Institute of Environment and Ecology & School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China; Shanghai Key Lab for Urban Ecological Processes and Eco-Restoration, East China Normal University, Shanghai 200241, China.
Institute of Environment and Ecology & School of the Environment and Safety Engineering, Jiangsu University, Zhenjiang 212013, China.
Sci Total Environ. 2021 May 10;768:144518. doi: 10.1016/j.scitotenv.2020.144518. Epub 2021 Jan 7.
Invasive alien plants (IAPs) can negatively affect plant taxonomic diversity, community stability, and invasibility in the invaded habitats. This study aimed to assess the degree of influence of the IAP Solidago canadensis L. under various levels of invasion (i.e., light, moderate, and heavy invasion based on its relative abundance in the invaded communities) on plant taxonomic diversity, community stability, and invasibility. In addition, we determined the contribution of plant taxonomic diversity to community stability and invasibility under various levels of S. canadensis invasion. The degree of influence of S. canadensis on plant taxonomic diversity and community stability increases as the level of S. canadensis invasion increases. Community invasibility increases as the level of S. canadensis invasion increases. The competitive advantage of S. canadensis is negatively associated with all indexes of plant taxonomic diversity and community stability but positively connected with community invasibility. Community stability is positively related to Shannon's diversity and Simpson's dominance indexes but negatively associated with community invasibility. Inversely, communities were more likely to be invaded when they had less plant taxonomic diversity. Thus, plant communities with lower values of plant taxonomic diversity and community stability are more vulnerable to S. canadensis invasion. Plant diversity causes a greater pressure on community stability than the other indexes of plant taxonomic diversity under various levels of S. canadensis invasion. However, the contribution intensity of the number of plant species to community invasibility is higher than the other indexes of plant taxonomic diversity under various levels of S. canadensis invasion.
入侵外来植物（IAPs）会对入侵生境中的植物分类多样性、群落稳定性和可入侵性产生负面影响。本研究旨在评估入侵植物加拿大一枝黄花（Solidago canadensis L.）在不同入侵水平（即根据其在入侵群落中的相对丰度，分为轻度、中度和重度入侵）下对植物分类多样性、群落稳定性和可入侵性的影响程度。此外，我们还确定了在不同水平的 S. canadensis 入侵下，植物分类多样性对群落稳定性和可入侵性的贡献。S. canadensis 对植物分类多样性和群落稳定性的影响程度随着其入侵水平的增加而增加。随着 S. canadensis 入侵水平的增加，群落的可入侵性也随之增加。S. canadensis 的竞争优势与植物分类多样性和群落稳定性的所有指标呈负相关，但与群落可入侵性呈正相关。群落稳定性与 Shannon 多样性和 Simpson 优势度指数呈正相关，但与群落可入侵性呈负相关。相反，当植物分类多样性较低时，群落更容易受到入侵。因此，植物分类多样性和群落稳定性较低的植物群落更容易受到 S. canadensis 的入侵。在不同水平的 S. canadensis 入侵下，植物多样性对群落稳定性的压力大于植物分类多样性的其他指标。然而，在不同水平的 S. canadensis 入侵下，植物物种数量对群落可入侵性的贡献强度高于植物分类多样性的其他指标。
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