Data

Long-term coastal ecosystem data show a shift from diatom to diatom-dinoflagellate co-dominance since the 2000s, corresponding to substantial environmental changes including organic-dominated nutrient regimes and elevated dissolved inorganic nitrogen‑to‑phosphorus ratios. In this study, a Nutrient-bi-Phytoplankton-Detritus (NbPD) model integrating physiological and molecular-scale mechanisms was developed and calibrated using four decade-spanning mesocosm experiments (2000s–2020s) to unravel phytoplankton succession dynamics in the Bohai Sea (BS).