This is a preprint journal club review of "Exotic species dominate due to niche overlap in a complex grassland community" by Lawrence H. Uricchio, S. Caroline Daws, Erin R. Spear and Erin A. Mordecai. Te preprint was originally posted on bioRxiv on January 15, 2018 (DOI: https://doi.org/10.1101/253518) https://www.biorxiv.org/content/early/2018/01/24/253518. Our group Biotic Interactions and Global Change (BIGC) reviewed this paper in February 2018.