广西林业科学2025，Vol.54Issue(5)：481-487,7.DOI:10.19692/j.issn.1006-1126.20250502
濒危植物桫椤和大叶黑桫椤种群结构与动态特征差异
Differences in Population Structures and Dynamic Characteristics between Endangered Plants Alsophila spinulosa and Alsophila gigantea
摘要
Abstract
In order to understand population structures and dynamic changes of endangered plants Alsophila spi-nulosa and Alsophila gigantea,natural populations of A.spinulosa and A.gigantea were selected as research ob-jects.By sample plot investigation,fixed monitoring sample plots were set up,and height level was used instead of age level to compile time-specific life table and draw survival and mortality curves.Survivals and dynamics of populations were analyzed.Simple moving average method was used to predict future development trends of two populations.Results showed that differences in structures and change trends between two populations were not significant.Structures of two populations were growth oriented,with larger number of individuals and higher mortality rate of young period.Density of A.gigantea population was higher than that of A.spinulosa population,with more young and middle-aged individuals.Life expectancy of A.spinulosa population was generally higher than that of A.gigantea population,with stronger survival ability.Survival curve of A.spinulosa population tend-ed towards Deevey-Ⅲ type,while survival curve of A.gigantea population tended towards Deevey-Ⅱ type.A.spinulosa population was in better living condition than A.gigantea population.A.gigantea population was more sensitive to external disturbances than A.spinulosa population.After 2,4,6 and 8 age classes,numbers of survival individuals of two populations in most age classes increased.After 8 age classes,advantages of A.gi-gantea population would expand.Compared with A.spinulosa population,A.gigantea population had stronger regeneration ability and development momentum,but had higher sensitivity to external disturbances and lower stability.关键词
种群结构/种群动态/静态生命表/生存函数/濒危植物/桫椤/大叶黑桫椤Key words
population structure/population dynamic/time-specific life table/survival function/endangered plant/Alsophila spinulosa/Alsophila gigantea分类
农业科技引用本文复制引用
于永辉,陆珍先,覃亚丽,姜冬冬,林建勇,卢中强..濒危植物桫椤和大叶黑桫椤种群结构与动态特征差异[J].广西林业科学,2025,54(5):481-487,7.基金项目
广西自筹经费林业科技项目(2025GXZCLK72) （2025GXZCLK72）
广西自然科学基金项目(2021GXNSFAA220025) （2021GXNSFAA220025）
