Guo Chaodan, Zhao Caiyun, Li Feifei, Huang Jianfeng
Institute of Ecology, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
The Administration Bureau of Encheng National Nature Reserve, Chongzuo 532200, China.
Life (Basel). 2022 Nov 4;12(11):1785. doi: 10.3390/life12111785.
Invasive alien plants have invaded various habitats, posing a threat to biodiversity. Several hypotheses have been proposed to explain the mechanisms of invasion, but few studies have considered the characteristics of the invaded communities and the effects of human interference in the invasion. In this study, we compared the invasibility of three different habitats: abandoned land, eucalyptus plantations, and natural secondary forests. We explored the effects of species diversity, phylogenetic diversity, and disturbance factors on the invasibility of different habitats. The results showed that the invasibility of abandoned land was the highest and the invasibility of the natural secondary forest was the lowest. Phylogenetic indicators affected the invasibility of abandoned land and eucalyptus plantations, and disturbance factors affected the invasibility of all three habitats, while the characteristics of the invaded communities had a weak impact. Our research provided supporting evidence for Darwin's naturalization hypothesis and his disturbance hypothesis but found no relationship between biotic resistance and invasibility. This study indicated that the differences among habitats should be considered when we prove Darwin's naturalization hypothesis in nature reserves.
外来入侵植物已侵入各种生境，对生物多样性构成威胁。人们提出了几种假说以解释入侵机制，但很少有研究考虑被入侵群落的特征以及人类干扰在入侵过程中的作用。在本研究中，我们比较了三种不同生境的可入侵性：弃耕地、桉树林和天然次生林。我们探究了物种多样性、系统发育多样性和干扰因素对不同生境可入侵性的影响。结果表明，弃耕地的可入侵性最高，天然次生林的可入侵性最低。系统发育指标影响弃耕地和桉树林的可入侵性，干扰因素影响所有三种生境的可入侵性，而被入侵群落的特征影响较弱。我们的研究为达尔文归化假说及其干扰假说提供了支持证据，但未发现生物抗性与可入侵性之间存在关联。该研究表明，在自然保护区验证达尔文归化假说时应考虑生境之间的差异。
