Spatial Pattern of Acer tegmentosum in the Mixed Broadleaved-Korean Pine Forest of Xiaoxing'an Mountains, China

摘要

The heterogeneity of forest environment plays an important role in the structure and dynamics of tree population, the composition of forest community, and the maintenance of species diversity. Based upon the research data of the nine hectare permanentplot in the typical mixed broadleaved-Korean pine forest, this study was conducted to analyze the characteristics of spatial pattern of Acer tegmentosum population for seedlings, saplings, and living and dead trees so as to evaluate the effect of micro-topography on spatial pattern of the species. The results noted that A. tegmentosum preferred to gentle slopes. There was no difference in density of seedlings by the variation of aspect, but the density of saplings, and living and dead trees was high onthe western and southeastern slopes. Living trees of A. tegmentosum showed the clumped pattern for all scales within 150 m and highest at the scale of 30m. Dead stems of the species indicated the clumped pattern within Him, highest at the scale of 72 m,and random pattern beyond the scale of Him (P < 0.01). The similarity of occurrence by developmental stages of A. tegmentosum showed that seedlings vs. saplings, saplings vs. living trees, and living trees vs. dead stems had highly positive correlationto each other, respectively (P < 0.01), indicating that the occurrence of previous developmental stages was positively correlated to following stages.