I am a geomicrobiologist. My research explores the origin and extent of microbial life on Earth. I investigate the physiology and metabolism of microorganisms in extreme environments to define the physical limits for microbial life on Earth. I also have interest in characterizing microbe-mineral interactions in order to understand how microbial life has shaped the geosphere. Finally, I study the evolution of microbial structures under rock-forming conditions to develop novel tools for the detection of traces of life in ancient rocks. I use a combination of spectroscopic and imaging techniques – including cutting-edge synchrotron methods – to obtain information on microorganisms at various scales. My current project is a joint work between the Clarke Group (SEAS) and the Girguis Lab and is aimed at evaluating the potential for microorganisms to produce thin pyrite films for solar cell technology.
I obtained my doctoral degree in 2007 at the University of Lyon, France. I worked as a postdoctoral researcher at the Max Planck Institute for Marine Microbiology in Bremen, Germany (MARUM fellowship Oct 2008 – Oct 2011), and at the University of Tübingen (Nov 2011- Jan 2014). I joined the Girguis Lab in March 2014.
Picard A., Kappler A., Schmid G., Quaroni L., Obst M. (2015) Experimental diagenesis of organo-mineral structures formed by microaerophilic Fe(II)-oxidizing bacteria. Nature Communications, 6 : 6277
Picard A., Testemale D., Wagenknecht L., Hazael R. and Daniel I. (2015) Iron reduction by the deep-sea bacterium Shewanella profunda LT13a under subsurface pressure and temperature conditions. Frontiers in Extreme Microbiology, 5 : 796
Mewes K., Mogollon J.M., Picard A., Rühlemann C., Kuhn T., Nöthen K., Kasten S. (2014) Impact of depositional and biogeochemical processes on small scale variations in nodule abundance in the Clipperton Fracture Zone. Deep Sea Research I, 91 : 125-141
Picard A. and Daniel I. (2013) Pressure as an environmental parameter for microbial life – A review. Biophysical chemistry,183 : 30-41
Picard A., Testemale D., Hazemann J.-L., and Daniel I. (2012) The influence of high pressure on bacterial dissimilatory iron reduction. Geochimica et Cosmochimica Acta, 88 : 120-129
Picard A. and Ferdelman T.G. (2011) Linking microbial heterotrophic activity and sediment lithology in oxic, oligotrophic sub-seafloor sediments of the North Atlantic Ocean. Frontiers in Extreme Microbiology, 2: 263.
Picard A., Daniel I., Testemale, D., Letard I., Bleuet, P., Cardon, H., Oger, P. (2011) Monitoring microbial redox transformations of metal and metalloid elements under high pressure using in situ X-ray absorption spectroscopy. Geobiology, 9 :196-204.
Oger P., Daniel I., Simionovici A., Picard A. (2008) Micro-X-ray absorption near edge structure as a suitable probe to monitor live organisms. Spectrochimica Acta Part B, 63: 512-517
Picard A., Daniel I., Montagnac G. and Oger P. (2007) In situ monitoring by quantitative Raman spectroscopy of alcoholic fermentation by Saccharomyces cerevisiae under high pressure. Extremophiles, 11: 445-452
Picard A., Oger P., Daniel I., Cardon H., and Chervin J-C. (2006) A sensitive pressure sensor for diamond anvil cell experiments up to 2 GPa: FluoSpheres®. Journal of Applied Physics, 100: 034915
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