Arroyo-Cosultchi Gabriel, Golubov Jordan, Solórzano Jonathan V, Mandujano Maria C
Programa de Botánica, Colegio de Posgraduados, Km. 36.5 Carr. México-Texcoco, Montecillo, Texcoco 56230, Mexico.
Departamento de Ecología y Recursos Naturales, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Mexico City 04510, Mexico.
Plants (Basel). 2022 Mar 3;11(5):689. doi: 10.3390/plants11050689.
Until recently, little research has focused on determination of the population dynamics of invasive species and evaluating their genetic variation. Consequently, not much is known of what drives clonal invasive species and their demography. Here, we describe the population dynamics of (Crassulaceae), considered invasive to several countries. We quantified the demography of a population in central Mexico using integral projection models (IPM) in a population that reproduced asexually exclusively through plantlets. The effect of clonal recruitment on population growth rate (λ) was evaluated by changing plantlet survival and simulating management scenarios that used previous data of watering and seven experimental herbicide treatments. The finite rate of population increase indicated that this population is growing (above one) and with water availability, growth rates will only accelerate. The IPM showed that plantlet survival and recruitment were the most critical steps in the cycle for the population, and simulations of different management scenarios showed that reducing plantlet survival significantly decreased λ only in two out of the seven herbicides used.
直到最近，很少有研究关注入侵物种的种群动态测定以及评估它们的遗传变异。因此，对于驱动克隆入侵物种及其种群统计学特征的因素了解不多。在这里，我们描述了被认为对多个国家具有入侵性的景天科植物的种群动态。我们使用积分投影模型（IPM）对墨西哥中部一个仅通过无性繁殖的小植株进行繁殖的种群的种群统计学特征进行了量化。通过改变小植株存活率并模拟使用先前浇水数据和七种实验性除草剂处理的管理情景，评估了克隆繁殖对种群增长率（λ）的影响。种群增长的有限速率表明该景天科植物种群正在增长（大于1），并且在有水供应的情况下，增长率只会加快。IPM表明，小植株存活和繁殖是该种群周期中最关键的步骤，不同管理情景的模拟表明，在使用的七种除草剂中，只有两种除草剂通过降低小植株存活率显著降低了λ。
