Average Hα (first panel, blue line) and [O III] + Hβ (second panel, blue line) line luminosities versus the SFR for GAEA-LC galaxies with specific SFR > 10^−10.5 yr⁻¹ in the redshift range 0–0.3, alongside the one standard deviation scatter (shaded area). Overplotted, for comparison, are widely used relations from Kennicutt & Evans (2012, for Hα, dashed line) and Osterbrock & Ferland (2006, for [O III] + Hβ, dotted line). The bottom panel shows the average [O III] line luminosity versus AGN luminosity for active GAEA-LC galaxies with a 1σ scatter (green line and shaded area), plotted alongside the relation found by Lamastra et al. (2009, dash-dotted line) from a sample of 61 type-2 AGNs with z < 0.83.