为了探究物种整体和不同生长阶段的空间分布格局，并研究种群分布格局与生境空间异质性的关系，以小秦岭自然保护区2个1 hm2样地调查数据为基础，采用点格局分析法对群落在完全空间随机以及异质性泊松分布下的空间分布格局进行对比研究，结果表明：两样地物种均受到生境异质性的显著影响，两个样地内的生境适合物种的生长，而且物种受到生境异质性的影响主要表现在大尺度上；此外，成年树与小树的空间格局相似，但小树更容易受到生境异质性的影响。结果较好地反映了小秦岭物种的空间分布格局，并为更好的保护和利用小秦岭自然保护区内的植物资源提供科学依据。%To explore the spatial distribution pattern of species and of different growth stages,and to study the influence of habitat heterogeneity on spatial distribution pattern,based on the foundamental data of two 1 hm2 plots in Xiaoqinling nature reserve,Henan,we used the point pattern analysis to compare the difference of spatial distribution pattern between under complete spatial randomness and under heterogeneous Poisson process. Results showed as follows. In both plots,the species are significantly affected by the habitat heterogeneity,the habitat in these two plots are suitable for plants to growth,and the influence of habitat heterogeneity on species are mainly showed at large scales. Moreover,the spatial patterns of adult and sapling are similar,but the saplings are more easily affected by habitat heterogeneity. In this paper,the results reflect the spatial distribution patterns of species in Xiaoqinling nature reserve,and provide a scientific basis to better protect and use the plant resources in Xiaoqinling nature reserve.
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