Russian Journal of Biological Invasions Pub Date : 2021-03-31 , DOI: 10.1134/s2075111721010082 M. S. Kholenko , Yu. A. Semenishchenkov
Abstract
The invasive North American species Fraxinus pennsylvanica Marsh. has a high reproductive potential in natural and urban habitats. The species is characterized by intense seed reproduction and the active distribution of seeds. However, their germination requires quite specific conditions, which are found mainly in floodplain ecosystems and occasionally in mesophytic and xerophytic urban habitats. Intense vegetative renewal allows ash trees to linger in their habitats for a long time, including after disturbances, but it is ineffective for the rapid spread of the species and occupation of new territories. F. pennsylvanica actively penetrates into natural and seminatural communities, acts as an edifier and dominant, displaces, and (or) prevents the regeneration of species of natural flora. However, these features are not pronounced in all habitats, but mainly in river valleys, including forest cultures with a simplified structure. The possible spread of F. pennsylvanica diaspores into the river floodplains by birds and humans (randomly) is of concern, because it can lead to the mass distribution of the species with a subsequent threat to the biodiversity of river valleys.
中文翻译:
外来物种Fraxinus pennsylvanica Marsh的繁殖可能性。在布良斯克市的森林看台上
摘要
北美入侵物种Fraxinus pennsylvanica Marsh。在自然和城市栖息地具有很高的繁殖潜力。该物种的特征在于强烈的种子繁殖和种子的主动分布。然而,它们的发芽需要相当特殊的条件,主要在洪泛区生态系统中发现,偶尔在中生和干生的城市栖息地中也可以发现。强烈的植物更新可使白蜡树在生境中徘徊很长时间,包括在受到干扰之后,但是对于物种的快速传播和对新领土的占领无效。宾夕法尼亚州烟草积极地渗透到自然和半自然的社区中,充当陶艺者和主导者,驱逐和(或)阻止自然植物物种的再生。但是,这些特征并非在所有栖息地中都很明显,而主要是在流域,包括结构简化的森林文化中。令人担忧的是,鸟类和人类可能(无规地)将宾夕法尼亚州假单胞菌的孢子散布到河漫滩中,因为这可能导致该物种的大量分布,进而威胁到河谷的生物多样性。