Fig. 4. Differences in total grass cover per plot, expressed as the sum of covers of all grass species recorded, between habitats (A) and bedrocks (B). Transparent points represent grass cover for each habitat (n=20) or bedrock (n=30), solid points (only for perennial rivers) represent outliers. Significance P: . (0.1–0.05), * (0.05–0.01), ** (0.01–0.001), *** (< 0.001), non-significant values are not shown.