Table S1. Table of type 3 tests of fixed effects for factors included in a mixed effects model predicting exotic relative abundance based on SITE and N fertilization status.

Table S2. Results from a multivariate PERMANOVA analysis performed at two scales, testing how ORIGIN and N fertilization influence the relative abundances of functional traits among seven SITES containing exotic species.

Table S3. Relative abundance of each trait within the native and exotic communities in each experiment.

Table S4. Traits that differ between the native and exotic plant communities at each site.

Table S5. Pearson correlation coefficients between each trait and PCA axis scores displayed in Fig. 2.

Table S6. Statistical output for linear mixed model analysis predicting exotic relative abundance.

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