文献类型：期刊文献

中文题名：珍稀濒危植物猪血木野生种群的径级结构与动态变化

英文题名：Wild Population Structure and Dynamics of the Rare and Endangered Plant Euryodendron excelsum

作者：袁在翔[1] 李盈莹[1] 邱祖械[2] 吴伟煌[1] 李荣生[1] 余纽[1] 杨锦昌[1]

第一作者：袁在翔

机构：[1]中国林业科学研究院热带林业研究所,广东广州510520;[2]阳春市林业科学研究所,广东阳春529699

年份：2025

卷号：40

期号：5

起止页码：215-224

中文期刊名：西北林学院学报

外文期刊名：Journal of Northwest Forestry University

收录：;北大核心:【北大核心2023】；

基金：广东省林业局林木种质资源调查项目(粤林函〔2022〕87号);广东省林业局猪血木极小种群资源拯救项目(粤林函[2022]250号)。

语种：中文

中文关键词：猪血木;濒危物种;种群结构;种群动态;静态生命表

外文关键词：Euryodendron excelsum;endangered species;population structure;population dynamics;static life table

分类号：S718.54;S792.99

摘要：明晰珍稀濒危植物猪血木(Euryodendron excelsum)野生种群的动态变化,有助于了解该物种的就地保护成效。基于广东省阳春市八甲镇和三甲镇猪血木野生种群2022-2023年的每木检尺数据和相关文献数据,利用种群结构动态指数、静态生命表、存活曲线、生存分析函数等方法,对比分析该种群在2004—2006、2018-2019、2022-2023年的径级结构特征和种群变化动态。结果表明:1)2004-2023年,八甲镇猪血木野生种群的个体数量持续下降,幼苗与天然更新比例不断降低,径级结构由金字塔形逐渐趋于锥形,表明该种群处于衰退状态,但能维持其结构稳定;2)2018-2023年,三甲镇猪血木野生种群处于增长状态,个体数量增加了70.5%,但株高低于1 m的幼苗数量显著减少,达75.0%,种群径级结构同样由金字塔形逐渐趋于锥形;3)各时期2个种群存活曲线主要趋于Deevey-Ⅲ型,其中幼苗向幼树转化过程中存在瓶颈;4)以往的就地保护政策对猪血木成株的保护效果较好,但种群天然更新收效甚微。因此,现阶段应对面积大、母树多的猪血木生境斑块进行重点保护,采取适当割灌除草等措施,促进天然更新与幼苗生长,进而恢复该种群的个体数量。
The study aimed to evaluate the population dynamic changes of the rare and endangered plant Euryodendron excelsum,which could help to clarify the effectiveness of in situ conservation of the wild population.The diameter structures and dynamic changes of E.excelsum population during the periods of 2004-2006,2018-2019,and 2022-2023 were analyzed using the methods of dynamic index,static life table,depicted survival and function curves,based on the data of E.excelsum population collected from Yangchun city Guangdong province during 2022-2023 and the other data from related literatures.The results showed that:1)The individuals,seedlings and natural renewal of the E.excelsum population significantly decreased in Bajia town from 2004 to 2023,causing that a“pyramid”shape of the population structure tended to a cone shape.It indicated that E.excelsum population in Bajia town was in a declining state from 2004 to 2023,but the population structure was relatively stable in each period.2)The individual number of E.excelsum population in Sanjia town increased 70.5%from 2018 to 2023,but the seedlings with height below 1 m decreased 75.0%.The population structure also tends from a pyramid shape to a cone shape.3)The survival curve of the two wild population in each period mainly inclined to the Deevey-Ⅲtype,indicating that the seedling was difficult to grow into young tree.4)The previous strategies of on-site conservation were beneficial to protect the adult plant and unsuited to natural renewal of the E.excelsum population.Therefore,the large patches with many mother trees should be strengthened protection.Moreover,the benign interference measures such as proper removal of grass or shrub should be implemented to promote natural regeneration and seedling growth of the E.excelsum population.