Root decomposition in grazed and abandoned dry Mediterranean dehesa and mesic mountain grasslands estimated by standard labelled roots

▶ Grazing exclusion or encroachment reduces 13C-root losses in mountain sites. ▶ No differences in root decomposition related to grazing exclusion in Mediterranean site. ▶ No clear effect of grazing exclusion or encroachment on 15N-root losses. ▶ 15N-root derived dynamics seems to be related to soil C:N ratio.