Community biomass and biodiversity effects in Phase I
Drought significantly decreased community biomass (Table 1, Fig. 3a). There was a significant positive relationship between plant species richness and community biomass in the ambient treatments, and no correlation was detected in the drought treatments, reflecting a plant species richness × soil moisture treatment interaction (Table 1, Fig. 3a). Driving the differences in the diversity-productivity relationships between moisture treatments, BE and CE were lower in drought compared to ambient treatments (Table 2, Fig. 4a and b). CE increased with plant species richness, while SE values were more negative with plant species richness (Table 2, Fig. 4b and c).