西南林业大学学报2024，Vol.44Issue(7)：45-53,9.DOI:10.11929/j.swfu.202303076
小陇山天然油松林结构多样性动态特征研究
Dynamic Characteristics of Structural Diversity for Pinus tabulaeformis Natural Forest in Xiaolong Mountains
摘要
Abstract
According to 3 periods(i.e.,2010,2015 and 2020)investigated datasets on Pinus tabulaeformis natural forest in Xiaolong Mountains,the bivariate distributions of stand spatial structure parameter and DBH class were used to quantitatively describe the size and spatial structure characteristics.One-way ANOVA and multiple comparison method were used to analyze the differences of tree size distribution under the same spatial structure state among different periods.The α diversity indices were calculated to describe the dynamic trend of tree size diversity under same spatial structural state.The results showed over 50.0％trees with same DBH class were randomly distributed in different periods of P.tabulaeformis natural forest,and the size structural diversity of randomly distributed trees were the highest.The 6-8 cm DBH class individual trees surrounded by heterogen-eous species were the most common,and the size structural diversity of poorly mixed trees was higher.The DBH distribution of zero mixed trees was significantly different between 2010 and 2020(P＜0.05).The forest diameter class size was positively correlated with dominance in each period,and the size structural diversity of dominant and subdominant trees was higher.Over 60.0％of same DBH class trees were overlapped with the nearest adja-cent trees in each period,and the very dense and dense trees showed higher size diversity.The proportion of crowdedly distributed trees(C=0.50,0.75)in 2010 and 2015 was significantly different from that in 2020(P＜0.05).Therefore,the size structural diversity of different spatial structure states was poor in P.tabulaeformis nat-ural forest in Xiaolong Mountains,and its dynamic changes among different periods were not obvious.It is ur-gent to dynamically adjust and optimize forest structure to accurately improve forest quality.关键词
空间结构/二元分布/多样性/油松Key words
spatial structure/bivariate distribution/diversity/Pinus tabulaeformis分类
农业科技引用本文复制引用
沈亚洲,张青,刘文桢,刘巧,马剑敏,李明月,张岗岗..小陇山天然油松林结构多样性动态特征研究[J].西南林业大学学报,2024,44(7):45-53,9.基金项目
国家自然科学基金项目(32101504)资助 （32101504）
博士人才科研启动课题(校20210034)资助. （校20210034）
