Figure 4. Effects of plant species richness and soil
diversity on soil pools and processes . Relationship between soil
functions and plant species richness were explored in each soil
diversity levels at early flowering stage (pre-drought) (i), during
drought (ii), and after recovery (iii). The relationship between
observed plant richness and (a) ammonium, (b) nitrate, (c) phosphate,
(d) rate of N mineralization, and (e) acid phosphatase activity.
Significant plant richness effects were shown with regression lines.