Figure 6.

Observed plant community overyielding as a function of community-level overyielding predicted from a three-species plant–soil feedback (PSF) model. The model was parametrized with an independent dataset, as described in the text. Community-level PSF and overyielding were calculated as the mean of community-specific species-level PSFs and species-level overyielding, respectively. Each point represents the mean value from 24 plant community–soil type combinations. Open and filled circles represent data from communities with and without nitrogen-fixing plants, respectively.