安徽琅琊山青檀种群结构与空间分布格局研究

通过设置500m2样方8个,应用“相邻格子法”获取野外资料,采用空间序列代替时间的方法与6种聚集度指标,对安徽琅琊山青檀的种群结构与空间分布格局进行了研究.结果表明:(1)各样地的青檀种群结构大致可分为增长型、稳定型和衰退型3种类型；(2)不同样地青檀种群分布格局主要为集群分布;(3)不同发育阶段种群分布格局有所差异,...

Population structure and spatial distribution pattern of Pteroceltis tatarinowii in Langyashan Mountain of Anhui Province

Population structure and spatial distribution pattern of Pteroceltis tatarinowii in Langyashan Mountain of Anhui Province were studied in this paper.8 plots of 500 m2 were respectively established.Sample data obtained in contiguous grid quadrate,substituted spatial series for time series and six aggregate indexes were used in this study.The results showed:(1)Population structure of P.tatarinowii in 8 plots presented growing,stable or senescent type;(2)Population distributions were mostly clumped;(3)At different developmental stages,distribution pattern presented a trend from clump to random and aggregation intensity decreased somewhat;(4)Size of blocks affected the spatial distribution pattern and the pattern scales of 8 plots were about 16 m2 and 32 m2.It proved that the spatial distribution pattern of P.tatarinowii populations were closely related to its biological and ecological characteristics,community composition,environmental factors and human disturbance.