黔东南皂角种群结构和数量动态特征  

Population structure and quantitative dynamics ofGleditsia sinensis in Southeast Guizhou

作　　者：侯黔灵 赵安 梁有发 Hou Qianling;Zhao An;Liang Youfa(Qiandongnan Institute of Forestry,Kaili 556000,China;Qiandongnan Prefecture Public Welfare Forest Management Center,Kaili 556000,China)

机构地区：[1]黔东南州林业科学研究所,贵州凯里556000 [2]黔东南公益林中心,贵州凯里556000

出　　处：《江苏林业科技》2024年第5期9-13,19,共6页Journal of Jiangsu Forestry Science & Technology

基　　金：2021年度及2022年度黔东南州科技计划项目“黔东南州皂荚种质资源调查及收集保存”(黔东南科合基础[2021]06号)

摘　　要：为揭示黔东南皂角种群结构特征和数量动态变化,采用“空间代替时间”方法和匀滑修正技术,编制径级结构图、种群静态生命表,绘制死亡率曲线、存活曲线、消失率曲线和生存分析函数曲线及时间序列预测模型。研究发现种群径级结构显示总体为衰退型;种群存活曲线呈凹型,属Ⅲ型,在1—3龄级表现为幼树期死亡率较高,3龄级后个体的数量趋于稳定,存活率相对较高;生存率S(i)随着龄级增加而下降,累计死亡率F(i)随着龄级增加而增加,变化幅度均在1—3龄级表现明显;死亡密度f(ti)和危险率λ(ti)在1龄级最大,分别为34%和98.51%,随着龄级增加均呈下降趋势。数量变化动态指数V pi=0.38>0,表明无外界干扰时,种群属于增长型种群,V′pi=0.001>0,说明皂角种群对外界干扰敏感,受外界随机干扰时种群增长趋势不明显;在未来2,4,6,8个龄级时间后,预测结果显示,如果不对皂角进行人工干预、减少外界干扰和增加幼树数量,皂角种群最终走向衰退。In order to reveal the structural characteristics and quantitative dynamics of the population of Gleditsia sinensis in Southeast Guizhou,the“space replacing time”method and smoothing correction technique were used to compile a diameter class structure diagram and a static life table of the population.Mortality curves,survival curves,disappearance rate curves,survival analysis function curves,and time series prediction models were further plotted.The results showed that the population size class structure exhibited a declining pattern overall;The survival curve of the population showed a concave shape,belonging to TypeⅢ.In the age range of 1-3,the mortality rate was higher during the sapling stage,and after that,the number of individuals tended to stabilize,resulting in a relatively high survival rate;The survival rate S(i)decreased with age grade,while the cumulative mortality rate F(i)increases with age grade,with significant changes observed in age grades 1-3;Death density f(ti)and risk rateλ(ti)were the highest at age 1,accounting for 34%and 98.51%,respectively,showed a decreasing trend with increasing age.The dynamic index of quantity change V pi=0.38>0 indicated that the population belongs to a growth type without external interference,and V′pi=0.001>0 indicated that the Gleditsia sinensis population was sensitive to external interference,and unobvious in the population growth trend is not obvious when subjected to random external interference;For Age 2,4,6,and 8 groups in the future,the predicted results showed that if artificial intervention not carried out,external interference not reduced,and the number of young trees not increased,then the population would eventually decline and even perish.

关 键 词：皂角 空间代替时间 种群数量动态 静态生命表 

分 类 号：Q948.15[生物学—植物学]