Upper panel: IMF weighted ejected mass for metal-free stars with initial masses in the range [1:100] M_⊙. Ejected mass are given for six main ISM-elements as in Fig. 1. The total ejected mass (black) and the metal ejected mass (dark grey) are also given. Campbell & Lattanzio (2008) model is plotted with pentagons, Gil-Pons et al. (2013) model with triangles and Heger & Woosley (2010) model with circles. Lower panel: time evolution of the ejecta rate for a metal-free SSP of 1 M_⊙. The specific contribution of the SNIa process to the ISM enrichment is plotted with dashed-line.