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画稿溪国家级自然保护区珍稀植物桫椤种群结构与更新
鞠文彬 ; 高信芬 ; 包维楷
刊名植物科学学报
2014
卷号32期号:2页码:113-121
关键词桫椤 种群更新 静态生命表 生存分析 画稿溪国家级自然保护区
其他题名Population Structure and Regeneration of the Endangered Tree FernAlsophila spinulosa in Huagaoxi National Nature Reserveꎬ Southwestern China
通讯作者高信芬
产权排序1
合作状况其它
中文摘要根据四川画稿溪国家级自然保护区桫椤(Alsophila spinulosa)种群分布特点,设立4个样地1个样带共44个样方(20 m×20 m),从种群密度、生命表和生境关联(草本层郁闭度和林分受干扰强度)等方面研究了保护区桫椤种群的结构特征。结果表明,每个桫椤种群样方的平均密度为0.088株/m2,幼苗密度为0.049株/m2;桫椤种群的死亡率和消失率曲线变化基本一致,发育过程中出现3个死亡高峰值,分别在第1龄级(H
英文摘要Population structure and regeneration of the endangered tree fern Alsophila spinulosa in Huagaoxi National Nature Reserve were examined by life tableꎬ survival analysis and habitat (ground cover and disturbance intensity) associations We established 44 plots (20 m × 20 m)ꎬ recorded the height (H) of each tree within each plot and grouped them into ten age class: 1ꎬ H < 0 01 mꎻ 2ꎬ 0 01 m ≤ H < 0 60 mꎻ 3ꎬ 0 60 m ≤ H < 1 20 mꎻ 4ꎬ 1 20 m ≤ H < 2 10 mꎻ 5ꎬ 2 10 m ≤ H < 3 00 mꎬ and so on Results revealed that the mean density of the A spinulosa plots was 0 088 plants/ m2ꎬ with a seedling density (class 1) of 0 049 plants / m2 . There were three peaks in mortality occurring in the firstꎬ seventh and tenth age classesꎬ successively After the seventh size classꎬ the survival rate declined to less than 1%. Four survival function curves showed that A spinulosa was characterized by sharp shrinkage in the early agesꎬ stationarity in the intermediate ages and decline in the late ages Stem density of A spinulosa was not correlated with ground cover for any size class (p ≥ 0 18)ꎬ while densities of all non ̄seedling individuals and the seventh size class showed a negative correlation with disturbance intensity (p < 0 05) The results suggested that the A spinulosa population had the capacity for natural regenerationꎬ but human interference might limit its population density.
学科主题生态研究
收录类别CSCD
语种中文
CSCD记录号CSCD:5131907
内容类型期刊论文
源URL[http://210.75.237.14/handle/351003/26565]  
专题成都生物研究所_生态研究
推荐引用方式
GB/T 7714
鞠文彬,高信芬,包维楷. 画稿溪国家级自然保护区珍稀植物桫椤种群结构与更新[J]. 植物科学学报,2014,32(2):113-121.
APA 鞠文彬,高信芬,&包维楷.(2014).画稿溪国家级自然保护区珍稀植物桫椤种群结构与更新.植物科学学报,32(2),113-121.
MLA 鞠文彬,et al."画稿溪国家级自然保护区珍稀植物桫椤种群结构与更新".植物科学学报 32.2(2014):113-121.
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