海南东寨港红海榄种群结构与数量动态变化特征  

Population structure and dynamics of Rhizophora stylosa in Dongzhaigang National Mangrove Reserve,Hainan

作　　者：吕晓波 钟才荣 张孟文 方赞山 程成 陈旭 李东海[2] 李剑碧 LYU Xiaobo;ZHONG Cairong;ZHANG Mengwen;FANG Zanshan;CHENG Cheng;CHEN Xu;LI Donghai;LI Jianbi(Hainan Academy of Forestry/Hainan Academy of Mangroves,Haikou,Hainan 571100,China;College of Ecology and Environment,Hainan University,Haikou,Hainan 570228,China)

机构地区：[1]海南省林业科学研究院/海南省红树林研究院,海口571100 [2]海南大学生态与环境学院,海口570228

出　　处：《热带生物学报》2023年第5期490-498,共9页Journal of Tropical Biology

基　　金：海南省林业科学研究院(海南省红树林研究院)基础性科研工作(KYYS-2021-04)。

摘　　要：为了解东寨港国家级红树林保护区内红海榄(Rhizophora stylosa)种群的动态变化,以保护区内建设的1 hm2的固定样地中的红海榄种群作为研究对象,对其种群的结构与数量动态变化特征进行分析。结果表明:(1)此区域的红海榄种群径级结构为不规则的金字塔型,Ⅰ~Ⅲ龄级的个体数量之和占种群个体总数的48.84%,Ⅳ龄级后植株个体数量降低趋势明显。(2)数量动态变化指数反映出该区域的红海榄种群为增长型的种群,但种群较为不稳定,外界干扰下种群数量增长趋势不显著。(3)红海榄种群的存活曲线属于Deevey-Ⅲ类型。(4)红海榄种群的静态生命表、死亡率曲线、消失率曲线以及生存分析反映出该区域的红海榄种群的在低龄级的阶段种群的动态变化相对较为剧烈,发展到高龄级阶段种群的动态变化相对平稳。(5)红海榄种群数量的时间序列分析也反映出,红海榄种群当前虽然低龄级的个体数量较多,但未来几个龄级时间后,能发育到较高龄级的个体相对较少,未来的种群将以中高龄级的个体为主体。东寨港国家级红树林保护区的红海榄种群为增长型种群,但其种群对外界干扰较为敏感,低龄级阶段种群动态变化较为激烈,中、高龄级阶相对较为平稳。因此,应加强对其种群的长期监测以及灾害的防治,尤其要加强对低龄级阶段个体的保护和人工辅助修复。It is of great practical significance to carry out relevant research on mangrove plant population to understand the population structure and dynamics of mangroves at the present stage for improving mangrove conservation and ecological restoration.A survey of Rhizophora stylosa population in permanent sample plots covering 1 hm2 in Dongzhaigan National Mangrove Reserve,Haikou,Hainan Province was made to analyze the population structure and dynamics of R.stylosa.The analysis showed that the stem diameter structure of the R.stylosa population in these plots was of irregular pyramid type,with the total number of individuals in age class Ⅰ to Ⅲ accounting for 48.84%of the total number of individuals in the population,and the number of individuals in age classⅣbeing significantly low.The population dynamic change index suggested that the R.stylosa population in this mangrove reserve is expanding,but not stable,and not significantly under external disturbance.The population had a Deevey type II survivorship curve.The static life table,mortality curve,disappearance rate curve and survivorship analysis of the R.stylosa population showed that the population dynamics in this mangrove reserve was relatively drastic at the younger stage,and relatively stable when the population developed into the older stage.The time series analysis of the R.stylosa population reveals that although there are more individuals at the lower age level in the current population,relatively few individuals will develop into the older age level after several age levels in the future,and that the future population will consist of individuals mainly at the middle and older age levels.The population of R.stylosa in Dongzhaigang National Mangrove Reserve is expanding,but is sensitive to external disturbance.The dynamic changes of the population are more intense in the lower age stage,and relatively stable in the middle and old stages.Therefore,the long-term monitoring and disaster prevention of the population should be strengthened,especially the p

关 键 词：红树林 红海榄 种群结构 种群动态变化 

分 类 号：S718.5[农业科学—林学]