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.
Taxus wallichiana var. chinensis （yew） is the main tree populations in Taxus wallichiana var a state-protected species endemic to china. The niches of 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 Ⅱ, 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.
出处
《浙江大学学报（农业与生命科学版）》
CAS
CSCD
北大核心
2006年第5期569-575,共7页
Journal of Zhejiang University:Agriculture and Life Sciences
基金
浙江省生态环境保护专项资金资助项目(浙财建字[2003]17号)
关键词
红豆杉
生态位
生态位宽度
生态位重叠
群落特征
Taxus wallichiana var. chinensis
niche
niche breadth
niche overlap
plant community structure
