王春晓, 钟址非, 钱志军, 等. 福州琅岐岛不同林下外来植物入侵对比研究[J]. 西南林业大学学报(自然科学), 2024, 44(5): 1–10. DOI: 10.11929/j.swfu.202307016
引用本文: 王春晓, 钟址非, 钱志军, 等. 福州琅岐岛不同林下外来植物入侵对比研究[J]. 西南林业大学学报(自然科学), 2024, 44(5): 1–10. DOI: 10.11929/j.swfu.202307016
Wang Chunxiao, Zhong Zhifei, Qian Zhijun, Chen Ying, Huang Yunteng, Luo Zhen, Lin Xiting, Cao Shengxuan, Deng Chuanyuan. A Comparative Study on Alien Invasive Plants Under Different Forests in Langqi Island, Fuzhou[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202307016
Citation: Wang Chunxiao, Zhong Zhifei, Qian Zhijun, Chen Ying, Huang Yunteng, Luo Zhen, Lin Xiting, Cao Shengxuan, Deng Chuanyuan. A Comparative Study on Alien Invasive Plants Under Different Forests in Langqi Island, Fuzhou[J]. Journal of Southwest Forestry University. DOI: 10.11929/j.swfu.202307016

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福州琅岐岛不同林下外来植物入侵对比研究

A Comparative Study on Alien Invasive Plants Under Different Forests in Langqi Island, Fuzhou

  • 摘要: 外来植物入侵严重威胁海岛生物和生态安全。为探究琅岐岛台湾相思、朴树、柠檬桉林下草本层外来入侵植物的入侵状况及其与本地植物的种间关系,采用α多样性、生态位、种间联结、入侵性分析比较了不同林下外来入侵植物的多样性、生态位特征、外来入侵植物与本土植物的种间关系及入侵程度。结果表明:3种林下共调查到10种外来入侵草本植物,隶属于5科8属,其中三叶鬼针草的生态位宽度和重要值最大,在3种林下入侵广泛;柠檬桉林的外来入侵草本植物Shannon−Wiener指数显著高于朴树林,3种林下外来入侵草本植物的Pielou均匀度指数、Simpson优势度均无显著差异;3种林下多数外来入侵草本植物与本地优势植物生态位重叠程度和种间联结性均较低,种间竞争较弱;朴树和柠檬桉林草本群落的入侵强度系数和群落可入侵系数显著高于台湾相思林;3种林下多数外来入侵种与本地优势植物的竞争尚不激烈,但三叶鬼针草的入侵优势大,需要加强防控,同时保护群落灌草结构及物种多样性有助于提升群落对外来入侵种的抵抗力。

     

    Abstract: Alien plant invasion seriously threatens the biosecurity and ecological security of islands. In order to explore the invasion status of alien invasive plants in the understory herb layer of Acacia confusa, Celtis sinensis, and Eucalyptus citriodora in Langqi Island and their interspecific relationship with native plants, this study used α diversity, niche, interspecific association, and invasiveness analysis to compare the diversity, niche characteristics, interspecific relationship between alien invasive plants and native plants and the degree of invasion of alien invasive plants in different forests. The results showed that a total of 10 alien invasive herbaceous plants were investigated under 3 forests, belonging to 5 families and 8 genera. Among them, Bidens pilosa has the most considerable niche breadth and essential value, and is widely invaded under 3 forests. The Shannon-Wiener index of exotic invasive herbaceous plants in E. citriodora forest was significantly higher than that in C. sinensis forest. There was no significant difference in Pielou evenness index and Simpson dominance of exotic invasive herbaceous plants under the 3 forests. The niche overlap and interspecific association between most invasive herbaceous plants and native dominant plants in the three forests were low, and the interspecific competition was weak. The invasion intensity coefficient and community invasion coefficient of herb community in C. sinensis and E. citriodora forest were significantly higher than those in A. confusa forest. Most alien invasive species in the 3 forests were not competitive with the local dominant plants. Still, the invasion advantage of B. pilosa was enormous, and it was necessary to strengthen the prevention and control. At the same time, protecting the shrub-grass structure and species diversity of the community would help to improve the resistance of the community to alien invasive species.

     

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