鼎湖山旅游路径对针阔混交林个体数量和生物量空间分布格局的影响

Effects of Road on Spatial Distribution Patterns of Stand and Biomass of Pine and Broad-leaved Mixed Forest in Dinghushan Nature Reserve

以与旅游路径相邻的鼎湖山针阔混交林样地为研究对象,应用垂直路径和平行路径两种样带取样方法,探讨旅游路径影响下不同取样尺度群落个体数量和生物量的空间分布格局,以及不同优势种群空间分布格局对旅游路径干扰的响应。结果表明,群落生物量在各取样尺度上均未检测到显著变化(P>0.05),群落个体数在远离旅游路径方向各取样尺度上均呈显著的增加趋势(P<0.05)。优势物种20m取样尺度的空间分布格局反映了不同种群对旅游路径干扰的不同响应,其中荷木的生物量、豺皮樟的个体数和生物量在远离旅游路径方向上均呈显著增长趋势,其他物种的个体数和生物量变化不显著。

The spatial distribution patterns of community biomass and number of individuals, and the distribution pattern of dominant populations responsed to road under different sampling scales were studied in pine and broad-leaved mixed forest along the road in Dinghushan Nature Reserve, Guangdong Province. Sample plots were arranged along transects vertical or parallel to road. The results showed that there were no significant difference in community biomass among the sampling scales along parallel direction of road （P 〉 0.05）, while significant increase in number of individuals among sampling scale were detected （P 〈 0.05）. On the sampling scale of 20 m, the road effects on different dominant populations were demonstrated in their spatial distribution patterns. There were significant increases in the biomass of Schirna superba population, the number of individuals and biomass of Litsea rotundifolia population （P〈0.05） along the parallel direction to road, respectively, while those of other populations had no significant difference.