Figure 2

Microbial biomass carbon (MBC) in 2011 and 2012 along the precipitation gradient.
Values are means ± S.E., n = 6. P-6, P-4, P-2, C, P + 2, P + 4 and P + 6 represent −60%, −40%, −20%, control (ambient), +20%, +40% and +60% precipitation, respectively. Means with the same uppercase letter for 2011 or lowercase letter for 2012 are not significantly different (P > 0.05).