Fig. 2. Schematic of a dynamic microbial model that includes intracellular C storage.

C and N compartments are shown as white and black boxes, and C storage in gray (subscripts “S”, “B”, and “ST” refer to substrate, active microbial biomass, and storage); solid and dashed arrows indicate C and N rates, respectively (U_S substrate C uptake, S and U_ST, storage C synthesis and remobilization, R_G, R_ST, and R_O, respiration associated with growth on substrate, growth on storage, and overflow processes, M_net net N mineralization, T microbial mortality).