Aboveground biomass of native competitor assemblages (A) and total aboveground biomass per pot (B) for different competitor assemblages of different species richness and in the absence or presence of alien and native invaders at each of the three harvests, C proportional aboveground biomass per pot of alien and native invaders in competitor assemblages of different species richness at each of the three harvests. Shown are means (± SEs) of the raw data.