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当前位置: 首页 > 文章 > 濒危植物景东翅子树种群的分布、年龄结构及其动态特征 东北林业大学学报 2011,39 (5) 17-18+35
Position: Home > Articles > Population Distribution,Age Structure and Its Dynamic Feature of Endangered Species Pterospermum kingtungense Journal of Northeast Forestry University 2011,39 (5) 17-18+35

濒危植物景东翅子树种群的分布、年龄结构及其动态特征

作  者：
袁春明;司马永康;耿云芬;郝佳波;毛云玲;魏大坤;何琪金
单  位：
国家林业局云南珍稀濒特森林植物保护和繁育重点实验室;景东彝族自治县林业局
关键词：
景东翅子树;年龄结构;静态生命表;存活曲线;濒危原因
摘  要：
调查研究了景东翅子树种群的分布、年龄结构及其动态特征,并讨论了濒危的原因。野外调查的4个种群中,3个分布于季风常绿阔叶林,1个分布于次生灌丛。在4个种群中共调查到景东翅子树99株(含幼树)。结果表明,景东翅子树属于衰退型种群,其中缺乏幼树和胸径≥20 cm的大树。景东翅子树种群的存活曲线为De-evryⅢ型,生活史中存在二次种群数量明显降低的过程,即从幼树到中等大小的树(胸径<9 cm)阶段和大树胸径从12.0～18.0 cm阶段个体数量降低的现象,其中前者属自然稀疏过程,后者则为人为干扰所致。
译  名：
Population Distribution,Age Structure and Its Dynamic Feature of Endangered Species Pterospermum kingtungense
作  者：
Yuan Chunming,Sima Yongkang,Geng Yunfen,Hao Jiabo,Mao Yunling(Key Laboratory for Conservation of Rare,Endangered and Endemic Forest Plants in Yunnan Province(Yunnan Academy of Forestry),State Forestry Administration,Kunming 650204,P.R.China);Wei Dakun,He Qijin(Forestry Bureau of Jingdong Yi Autonomous County)
关键词：
Pterospermum kingtungense;Age structure;Static life table;Survival curves;Causes of endangerment
摘  要：
A survey was conducted to study the population distribution,age structure and its dynamic features of Pterospermum kingtungense.The causes of endangerment for P.kingtungense were also discussed.Four P.kingtungense populations were surveyed in the field,of which three were distributed in evergreen broad-leaved forests,and one in secondary bushwood.A total of 99 individuals(including saplings) were recorded in the four populations.Results show that the P.kingtungense populations are declining with the lack of seedlings less than 50cm in height(H) and large trees with diameter at breast height(DBH) greater than 20cm.The survival curve for P.kingtungense populations belongs to Deevry Ⅲ,which is characterized by two obvious decreasing process in life history from saplings(DBH<3cm,H>50cm) to intermediate trees(DBH<9cm),and from DBH of 12cm to 18cm of large trees.The former was in the process of natural thinning,and the latter was caused by human disturbances.

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