热带亚热带植物学报2026，Vol.34Issue(1)：21-33,13.DOI:10.11926/jtsb.4964
弄岗喀斯特季节性雨林蚬木种群时空格局动态研究
Dynamic Study on the Spatio-Temporal Pattern of Excentrodendron tonkinense Population in Nonggang Karst Seasonal Rainforest,South China
摘要
Abstract
Excentrodendron tonkinense,a national second-class key protected wild plant and one of the dominant species in the karst seasonal rainforest,still faces the threat of environmental disturbances.To explore the spatial distribution dynamics of its population,this study analyzed the relationship between population distribution dynamics and environmental factors based on the population and environmental survey data of a 15 hm2 plot in the karst seasonal rainforest of Nonggang,Guangxi from 2011 to 2021,using spatial point pattern methods and zero-inflated models.The results showed that the number of individuals in the population decreased from 1851 to 1786 over 10 years.The proportion of small diameter classes(1-5 cm)was over 50%in all years,and the diameter class structure was inverted"J"shaped.The population was significantly aggregated at the 0-50 m scale in three years,and the overall aggregation intensity of the population was mainly driven by the aggregation degree of the spatial distribution pattern of small trees.The distribution range of the population was significantly affected by soil moisture content,total phosphorus and total potassium in the habitat,and its abundance changes were influenced by both biotic and abiotic factors.The spatial distribution of the population had strong habitat specificity.Adult trees preferred habitats with low concavity and low diversity,while small trees preferred habitats with high plant diversity.Under well-protected conditions,the population size of E.tonkinense still needs to be dynamically monitored.In specific conservation practices,it is necessary to focus on protecting slope habitats and reducing human disturbances.关键词
蚬木/时间动态/空间分布/径级结构/零膨胀模型Key words
Excentrodendron tonkinense/Temporal dynamics/Spatial distribution/Diameter class structure/Zero-inflated Poisson model引用本文复制引用
陈扬宇,王斌,李冬兴,陆芳,李健星,陶旺兰,郭屹立,向悟生,李先琨..弄岗喀斯特季节性雨林蚬木种群时空格局动态研究[J].热带亚热带植物学报,2026,34(1):21-33,13.基金项目
国家自然科学基金项目(32360281,32260276) （32360281,32260276）
弄岗喀斯特生态系统广西野外科学观测研究站科研能力建设项目(桂科23-026-273) （桂科23-026-273）
广西自然科学基金项目(2022GXNSFBA035552)资助 This work was supported by the National Natural Science Foundation of China(Grant No.32360281,32260276),the Project for Scientific Research Capacity Building of Nonggang Karst Ecosystem Observation and Research Station of Guangxi(Grant No.Guike23-026-273),the Project for Natural Science in Guangxi(Grant No.2022GXNSFBA035552). （2022GXNSFBA035552）
