濒危药用植物短柄乌头空间分布格局的研究

A Study on the Spatial Distribution Pattern of Aconitum brachypodum Populations

目的:短柄乌头(Aconitum brachypodum Diels)为毛茛科乌头属中国特有珍稀濒危植物,该物种现仅在云南、四川有分布,且数量稀少,为保护濒临灭绝的短柄乌头而进行该文的研究。方法:通过样方法及民间访谈对短柄乌头种群现状进行了调查,用方差/均值比、丛生指标(I)、负二项参数(K)、Cassie指标(Ca)、平均拥挤指标(m*)和聚块性指标(m*/m)对其分布格局进行了研究。结果:初步研究结果显示,短柄乌头10种群分布格局类型为集群分布,且聚集强度各不相同,所研究的3种群聚集尺度多为8m2。结论:整个种群分化格局的演化趋向于高聚集强度的集群分布。

Objective：Aconitum brachypodum is an endangered species from the family Ranunculaceae,which only distributes in Yunnan and Sichuan Province.Previous reports showed that there were only few mdividuals still surviving,So it was dcfmed as a critically endangered species by IUCN.Methods：Wild investigations and plot analysis were carried to test the status of populations,and using methods such as v/m ratio,negative binomial parameter（K）,index of dispersion（I）,Cassie index（Ca）,index of clumping（m＊） and index of patchiness（m＊/m） to analyze the space distribution pattem of different A.brachypodum populations.Results：The result indicated that the distribution patterns of A.brachypodum populations were clumped.In the three researched populations,the pattern scale is about eight square meters.Conclusion：The evolutionary of A.brachypodum populations are becoming higher in assemble intensity.