Figure legends
Figure 1 Schematic depiction of the experimental design. The
study combined a PSF experiment and a plant diversity-productivity
relationship experiment. In the soil conditioning phase (Phase I), plant
communities with a range of species richness levels grew in homogeneous
soils, and soil microbial communities were trained by the plant
communities. In the response phase (Phase II), newly established plant
communities grew with soil inoculums which the same plant communities
conditioned.
Figure 2 (a) RDA analysis showing how plant species richness
and soil moisture content influenced species compositions of soil
bacterial and fungal communities in Phase I. SR, plant species richness;
SMC, soil moisture content. Effects of plant diversity and soil moisture
treatments on (b) bacterial diversity, (c) fungal diversity, (d) AMF OTU
richness, (e) AMF relative abundance, (f) fungal pathogen OTU richness
and (g) fungal pathogen relative abundance. Means and SE are given.
Solid lines indicate significant correlations between plant species
richness and microbial variables (P < 0.05).
Figure 3 Plant diversity-productivity relationships in the (a)
Phase I and (b) II under different soil moisture treatments. The solid
lines indicate fitted lines for plant diversity-productivity
relationships, and the grey areas indicate the 95% confidence
intervals. The dashed line indicates an insignificant correlation
(P > 0.05). Letter codes indicate Phase I-Phase II
soil moisture treatments: A-A = Ambient-Ambient; A-D = Ambient-Drought;
D-A = Drought-Ambient; D-D = Drought-Drought.
Figure 4 Net biodiversity, complementarity and selection
effects at different species richness levels in Phases I (a, b, c) and
II (d, e, f). Means and SE are given. Letter codes indicate Phase
I-Phase II soil moisture treatments: A-A = Ambient-Ambient; D-A =
Drought-Ambient; A-D = Ambient-Drought; D-D = Drought-Drought.