Significant relationships (P < 0.05) between leafy spurge cover and community weighted trait means in the single-site (a, d) and multi-site surveys (b, c, e, f). In the single-site survey, root diameter declined (a) and specific root length (SRL) increased (d) with leafy spurge abundance. In the multi-site survey, the relationship between leafy spurge cover and average height was dependent on both the leafy spurge management strategy (b) and whether the site was grazed (c), whereas the relationship with leaf area was dependent only on management strategy (e) and the relationship with specific root length (SRL) was independent of other factors (f). Management and grazing are colour-coded as in the legends. All plots are partial residual plots. Lines represent best fit lines and shaded areas the 95% confidence intervals around those fits.