江苏宝华山宝华玉兰种群结构与动态特征分析  

Analyses on population structure and dynamic characteristics of Yulania zenii in Baohua Mountain of Jiangsu Province

作　　者：李乃伟[1] 吴宝成[1] 庄维兵[1] 袁帅 王奇 王涛[1] LI Naiwei;WU Baocheng;ZHUANG Weibing;YUAN Shuai;WANG Qi;WANG Tao(Jiangsu Key Laboratory for the Research and Utilization of Plant Resources,Institute of Botany,Jiangsu Province and Chinese Academy of Sciences(Nanjing Botanical Garden Mem.Sun Yat-Sen),Nanjing 210014,China;Jurong Baohua Mountain National Forest Park Management Committee,Zhenjiang 212415,China)

机构地区：[1]江苏省中国科学院植物研究所(南京中山植物园)江苏省植物资源研究与利用重点实验室,江苏南京210014 [2]句容市宝华山国家森林公园管委会,江苏镇江212415

出　　处：《植物资源与环境学报》2024年第5期98-105,共8页Journal of Plant Resources and Environment

基　　金：江苏省林业科技创新与推广项目(LYKJ[2022]08,LYKJ[2020]24)。

摘　　要：为了揭示极危(CR)植物宝华玉兰〔Yulania zenii(W.C.Cheng)D.L.Fu〕野生种群的结构和动态特征,对江苏省句容市宝华山宝华玉兰野生资源进行全面调查,并运用静态生命表、存活曲线和生存分析等方法综合分析宝华玉兰种群结构和动态变化。结果表明:宝华山全境现存宝华玉兰野生开花植株115株,主要分布于宝华山北坡中部。宝华玉兰种群以中树和大树〔10 cm≤胸径(DBH)<25 cm〕为主,占比达66.1%,属于衰退型种群。从静态生命表看,宝华玉兰种群的生命期望随着径级的增加逐渐下降,种群存活曲线趋向于Deevey-Ⅱ型。生存分析结果显示:宝华玉兰种群趋势具有前期锐减、中期稳定、后期衰退的特点。种群动态量化分析结果表明:宝华玉兰种群动态总体呈增长趋势,但增长极为缓慢。基于上述研究结果,建议采取人工播种、补植实生苗等方式加强对宝华玉兰种群的保护和管理,促进其种群的更新和良性发展。To reveal the structure and dynamic characteristics of the wild population of the critically endangered(CR)plant Yulania zenii(W.C.Cheng)D.L.Fu,a comprehensive investigation on the wild resources of Y.zenii in Baohua Mountain,Jurong City,Jiangsu Province,was conducted,and methods including static life table,survival curve,and survival analysis were employed to comprehensively analyze the structure and dynamic changes of Y.zenii population.The results show that there are currently 115 wild flowering individuals of Y.zenii existing in the entire Baohua Mountain,and they are primarily located on the mid-position of the north slope of Baohua Mountain.The Y.zenii population is dominated by medium and large trees〔10 cm≤diameter at breast height(DBH)<25 cm〕,accounting for 66.1%of the total,indicating a declining type population.In terms of static life table,the life expectancy of the Y.zenii population gradually decreases with the increase of diameter class,and the survival curve of the population tends to be the Deevey-Ⅱtype.The survival analysis result shows that the trend of Y.zenii population exhibits characteristics of a sharp decline in the early stage,stability in the middle stage,and decline in the late stage.The population dynamic quantitative analysis result shows that the population dynamics of Y.zenii show a growth tendency in general,but the growth is extremely slow.Based on the above results,it is recommended to strengthen the protection and management of Y.zenii population by means of artificial sowing,replanting seedlings,etc.,thereby promoting the rejuvenation and sustainable growth of Y.zenii population.

关 键 词：宝华玉兰 种群结构 静态生命表 存活曲线 生存分析 

分 类 号：Q948.15[生物学—植物学] S685.15[农业科学—观赏园艺] S718.542[农业科学—园艺学]