结构-多样性指数在八达岭地区森林健康评价中的应用

森林健康评价已经成为当前林业研究的迫切任务。通过对北京市八达岭林场森林健康实验区的16块固定样地进行研究，首次提出结构-多样性指数（Community Structure-Diversity Index，CSDI）模型，制订了群落结构和物种多样性层面上的森林健康评价等级（CSDI数值）：>15.0（健康）；10.1~15.0（亚健康）；6.1~10.0（不健康）；<6.0（极不健康）。结果表明：16块样地中，健康群落共4个（P10、P11、P12、P16）；亚健康群落共5个（P3、P5、P7、P9、P14）；不健康群落共5个（P6、P8、P13、P15）；极不健康群落共3个（P1、P2、P4）。从实际效果来看，结构-多样性指数具有一定的科学性和可操作性，对北京地区森林健康评价具有参考价值。

Application of Community Structure-Diversity Index(CSDI)in Forest Health Assessment in Beijing Badaling Area

Forest health assessment has been the urgent task of forestry research. Community Structure-Diversity Index Model was first put forward through studies of 16 fixed plots in forest health experimental area, Badaling Forest Center, and forest health rating was drawn up on community structure and species diversity level （CSDI）: >15.0(healthy), 10.1~15.0 (sub-healthy), 6.1~10.0(unhealthy), <6.0 (extremely unhealthy). The results showed that, in the 16 plots, there are: 4 healthy communities（P10, P11, P12 and P16）, 5 sub-healthy communities（P3, P5, P7, P9 and P14）, 5 unhealthy communities(P6, P8, P13 and P15), 3 extremely unhealthy communities(P1, P2 and P4). Based on the practical effect, it can be concluded that Community Structure-Diversity Index is scientific, feasible and it can provide references for Beijing forest health assessment.