【摘要】 红豆杉为我国特有的国家一级保护植物.通过Shannon-wiener生态位计测公式和对称α法(Pianka公式)对凤阳山红豆杉群落的样方调查数据进行分析,研究了凤阳山红豆杉所在群落主要种群的种间关系及其群落特征.结果表明:凤阳山红豆杉群落大致可分成两个群落类型:福建柏-猴头杜鹃林(群落Ⅰ)和褐叶青冈-木荷-甜槠林(群落Ⅱ),其中群落Ⅰ较适合红豆杉生长与更新;红豆杉在群落Ⅰ和群落Ⅱ中的生态位宽度值分别为0.248、0.337.在所属群落类型中分别排在第10位与第7位,其在群落Ⅱ中对资源的利用率较高;红豆杉在群落Ⅱ与其它物种的生态位重叠值大于群落Ⅰ,说明红豆杉在群落Ⅱ中的潜在竞争较大.推测当资源不足时,红豆杉在群落Ⅱ中极易与其它物种发生资源竞争.总体观之,在凤阳山自然保护区内红豆杉的保护应以生境保护和培育为主,建议将群落类型Ⅰ作为重点保护类型.更多还原

【Abstract】 Taxus wallichiana var.chinensis(yew) is a state-protected species endemic to china.The niches of the main tree populations in Taxus wallichiana var.chinensis in Fengyangshan mountain were investigated using Shannon-Winner coefficient and Pianka coefficient methods.The results showed as the following:(i) The yew communities could be divided into two types,namely Fokienia hodginsii-Rhododendron simiarum community(Type Ⅰ),and Castanopsis eyrei-Cyclobalanopsis stewardiana-Schima superba community(Type Ⅱ).(ii) Type Ⅰ is more suitable for the growth of yew than type Ⅱ.(iii) Yew occupied a larger niche breadth in type Ⅱ than type Ⅰ,0.337 in type Ⅱ and 0.248 in type Ⅰ,respectively,which showed yew making a better use of resource in type Ⅱ.But it might also suffer from a more serious competition simultaneously under a resource limitation for the niche overlapping of yew and the other species are larger in type Ⅱ than type Ⅰ.Protecting both yew and its living condition,especially for type Ⅰ,which was regarded as conservation measure,is proposed as well.更多还原