Figure 2

Relative abundance of C. saccharolyticus (black bars) and C. kristjanssonii (grey bars) in the co-culture on glucose and xylose (4 g L^-1; 1:1) at pH 6.7 and 70°C at the end of the batch start-up phase and during steady state growth at two different dilution rates. Values expressed are the means of real-time PCR duplicates that varied by less than 10%. The figure is a representative of the population dynamics in two independent chemostat cultures.