Figure 3. The ratio of fungal to bacterial PLFAs in 2011 and 2012 and their two-year averages along the precipitation gradient.

Values are means ± S.E., n = 6 for each year and 12 for both years. 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 letter are not significantly different (P > 0.05).