针阔混交林生物多样性评价指标体系与模型构建

Development of forest biodiversity evaluation index system for conifer and broad leaf mixed forest and model construction

以吉林省长白山系张广才岭阔叶红松林不同演替阶段群落(中龄林、近熟林、成熟林和老龄林)为研究对象,通过调查样地内生物多样性特征,如物种组成信息、空间位置、枯死木和外来入侵物种等情况,结合国内外生物多样性研究现状,初步构建1个3层次结构的针阔混交林生物多样性评价指标体系。选取有代表性的三级评价指标25项,采用主成分分析方法进行指标筛选,最终得到由17项三级指标构成的针阔混交林生物多样性评价指标体系;利用层次分析法结合专家打分法对最终的评价指标进行权重确定,构建出针阔混交林生物多样性评价模型。

The conifer and broad leaf mixed forests at different succession stages of middle-aged forest, nearmature forest, mature forest, and old growth forest in Changbai Mountains, Zhangguangcai ridge of Jilin Province were studied in order to investigate the biodiversity related characteristics such as species composition, spatial relationship, dead wood, invasive species, and so on. Combined with the analytical status on biodiversity evaluation at home and abroad , an initial biodiversity evaluation index system with three levels was constructed for conifer and broad leaf mixed forest and a total of 25 representative 3^rd- level indices were selected. Principal component analysis was then used to screen the indices and the final evaluation index system with 17 evaluation indices of 5ra-level was obtained. The Analytical Hierarchical Process together with export scoring was applied to determine the weights of the evaluation indices and a biodiversity evaluation model for mixed conifer and broad leaf forest was finally constructed, which can provide basis for the evaluation of biodiversity in conifer and broad leaf mixed forest and the determination of related forest biodiversity protection policies.