旅游干扰对典型喀斯特森林植物多样性的影响

以旅游开发时间和年游客量为旅游干扰强度设置标准,选择干扰强度大的荔波小七孔风景名胜区和干扰强度小的茂兰国家级自然保护区以及无干扰的原始森林3种群落,调查植被的种类、数量,分析计算多样性指标.结果表明,在较强旅游干扰下,乔木层和灌木层的丰富度指数、均匀度指数、多样性指数均降低,草本植物层的丰富度指数增加,均匀度指数降低；一般旅游干扰下,乔木层的丰富度指数、Shannon-Wiener指数均降低而Simpson指数和均匀度指数均增加,灌木层的丰富度指数增加,均匀度指数、多样性指数均降低,草本植物层的多样性各指数均增加.

Effects of Tourism Disturbance on the Plant Diversity of Typical Karst Forest

According to the time of tourism development and annual tourist capacity,3 communities in Libo Xiaoqikong scenery zone,Maolan nature reserve and original forest standing for strong,slight and no disturbance respectively was selected to study the effects of tourism disturbance on the plant diversity of typical karst forest.The kind and amount of vegetation was investigated to obtain the diversity indices.The results showed that the richness,evenness and diversity index of arbor and shrub layer was decreased under strong tourism disturbance;however,of herb layer,the richness index was increased while the evenness index was decreased.Under slight tourism disturbance,the richness index and Shannon-Wiener index of arbor layer,evenness and diversity index of shrub layer was decreased;the Simpson index and evenness index of arbor layer,richness index of shrub layer,all the diversity indices of herb layer was increased.