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Forest Ecosystems
Fig. 5 | Forest Ecosystems

Fig. 5

From: Effects of simulated acid rain on soil respiration and its component in a mixed coniferous-broadleaved forest of the three gorges reservoir area in Southwest China

Fig. 5

Variation in microbial biomass under the different treatments (A–B); and variation in soil enzyme activities under different treatments (C–D). Vertical bars represent standard errors (n = 4). Different lowercase letters indicate significant difference between treatments (P < 0.05). URE indicates urease activity; SUC indicate sucrase activity; UTCK, UT4.0, UT3.25, and UT2.5 indicate the control, pH 4.0, pH 3.25, and pH 2.5 simulated acid rain in the untrenched plots, respectively; and TCK, T4.0, T3.25, and T2.5 indicate the control, pH 4.0, pH 3.25, and pH 2.5 simulated acid rain in the trenched plots, respectively

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