In order to manage invasive plant species efficiently, it is necessary to have a thorough understanding of different strategies of population control, including the underlying mechanisms of action and the consequences for target populations. Here, I explored the effectiveness of biomass removal as a method of control for the invasive perennial herb Lupinus polyphyllus. More specifically, using seed material from 11 populations, I assessed among-population variation (if any) in plant compensatory growth as a response to annual biomass removal under standardised growing conditions over two consecutive years, and quantified the demographic effects of a single biomass-removal event. In all study populations, annual biomass removal reduced plant size, flowering probability, and shoot and root biomass. Biomass removal also reduced plant survival and the number of flowering shoots, but these effects were pronounced at certain time points only. A population-level demographic analysis revealed that a single biomass-removal event considerably decreased the long-term population growth rate (λ); this decline in λ was due to a reduction in plant fecundity followed by survival and growth. These findings suggest that annual mowing has the potential to curb invasions of L. polyphyllus because plants are not able to fully compensate for drastic biomass loss.

为了有效地管理外来入侵物种，有必要对种群控制的不同策略有透彻的了解，包括潜在的作用机理和对目标种群的影响。在这里，我探讨了去除生物质作为控制多年生入侵多年生草本羽扇豆的方法的有效性。。更具体地说，我使用11个种群的种子材料，评估了植物补偿性生长的种群间差异（如果有），作为对连续两年在标准生长条件下每年生物量去除的响应，并量化了单一生物量的人口统计学影响-移除事件。在所有研究种群中，每年去除生物量减少了植物大小，开花几率以及苗和根生物量。生物量去除还降低了植物的存活率和开花芽的数量，但是这些影响仅在某些时间点才明显。人口水平的人口统计分析表明，单个生物量去除事件大大降低了长期人口增长率（λ）；λ的下降是由于植物繁殖力下降，然后是生存和生长。因为植物不能完全补偿急剧的生物量损失，所以多叶利什曼原虫。