热带亚热带植物学报2024，Vol.32Issue(5)：571-578,8.DOI:10.11926/jtsb.4825
贵州大沙河国家级自然保护区野生银杉种群结构和动态分析
Population Structure and Dynamic Analysis of Wild Cathaya argyrophylla in Dashahe National Nature Reserve,Guizhou,China
摘要
Abstract
Cathaya argyrophylla is one of the endemic rare and endangered wild plant with extremely small population in China,and is also the key protected object and flagship species in Guizhou Dashahe National Nature Reserve.Based on survey data of wild C.argyrophylla in the reserve in 2022,the quantitative dynamic index was calculated,static life table was compiled,survival curve was drawn,and survival function and spectral analysis were introduced to describe its structural dynamics.The results showed that the age structure of wild C.argyrophylla population was inverted J-type,and the dynamic change index of population(Vpi)was 39.43％,which was greater than Vpi′ and both of them were greater than 0,indicating that the C.argyrophylla population was a growth type,but the growth was slow,and it was sensitive to external disturbance.The survival curve of the population belonged to Deevey-Ⅱ type,and the survival rate,cumulative mortality rate,mortality density and risk rate changed greatly in age class from Ⅰ to Ⅲ stage,and then tended to be stable.The life spectral analysis showed that the Ⅲ age class was the main stage affecting C.argyrophylla population.Therefore,the large number of young individuals and high mortality rates of C.argyrophylla in the reserve was the main reason leading to the difficulties of regeneration.It was suggested that the reserve should strengthen the care of C.argyrophylla seedlings and improve the living environment,so as to promote the natural regeneration and recovery of C.argyrophylla population.关键词
银杉/种群结构/静态生命表/存活曲线/生存分析/谱分析Key words
Cathaya argyrophylla/Population structure/Static life table/Survival curve/Survival analysis/Spectral analysis引用本文复制引用
王林津,杨瑞,韩继怀,勾伟,赵洋洋,高旭..贵州大沙河国家级自然保护区野生银杉种群结构和动态分析[J].热带亚热带植物学报,2024,32(5):571-578,8.基金项目
贵州省科技计划项目(黔科合支撑[2020]1Y011) （黔科合支撑[2020]1Y011）
贵州省林业科研项目(黔林科合[2024]06) （黔林科合[2024]06）
贵州大沙河国家级自然保护区项目(2023009390455714091-001)资助This work was supported by the Project for Science and Technology Planning in Guizhou Province(Grant No.[20201Y011],the Forestry Scientific Research Project of Guizhou Province(Grant No.[2024]06),and the Project of Dashahe National Nature Reserve in Guizhou(Grant No.2023009390455714091-001). （2023009390455714091-001）
