IGN 19-6 - Linking microbial physiology and biogeochemical dynamics through individual-based modeling

Thursday, August 10, 2017
C123, Oregon Convention Center
Christina Kaiser, Department of Microbiology and Ecosystem Science, University of Vienna, Vienna, Austria; Evolution and Ecology Program, International Institute for Applied System Analysis, Sarah E. Evans, Kellogg Biological Station and Dept of Integrative Biology, Michigan State University, Hickory Corners, MI, Ulf Dieckmann, Ecology And Evolution Program, International Institute for Applied Systems Analysis and Stefanie Widder, Research Center for Molecular Medicine, Austrian Academy of Sciences, Vienna, Austria; Konrad Lorenz Institute for Evolution and Cognition Research, Klosterneuburg, Austria
Recent research suggests that certain physiological traits of soil microbes, such as the efficiency of converting plant detritus into microbial biomass, or efficiency of extracellular enzymes, influence C and N content of the soil at the steady state. Using individual-based, stoichiometrically explicit, microbial community modelling we show that spatial self-organization of microbes and substrates, emerging from microbial interactions at the microscale, represents a factor of a new quality which can significantly affect soil C and N buildup. Such phenomena are however rarely taken into account in microbial soil organic matter turnover models, and are difficult to observe experimentally.