Ecology, Department of Biodiversity, Ecology and Evolution, Complutense University of Madrid, 28040, Madrid, Spain.
Department of Biogeography and Global Change, National Museum of Natural Sciences, Spanish National Research Council, 28006, Madrid, Spain.
Sci Rep. 2018 Nov 15;8(1):16834. doi: 10.1038/s41598-018-35294-7.
Understanding the mechanisms that support the arrival, establishment and spread of species over an introduced range is crucial in invasion ecology. We analysed the unintentionally introduced herbaceous species that are naturalised in the five Mediterranean-climate regions. There is an asymmetry in the species flows among regions, being the Iberian Peninsula the main donor to the other regions. At interregional scale, the species' capacity to spread among regions is related to the ecological versatility of the species in the donor area (Iberian Peninsula). At intraregional scale, the species' capacity to successfully occupy a complete region first depends on the time elapsed from its introduction and afterwards on the degree of occurrence in the region of origin, which is commonly related to its chance of coming into contact with humans. Information on exotic species in their origin region provides insights into invasion process and decision-making to reduce the risks of future invasions.
理解支持物种在引入范围内到达、建立和扩散的机制是入侵生态学中的关键。我们分析了在五个地中海气候区自然归化的非故意引入的草本物种。各地区间的物种流动存在不对称性，伊比利亚半岛是其他地区的主要供体。在区域间尺度上，物种在区域间传播的能力与供体区域（伊比利亚半岛）中物种的生态多功能性有关。在区域内尺度上，物种成功占据整个区域的能力首先取决于其引入后的时间流逝，其次取决于其在起源地区的出现程度，这通常与其与人类接触的机会有关。关于起源地区外来物种的信息提供了对入侵过程和决策的深入了解，以减少未来入侵的风险。
