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A full appreciation of the role played by gas metallicity (Z), star-formationrate (SFR), and stellar mass is fundamental to understanding how galaxies formand evolve. The connections between these three parameters at differentredshifts significantly affect galaxy evolution, and thus provide importantconstraints for galaxy evolution models. Using data from the Sloan Digital SkySurvey-Data Release 7 (SDSS-DR7) and the Galaxy and Mass Assembly (GAMA)surveys we study the relationships and dependencies between SFR, Z, and stellarmass, as well as the Fundamental Plane for star-forming galaxies. We combineboth surveys using volume-limited samples up to a redshift of z ~ 0.36. TheGAMA and SDSS surveys complement each other when analyzing the relationshipsbetween SFR, Mass and Z. We present evidence for SFR and metallicity evolutionto z ~ 0.2. We study the dependencies between SFR, Mass, Z, and specificstar-formation rate (SSFR) on the M-Z, M-SFR, M-SSFR, Z-SFR, and Z-SSFRrelations, finding strong correlations between all. Based on thosedependencies, we propose a simple model that allows us to explain the differentbehaviour observed between low and high mass galaxies. Finally, our analysisallows us to confirm the existence of a Fundamental Plane, for which Mass=f(Z,SFR) in star-forming galaxies.

Galaxy And Mass Assembly (GAMA): A deeper view of the mass, metallicity, and SFR relationships