Department of Environmental Studies, State University of New York at Potsdam, Potsdam, USA.
Department of Geology, State University of New York at Potsdam, Potsdam, USA.
Sci Rep. 2022 Mar 28;12(1):5270. doi: 10.1038/s41598-022-09194-w.
Purple loosestrife (Lythrum salicaria L.) is an invasive, herbaceous plant, frequently found in wetlands, creating monoculture stands, resulting in intensive management strategies in central New York, Ontario, and Quebec. The goal of this study was to identify the extent of infestations and to investigate factors that promote the spread of purple loosestrife. We attempted to answer several questions regarding level of infestation, connection to mowing, and influence of culverts. During flowering season in July and August, 2017-2019, we mapped infestations along 150 km (93 miles) of state highway between the Adirondack Park and the St. Lawrence River using the ESRI Collector app. The results of our preliminary analysis revealed significant increase in the number of plants (P < 0.001). In addition, a linear correlation analysis demonstrated a higher loosestrife density with an increase in plant species richness and a decrease in the distance to the closest infestation and wetland (P < 0.001 each). We found no statistical evidence that mowing promotes the spread of loosestrife. As expected, there were more individual infestations in highway ditches, but larger and denser infestations in wetlands (P = 0.003 in 2019). Culverts enable purple loosestrife to spread underneath highways and should be managed to prevent spread.
紫茎泽兰（Lythrum salicaria L.）是一种入侵性草本植物，常生长在湿地中，形成单一种群，在纽约州中部、安大略省和魁北克省采取了密集的管理策略。本研究的目的是确定其入侵范围，并研究促进其传播的因素。我们试图回答几个问题，包括侵染程度、与刈割的关系以及涵管的影响。在 2017 年至 2019 年的 7 月和 8 月开花季节，我们使用 ESRI Collector 应用程序沿阿迪朗达克公园和圣劳伦斯河之间的 150 公里（93 英里）州际公路沿线绘制了侵染图。初步分析结果表明，植物数量显著增加（P < 0.001）。此外，线性相关分析表明，随着植物物种丰富度的增加和与最近的侵染区和湿地的距离的减小，泽兰的密度更高（P < 0.001 各）。我们没有发现刈割促进泽兰传播的统计证据。正如预期的那样，高速公路沟渠中有更多的个体侵染，但湿地中的侵染更大且更密集（2019 年 P = 0.003）。涵管使泽兰能够在公路下面传播，应加以管理以防止其传播。
