TY - JOUR TI - Multistability and regime shifts in microbial communities explained by competition for essential nutrients AU - Dubinkina, Veronika AU - Fridman, Yulia AU - Pandey, Parth Pratim AU - Maslov, Sergei A2 - Shou, Wenying A2 - Baldwin, Ian T A2 - Shou, Wenying VL - 8 PY - 2019 DA - 2019/11/22 SP - e49720 C1 - eLife 2019;8:e49720 DO - 10.7554/eLife.49720 UR - https://doi.org/10.7554/eLife.49720 AB - Microbial communities routinely have several possible species compositions or community states observed for the same environmental parameters. Changes in these parameters can trigger abrupt and persistent transitions (regime shifts) between such community states. Yet little is known about the main determinants and mechanisms of multistability in microbial communities. Here, we introduce and study a consumer-resource model in which microbes compete for two types of essential nutrients each represented by multiple different metabolites. We adapt game-theoretical methods of the stable matching problem to identify all possible species compositions of such microbial communities. We then classify them by their resilience against three types of perturbations: fluctuations in nutrient supply, invasions by new species, and small changes of abundances of existing ones. We observe multistability and explore an intricate network of regime shifts between stable states in our model. Our results suggest that multistability requires microbial species to have different stoichiometries of essential nutrients. We also find that a balanced nutrient supply promotes multistability and species diversity, yet make individual community states less stable. KW - alternative stable states KW - consumer resource models KW - competitive exclusion KW - population dynamics KW - limiting nutrients KW - microbial ecoclogy JF - eLife SN - 2050-084X PB - eLife Sciences Publications, Ltd ER -