BPT diagram for GAMA galaxies. Galaxies below the Kauffmann et al. (2003) function correspond to SF galaxies (blue points), while the galaxies above the Kewley et al. (2001) function correspond to AGN galaxies (red points). Galaxies that fall between the Kewley et al. (2001) and Kauffmann et al. (2003) functions are classified as composite galaxies (green points). The error cross corresponds to the median errors of the axes calculated using Monte Carlo propagation.