Appendix  S1 References of the 117 studies included in the meta-analysis.

Appendix  S2 Funnel-plot of effect sizes (Hedges’ d) of the raw data against the average sample size of the invasive and non-invasive species compared.

Appendix  S3 Table with heterogeneity (Qb) and its significance between levels of the different factors of interest for each trait category.

Appendix  S4 Table with mean effect sizes and heterogeneity therein among taxonomic classes for each of the six trait categories.

Appendix  S5 Meta-analysis on subset of data including only pairs of confamilial invasive and non-invasive native species of similar growth form.

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