Fig. 6

Carbon stock of coarse woody debris CWD (a), fine woody debris FWD (b) and non-woody debris NWD (c) in six plant communities among different stages of succession in a subalpine forest in Wanglang National Nature Reserve on eastern Qinghai-Tibet Plateau. Figure d indicates the coefficients of variation (CV) of carbon stock of plant debris, CWD, FWD and NWD at different succession ages. Different lowercase letters mean significant difference among different succession stages or different plant debris components (P < 0.05). Horizontal bars indicate standard errors of means (n = 3)