闽北正红菇宿地森林群落主要种群高度生态位

Height Niche of Dominant Populations of Forest Community with Russula vinosa Lindbl in Northern Fujian

基于闽北正红菇宿地森林群落调查数据,以高度级作为不同资源位,计算、分析群落中主要树种的生态位宽度、生态位重叠、生态位相似比例.结果表明:米槠(Castanopsis carlesii)的生态位宽度最大,为群落中的优势种,同时也是建群种,在群落中起主导作用;生态位宽度较大的树种还有青冈栎(Cyclobalanopsis glauca)、少叶黄杞(Engelhardtia fenzelii)、拟赤杨(Alniphyllum fortunei)、木荷(Schima superba),是群落的亚优势种,对正红菇宿地森林群落的结构、功能起着重要作用;生态位重叠值在0.03以上的种对有114对,占总种对数的62.64%,生态位相似比例在0.3以上的种对有65对,占总种对数的71.43%.该森林群落生态位宽度大的树种更容易与其他树种产生生态位重叠,且生态位重叠和生态位相似比例也都较大.

Based on the investigation of the forest community Russula vinosa Lindbl in Jianyang District,niche breadth,niche overlap and niche proportional similarity value of main tree species in forest community were calculated and analyzed with height grade as the resource niche.The results showed that Castanopsis carlesii had largest niche breadth,and it was the dominant and constructive species which played a leading role in the community.Some other subdominant tree species such as Cyclobalanopsis glauca,Engelhardtia fenzelii,Alniphyllum fortunei and Schima superba also had a larger niche breadth,which had significant effects on the structure and function of the forest community.In this community,there were 114 species-pairs with niche overlap value above 0.03,accounting for 62.64%of all species-pairs,and 65 species-pairs with niche proportional similarity above 0.3,accounting for 71.43%of all species-pairs.It could be seen that the tree species with large niche breadth were more likely to have higher niche overlap and niche proportional similarity value.