Abstract Sixty year ago, Charles Elton posed that species‐rich communities should be more
resistant to biological invasion. Still, little is known about which processes could drive the
diversity–invasibility relationship. Here we examined whether soil‐microbe‐mediated
apparent competition on alien invaders is more negative when the soil originates from
multiple native species. We trained soils with five individually grown native species and
used amplicon sequencing to analyze the resulting bacterial and fungal soil communities …