生态与农村环境学报2026，Vol.42Issue(6)：795-805,11.DOI:10.19741/j.issn.1673-4831.2025.0298
中国红树林北缘引种区和天然分布区秋茄种群结构与动态特征研究
Study on the Population Structure and Dynamic Characteristics of Kandelia obovata in the Northern Marginal In-troduction and Natural Distribution Regions of Mangroves in China
摘要
Abstract
This study aims to provide a scientific basis for the management and conservation of Kandelia obovata forests in the northern marginal introduction and natural distribution regions of mangroves in China,as well as to inform future north-ward expansion of mangroves.Based on field plot survey data,the population structure and dynamics of K.obovata planta-tions established since 1957 on Ximen Island,Zhejiang Province,and natural K.obovata populations in Fuding,Fujian Province,were characterized.The results reveal significant differences in height and diameter class structures between the two populations.The artificial population on Ximen Island was dominated by individuals with heights of 1.0-1.5 m and diameter classes Ⅲ-Ⅵ,with no individuals below 0.5 m in height or in diameter class Ⅰ.In contrast,the natural popu-lation in Fuding primarily consisted of individuals with heights of 2.0-2.5 m and below 0.5 m,and the diameter classes were mainly distributed in classes Ⅰ and Ⅳ-Ⅵ.Both populations exhibited Deevey Ⅱ-type survival curves,character-ized by relatively high mortality rates.The survival rate and cumulative mortality rate curves of both populations were com-plementary,with peak mortality density occurring at the first age class.The dynamic indices indicate pronounced fluctua-tions in Vn for both populations,with Vpi>V'pi>0,suggesting an overall growth trend but high sensitivity to external dis-turbances.Long-term projections of the artificial population on Ximen Island showed an increase in older individuals and a decline in younger individuals over 2,4,6,8,and 10 age classes,indicating difficulty in sustaining long-term population growth.In contrast,the natural population in Fuding was projected to increase steadily over extended periods.Spatial a-nalysis show that all four developmental stages of the natural population in Fuding and the small tree group of the artificial population on Ximen Island exhibited aggregated distribution patterns.In contrast,the large tree and old tree groups in the artificial population in Ximen Island displayed uniform distribution patterns.Overall,the growth performance,population development,and structural stability of the K.obovata plantation in Ximen Island were inferior to those of the natural K.obovata forest in Fuding.关键词
红树林北缘/秋茄/种群结构动态/空间分布格局/西门岛Key words
northern marginal region of mangroves/Kandelia obovata/population structure dynamics/spatial distribution pattern/Ximen Island分类
农业科技引用本文复制引用
刘孟兰,祁政宇,朱明栋,陈磊,王平,徐娜娜..中国红树林北缘引种区和天然分布区秋茄种群结构与动态特征研究[J].生态与农村环境学报,2026,42(6):795-805,11.基金项目
浙江省基础公益研究计划项目(LTGS23C030004) （LTGS23C030004）
国家自然科学基金项目(32201380) （32201380）
