生态环境学报2023，Vol.32Issue(10)：1741-1749,9.DOI:10.16258/j.cnki.1674-5906.2023.10.003
珍稀濒危植物海南粗榧群落树种组成与种间联结性
Tree Species Composition and Interspecific Associations of Rare and Endangered Plant Cephalotaxus hainanensis Community
摘要
Abstract
The distribution of Cephalotaxus hainanensis in the wild is infrequent,and it possesses a limited ability to regenerate naturally.This species is under serious threat due to deforestation by humans,resulting in a significant decline in its population size.To explore the composition of species and the interspecific relationships within the Cephalotaxus hainanensis community,understand the mechanisms contributing to its endangerment,establish appropriate habitats for population restoration,and develop targeted protection measures,this study conducts an analysis on species diversity and the flora composition of associated tree species within Cephalotaxus hainanensis community plots in Hainan Tropical Rainforest National Park through field surveys.This study employed statistical methods such as the variance ratio(Rv),χ2-test,association coefficient(AC),percentage co-occurrence(PC),Pearson correlation coefficient(rp),and Spearman rank correlation coefficient(rs),to comprehensively explore overall correlations,the significance of interspecific associations,and the strength of associations among 16 common tree species within the Cephalotaxus hainanensis community.The results indicate that within 8 sample plots measuring 20 m in length and width,a total of 105 species belonging to 78 genera and 44 families of woody tree species were identified.The plant flora was predominantly tropical,accounting for 65.9%of the total number of families.The overall correlation of 16 common tree species showed no significant negative correlation(Rv=0.534,statistics W=4.27);χ2-test results indicate that the number of negatively correlated species pairs exceeded the number of positively correlated species pairs,and there were no significant correlations among species pairs in the community.There were nine species pairs with an AC>0.67 and seven species pairs with a PC>0.75,and the correlation between most species was weak.Cephalotaxus hainanensis had significant positive correlation only with Syzygium globiflorum(P = 0.018).The correlation tests of rp and rs indicate that there were more significantly negative associations among species pairs than significantly positive associations.Cephalotaxus hainanensis was significantly negatively correlated with Tabernaemontana bovin(P=0.027),and the vast majority of species pairs were not significantly correlated.In summary,the overall structure of the Cephalotaxus hainanensis community is relatively loose,and species may be subject to frequent changes.The community is still in an unstable stage,and the Cephalotaxus hainanensis tend to survive independently.To address the risk of population decline in Cephalotaxus hainanensis,individual protection should be strengthened,and the habitat of the community should be properly transformed to increase the population size.关键词
海南粗榧/种间联结/国家公园/伴生树种/植物区系Key words
Cephalotaxus hainanensis/interspecific association/national park/associated tree species/flora分类
生物科学引用本文复制引用
王如,农寿千,彭文成,吴彪,杨佳,廖立国..珍稀濒危植物海南粗榧群落树种组成与种间联结性[J].生态环境学报,2023,32(10):1741-1749,9.基金项目
海南省省属科研院所技术创新专项(SQKY2022-0033) （SQKY2022-0033）
