/Sophie Cassaignon (Collège de France, Paris, France) -Photonic cristal properties of diatoms frustule and sponge spicules 15:20 - 15:40 - Paul Curnow (Bristol University, UK) - Molecular studies of diatom silicic acid transporters 15:40 - 16:10: Coffee break
Session 2: Silicification in other silicifiers 16:10 - 16:50 - S. Baines (Bigelow, USA) and M. Maldonado (CSIC, CEAB, Spain) - General introduction Oral communications: 16:50 - 17:10 - Manuel Maldonado (CSIC, CEAB, Spain) - The contribution of sponges to the marine silicon cycle 17:10 - 17:30 - Taniel Danelian (Université de Lille 1, France) - Silicifying radiolarians: a brief biological, oceanographic and taphonomic overview 17:30 - 17:50 - Stephen Baines (Bigelow, USA) - A role for the cyanobacterium, synechococcus, in the marine silicon cycle 18:00 - 19:00: Working Group for students 19:30: Dinner
Wednesday 23 September 2015 Session 3: Genomics/proteomics as tools for silicifiers 08:30 - 09:10 - Chris Bowler (ENS, Paris, France) - General introduction - Oral communications: 09:10 - 09:30 - Peter Kroth (University of Konstanz, Germany) - Molecular tools to study benthic diatom communities 09:30 - 09:50 - Mark Hildebrand, Sarah Lerch (SIO, USA) - Identification and comparison of silicification genes in diatoms. 09:50 - 10:10 - Kim Thamatrakoln (Rutgers University, NJ, USA) - Linking physiological and molecular aspects of diatom silicification 10:10 - 10:30 - Andrew Allen (J. Craig Venter Institute, La Jolla, USA) - Comparative and functional genomics of eukaryotic marine phytoplankton 10:30 - 11:00: Coffee break Session 4: A biogeochemical/genomic approach for ecosystems modelling Oral communications 11:40 - 12:00 - Olivier Aumont (LOCEAN, Paris, France), F. Diaz, (MIO, Marseille, France) - Representing autotrophs silicifiers in Plankton Functional Types models – Application to the Northwestern Mediterranean Sea 12:00 - 12:20 - Markus Pahlow (GEOMAR, Kiel, Germany) - Optimality-based view on phytoplankton and Si: how is silicification regulated and what is its role in phytoplankton succession? 12:20 - 12:40 - Christopher Algar (Dalhousie University, Halifax, NS, Canada) - Approaches for integrating genomic data and biogeochemical models
Session 5: Isotope chemistry providing tools for processes and fluxes Oral communications: 15:10 - 15:30 - Jill Sutton (IUEM, Brest, France) - Silicon isotopes and diatoms in culture studies 15:30 - 15:50 - Patricia Grasse (GEOMAR, Kiel, Germany) - What controls the silicon isotope signature of biogenic silica? 15:50 - 16:10 - Luc André, Camille Delvigne - (Royal Museum for Central Africa, Belgium) The Si-Mg isotopic compositions of the Juan de Fuca ridge low temperature hydrothermal fluids and the Si fluxes from the off-axis rock-water interactions 16:10 - 16:40: Coffee break 16:40 - 17:00 - Stefan Lalonde (IUEM, Brest, France) - The Ge isotopic composition of seawater: First depth profiles (Southern Ocean) and estimated fractionation between seawater and biogenic opal
19:30: Banquet Thursday 24 September 2015 Session 6 : The silica cycle: key players and processes 8:30 - 9:10 - Bernard Quéguiner (MIO, Marseille, France) - General introduction - Reflections on the role of silicifiers in oceanic biogeochemical cycles - conceptual approaches and research prospectives Session 6a : Coastal ecosystems Oral communications: 09:10 - 09:30 - Aude Leynaert (IUEM, France) - Benthic versus pelagic diatoms 09:30 - 09:50 - Patricia Glibert (University of Maryland, USA) - The success of diatoms: the nitrogen perspective. 09:50 - 10:10 - Dan Conley (University of Göteborg, Sweden) - The Global Si Cycle: Variable inputs into the oceans and possible changes in the Si cycle through geologic time. 10:10 - 10:40: Coffee break 10:40 - 11:00 - Michalopoulos Panagiotis (HCMR, Athens, Greece) - Early diagenesis of silica reverse weathering in marine sediments: biological controls and interactions with organic carbon cycling and preservation 11:00 - 11:20 - Olivier Ragueneau (IUEM, Brest, France) - Si cycle and the coastal zone: what about Man in this story?
Session 6b: Open ocean ecosystems Oral communications 11:20 - 11:40 - Dave Nelson (IUEM, Brest, France) - Diatom strategies for persistence, growth and reproduction in the eastern equatorial Pacific: avoidance of nutrient limitation vs bloom-and-burst 11:40 - 12:00 - Séverine Alvain (LOG, Lille, France) - Phytoplankton detection from space based on the synergy between ocean colour and in situ observations: principles and perspectives
12:30 - 14:00 Lunch
14:00 - 14:20 - Akira Kuwata (Japan) and Daniel Vaulot (Station Biologique de Roscoff, France) - Parmales and Bolidophyceae, a picoplankton group closely related to diatoms 14:20 - 14:40 - Marine Lasbleiz and Bernard Quéguiner (MIO, Marseille, France) - Interspecific variability of silicifying activity among dominant diatoms of the phytoplankton community in the Southern Ocean (KEOPS 2 project) 14:40 - 15:00 - Jeffrey Krause (USA, Alabama, USA) - Quantitative determination of group-specific Si uptake in field diatom assemblages 15:00 - 15:20 - Soumaya Boussabat (MIO, Marseille, France) - Different scales of variability of the elemental composition C/ N /P/ Si of diatoms across the Gulf of Lion, north-western Mediterranean 15:20 - 15:40 - Richard Dugdale (Romberg Tiburon Center, San Francisco, USA) - Silicate pumping of excess carbon in coastal upwelling ecosystems 15:40 - 16:10: Coffee break 16:10 - 17:10: Working Group for students 17:10 - 18:40 - Aude Leynaert, Brivaela Moriceau and Paul Tréguer (IUEM, Brest, France) - General discussion ; new initiatives to help for the convergence of biogeochemistry and genomics on silicification and silicifiers. 19:30: Dinner
Friday 25 September 2015 8:30 - 10:30: Students restitution of day 1,2 and 3 and writing of the conference report to be edited by the Labex. 10:45 - departure time for the shuttles
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