Across levels of diversity, from (a) a single clone, (b) 4 clones and (c) 24 clones, there was no effect of pre-adaptation history of the focal species with (grey) or without (black) the community on subsequent community structure. Large points represent centroids of treatments and small points individual microcosms. Lines connect individual microcosms to treatment centroids. The centroids and microcosms of the LacZ ancestor (red) are plotted across panels to help visualise the overall effect of diversity.