Fig. 6

The trend of China’s FCS in the past 40 years. Solid dots denote the national FCSs, which are estimated using measured WDs ranging from 0.454 to 0476 (t∙m^− 3) on average for the country; error bars indicate the biases when WDs change +/− 5%. The solid curve gives maximum values of FCS by setting up WDs to be 0.7 (t∙m^− 3) as all species are assumed as rosewood. Because this curve indicates unrealistic values, it can be used to test whether an estimate is proper. Details of the curves and dots correspond to values listed in Table 2. Note, 1) both 20% and 80% in this example are calculated by comparing the measurements with the 45° line; 2) The prediction in 2050 is only for timber forests