Fig. 4. The unique contribution (adjusted R²) of host plant identity to phyllosphere bacterial structure decreases over time for plants with neighbors.

Unique contribution was calculated by partitioning out spatial principal coordinates using RDA-based variation partitioning. The order of depiction of the neighbor plant species is by estimated neighborhood biomass from lowest to highest. Boxes 1–3 represent different harvest time points. In cases where R_adj = 0, host species identity did not significantly explain variation in phyllosphere bacterial composition.