Before revision:  The large variation seen in this simple model suggests that real ecosystems may not obey a single universal relationship between nutrient supply and diversity  .
After revision:  The large variation seen in this simple model suggests that real ecosystems may not obey a single universal relationship between nutrient supply and diversity . To connect to real microbial communities, we validate our model framework against previously published Escherichia coli batch and chemostat experiments and outline potential future experiments to test the model's multispecies predictions .