凤阳山保护区木荷种群生态位研究

Studies on the niche of Schima superba Gardn in Fengyangshan Nature Reserve

通过对凤阳山自然保护区进行群落调查,选取核心区不同海拔的30个木荷种群样地18个优势树种作为研究对象,以各物种重要值为数量指标,采用Shannow-Wiener指数计测公式对该地木荷种群进行生态位宽度、重叠值和相似比进行了分析。结果表明:木荷的生态位宽度列第1位(1.46),其优势地位远强于其他物种;木荷种群与其他种群的生态位重叠值在0.6～0.8之间,重叠程度适中,因此木荷种群对各资源位的需求差异不明显;生态位相似比与生态位重叠值大小趋势一致;木荷种群与褐叶青冈、交让木等种群共优组成当地典型群落类型。此次对木荷种群生态特性的研究可为该地区的生物多样性保护、植被恢复的物种选择提供理论依据。

By using the important value as the quantity index,Shannow-Wiener index was used to determine the niche breadth,the proportion of niche overlap and the niche similarity of 30 different elevation and location plots of Schima superba Gardn forest and 18 dominant species in Fengyangshan Nature Reserve.The results showed： the niche breadth of Schima superba Gardn came the first place（1.46）,its advantageous position was far stronger than other species;the proportions of niche overlap of Schima superba Gardn were from 0.6 to 0.8,the degree of overlap is moderate,so the requirements of each resource position were not obvious;the trend of the proportion of niche overlap and the niche similarity are the same;the local typical community type consist of Schima superba Gardn,Cyclobalanopsis stewardiana and Macropodous tigernanmu.Our research served as a theoretical reference for the biodiversity conservation and restoring degraded vegetation in the region.