Analysis of Spatial Structure of Quercus acutissima Forest in Different Age Groups
PANG Chen
CUI Junteng
SONG Wenqian
WANG Qi
PENG Jian
XU Xiaoyi
Abstract：The study focused on the spatial structure of Quercus acutissima forests in different age groups in the Sishe Mountain area of Jimo District,Qingdao.Field survey data was used to calculate the mingling,neighborhood comparsion,aggregation index,competition index,and spatial density index for different age groups and tree species.The results showed that the mingling of all age groups was low(0.15-0.24)and the neighborhood comparsion was around 0.50.The aggregation index ranged from 0.43 to 0.72,indicating a clustered distribution.The competition index was higher for middle-aged(268.64)and young(223.88)stands compared to mature stands(100.65).The spatial density index ranged from 0.76 to 0.83,also indicating a clustered distribution.There were significant differences in mingling,neighborhood comparsion,and competition index among different tree species.Q.acutissima had the lowest mingling(0.12),while Pinus tabulaeformis,Toona sinensis,and Celtis sinensis had the highest mingling(1.00).The neighborhood comparsion was highest for Celtis sinensis(0.86),followed by Toona sinensis(0.80),and the other tree species were around 0.50.The competition index was highest for Q.acutissima(189.74),followed by Robinia pseudoacacia(67.56),and the competition index for other tree species was no more than 10.There was no significant difference in spatial density index among different tree species.The results suggest that the stands have high competition and low species diversity,and measures should be taken to optimize the spatial structure of the stands to improve their stability and quality.
Keywords：Quercus acutissima forestsstand spatial structureforest management
Publication Date：2024-12-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 18-25 )