Non-additive effect of species diversity and temperature sensitivity of mixed litter decomposition in the alpine meadow on Tibetan Plateau

► We studied the effect of litter diversity on temperature sensitivity of decomposition rate. ► High temperature reduced dependency of mixed litter mass loss on species richness. ► High temperature reduced dependency of non-additive effects on species richness. ► The effect of species composition on mixed litter mass loss varied with species richness.