Contribution of galaxies of mass M_* to the SFR density evaluated for different metallicity thresholds at z = 0. The x axis represents the galaxy stellar mass M_*, while the lines show the total contribution to the SFR density from all galaxies in a given stellar mass bin, with a metallicity Z ≤ Z_th. The different line styles refer to different metallicity thresholds Z_th; solid lines: Z_th = 1/3 Z_⊙, dashed: Z_th = 1/10 Z_⊙, and dotted: Z_th = 1/100 Z_⊙. The different colors represent models with different SFR–M_* relations, blue: B18, violet: S14, pink: P23, orange: SHALLOW, yellow: STEEP. Each panel shows the results for a different FMR, from left to right: Mannucci et al. (2011), Andrews & Martini (2013), Curti et al. (2020).