| 唐家河自然保护区连香树种群结构与数量动态 |
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| 引用本文： | 毛维莉,马永红,甘小洪.唐家河自然保护区连香树种群结构与数量动态[J].四川林业科技,2019(2):69-74. |
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| 作者姓名： | 毛维莉 马永红 甘小洪 |
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| 作者单位： | 西华师范大学西南野生动植物资源保护教育部重点实验室;西华师范大学西南山地特色植物种质适应与利用研究所 |
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| 摘 要： | 以种群静态生命表及生存分析理论为基础,以林木径级结构代表年龄结构,利用生存函数分析等方法,对唐家河自然保护区连香树种群的结构及数量动态特征进行了研究。结果表明:(1)研究区域内连香树种群结构基本呈金字塔型,其种群内幼苗较少,中老龄个体较多;(2)种群死亡率和消失率曲线变化趋势基本一致,在第Ⅱ龄级出现峰值,即幼苗死亡率较高;种群存活曲线趋于Deevey-Ⅱ型;(3) 4个生存函数曲线表明,连香树种群具有前期锐减、中后期相对稳定和末期逐渐衰退的特点,目前种群已处于衰退的早期。
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| 关 键 词： | 连香树 种群结构 静态生命表 存活曲线 濒危因素 |
Population Structure and Dynamic Changes of Cercidiphyllum japonicum in Tangjiahe Nature Reserve |
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| MAO Wei-li,MA Yong-hong,GAN Xiao-hong.Population Structure and Dynamic Changes of Cercidiphyllum japonicum in Tangjiahe Nature Reserve[J].Journal of Sichuan Forestry Science and Technology,2019(2):69-74. |
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| Authors: | MAO Wei-li MA Yong-hong GAN Xiao-hong |
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| Institution: | (Key Laboratory of Southwest China Wildlife Resources Conservation, Ministry of Education, West Normal University, Nanchong 637009, China;Institute of Plant Adaptation and Utilization in Southwest Mountain, West Normal University, Nanchong 637009, China) |
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| Abstract: | Based on the static life table of population and the theory of survival analysis, studies were made of the structure and quantitative dynamic characteristics of Cercidiphyllum japonicum populations by using the method of survival function analysis in Tangjiahe Nature Reserve. The results showed that(1) the age structures of C. japonicum populations were like a pyramidal shape, and the number of younger individuals was relative less, while that of mid and older individuals was relative greater;(2) There was a similar variation trend in population mortality and vanishing rate curve, and the peak value appeared in the second age-class, which indicated the seedling mortality was higher, and the survival curve of population tended to be Deevey-type II.(3) The population size of these populations would decrease sharply in the early stage, become relatively stable in the middle and late stages, and gradually decline in the last stage. The populations were in the early stage of decline at present. |
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| Keywords: | Cercidiphyllum japonicum Population Static life table Survival curve Endangered factors |
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