不同健康保育措施下千岛湖区森林群落结构及其物种多样性

Forest Community Structure and Species Diversity Changes by Different Management Measures in Qiandaohu

针对千岛湖区的植被现状,实施了阔叶化改造等森林健康保育措施,通过对杉木纯林、马尾松纯林和不同健康保育措施下杉木林、马尾松林的样地调查,计算各物种重要值、物种多样性指数、群落均匀度指数、生态优势度指数,研究结果表明,杉木纯林和马尾松纯林经阔叶化改造后,杉木和马尾松的重要值明显下降,乔木层物种多样性指数高于纯林,有利于维持森林生态系统向复杂化、多样化发展。杉木纯林和马尾松纯林经阔叶化改造后,群落均匀度指数增大,群落生态优势度指数减小,群落稳定性增强。

Experiment was executed on different management measures for pure Cunninghamia lanceolata and Pinus massoniana forest in Qiandaohu, Zhejiang province. Investigation on weigh value of each species, diversity index, evenness index, ecological dominant index of sample plots demonstrated that transformation of pure C. lanceolata and P. massoniana forest to broad leaf forest decreased weigh value ofC. lanceolata and P. massoniana, while species diversity index of arbor layer was higher than that of pure forest, which was advantageous in complexity and diversity of the forest. Transformation of pure C. lanceolata and P. massoniana forest to broad leaf forest could also increase community evenness index, decrease ecological dominant index, enhance community stability.