Effects of the invasive alien plant Lupinus polyphyllus on the plant communities in road verges of high nature value

The aim of this publication was to explore the effects of the invasive alien plant Lupinus polyphyllus on the plant communities in road verges of high nature value (artrika vägkanter). The linked data was collected in 24 road verges, half of which were located in the county of Uppland. The other half were located in the counties of Värmland and Örebro. The 24 road verges were selected from the Swedish National Road Database (NVDB). In these sites, two types of 1 × 1 m plots were established. The first type was placed such that the dominating species was the invasive L. polyphyllus, and the second was placed as close as possible to the first one but such that the invasive was absent. This was done to ensure that the plant communities were as similar as possible before invasion. A plant inventory, including density and identity, of all plant species except for the true grasses (Poaceae) in the plots was performed. The litter depth was also recorded. The study is a part of the research program TRIIAS (https://triekol.se/triias/).本研究旨在探究外来入侵植物多叶羽扇豆（Lupinus polyphyllus）对高自然价值道路路缘带（artrika vägkanter）植被群落的影响。关联数据集采自24处该类道路路缘带样地，其中一半位于乌普兰郡，另一半分属韦姆兰郡与厄勒布鲁郡。该24处样地均选自瑞典国家道路数据库（Swedish National Road Database, NVDB）。在上述样地内，共设置两类1×1米样方：第一类样方以入侵物种多叶羽扇豆为优势种，第二类样方则尽可能紧邻第一类样方，但确保无该入侵物种存在，以此保证两类样地在入侵发生前的植被群落尽可能相似。研究人员对样方内除真禾草（禾本科，Poaceae）外的所有植物物种开展调查，记录其种群密度与物种信息，并同步测定枯落物厚度。 本研究隶属于TRIIAS研究项目（https://triekol.se/triias/）。