Fig. 3 Density Dependent mechanisms. Changes in the mean competitive interactions (Δαs) of each species group in each global change treatment versus control. Intraspecific (Intra) shows the mean change in competition of a species group on itself (i.e. self-limitation). Interspecific (Inter) shows the sum of the mean changes of all other species groups on that group. Net is the combination of intra and interspecific changes within each treatment and species group. Values to the left, right of the dotted zero line signify that that competition on a species group became stronger, weaker in global change vs control conditions respectively. Raw pairwise α and Δαvalues shown in Tables S2, S3, and Fig S8 (a-d).