Japanese knotweed (Reynoutria japonica) and the other invasive knotweeds, collectively known as knotweed s.l., are significant invasives worldwide, especially of riparian areas. While R. japonica and other knotweed s.l. can reproduce sexually, their dispersal to and spread within new regions is often accomplished through vegetative reproduction from rhizome and stem fragments. Once established, knotweed s.l. can displace riparian plants, meaning that soil stability once provided by displaced roots is lost, carrying significant knock‐on implications for watershed management. We propose that knotweed s.l. rhizomes both displace roots and the structure they provide to soil, and also amplify bank‐erosion forces, especially during floods. Further, erosive forces create propagules, with larger flow events creating larger numbers of propagules and providing the vector for short‐ and long‐distance downstream spread within the watershed. Induced erosion is therefore the main driver of knotweed s.l. invasions along waterways. As some hydrological regimes shift towards more frequent and severe storm events in response to climate change, positive feedback loops may develop in these regions between existing knotweed s.l. populations, sudden riverbank failure, and increased flood‐related damage, with presumably significant impacts on riparian infrastructure. While the continued spread of this invasive could have significant riparian flood resiliency consequences if left unchecked, mindful action to control these plants is likely to be beneficial financially, socially, and ecologically within any invaded watershed.

中文翻译：

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入侵的日本虎杖（Reynoutria japonica Houtt。）和相关的虎杖作为河岸侵蚀的催化剂

日本虎杖（Reynoutria japonica）和其他侵入性虎杖（knotweed sl），在世界范围内，特别是对河岸地区，是重要的侵入性。尽管日本粳稻和其他虎杖sl可以有性繁殖，但它们在根茎和茎碎片的无性繁殖通常是通过无性繁殖实现的。一旦建立，虎杖SL可以取代河岸植物，也就是说，稳定土曾经流离失所的根源提供丢失，携带显著连锁反应，对流域管理的影响。我们建议虎杖sl根茎不仅置换根系以及它们提供给土壤的结构，而且还会放大河岸侵蚀力，尤其是在洪水期间。此外，侵蚀力会产生繁殖体，较大的流动事件会产生大量的繁殖体，并为流域内短距离和长距离下游传播提供了载体。因此，诱发侵蚀是虎杖sl沿水道入侵的主要驱动力。随着一些水文体制因应气候变化而转向更频繁和更严重的暴风雨事件，这些地区的现有虎杖sl之间可能会形成正反馈回路。人口，突然的河岸故障以及与洪水有关的破坏增加，可能对河岸基础设施产生重大影响。如果不加控制，这种入侵的持续蔓延可能会带来严重的河岸抗洪能力后果，但是在任何被入侵的流域内，谨慎地控制这些植物的行动可能在经济，社会和生态上都是有益的。