Variation Models of Forest Biodiversity in China

Based on the evaluative data of forest biodiversity changes in China from 1973 to 1998, the variation models of not only the pressure index of forest biodiversity but also the forest ecosystem diversity and the forest species diversity as well as the general index of forest biodiversity are computed using SPSS (Statistical Package for the Social Sciences) and are respectively y₁=86.856 3×1.166 8^t,y₂=131.918t-47.119t²-4.938 8t³, y₃=e^{(5.606 7-0.981 4/t)},and y₄=e^{（5.191 6-0.570 2/t）},Furthermore F-values, Sig.F, R², Q-Q plot are analyzed in these models. Then this paper points out that the variation of forest biodiversity can be molded,it possibly shows the direction of variation control of forest biodiversity in China.