Fig. 2
Plant colonization effects on plant cover and plant biomass. Number of colonizing plant species after a 2 years and b 5 years. c Plant cover [%] after 2 years and d plant biomass [g m−2] after 5 years. In c and d dashed lines and open circles display plant cover and biomass with resident plant species of weeded subplots, respectively, and solid lines and circles display plant cover and biomass with resident plant species plus colonizing plant species of non-weeded subplots, respectively. *** P < 0.001, ** P < 0.01, * P < 0.05, (*) P < 0.1, ns P > 0.1