预测临灭绝的虫Tillandsia utriculata的潜在恢复:一种基于代理的建模方法
Alexandra M Campbell1, Anna C Kula1, Rachel S Jabaily2
1Department of Mathematics and Statistics, Rhodes College, Memphis, Tennessee, United States of America.
PLoS computational biology
|June 10, 2025
概括
侵入性虫威胁着临灭绝的甲虫. 由掠食驱动的Tillandsia utriculata的快速进化,将繁殖转移到更小的尺寸,影响种群的生存能力,并需要更高的发芽率才能生存.
科学领域:
- 生态生态学 生态生态学
- 进化生物学 进化生物学
- 保护生物学 保护生物学
背景情况:
- 侵入性物种,如墨西哥 (Metamasius callizona),对生物多样性构成重大威胁.
- 佛罗里达州的临灭绝的虫Tillandsia utriculata面临着严重的人口下降,这是由于这种入侵性虫.
- 幼虫幼虫消耗了花的核心,经常在繁殖之前导致死亡.
研究的目的:
- 为了建模Tillandsia utriculata种群在入侵虫掠食下的生态和进化动态.
- 研究虫捕食所造成的自然选择如何改变T. utriculata种群的遗传组成.
- 评估改变遗传组成对T. utriculata种群长期生存能力的影响.
主要方法:
- 开发了一个基于代理的模型来模拟T. utriculata在多代人中的人口动态.
- 该模型将花朵生产的最小诱导大小 (MSI) 作为遗传特征纳入.
- 模拟探索了虫捕食对人口生存能力和遗传转移的影响,包括参数不确定性分析.
主要成果:
- 虫的掠食大大增加了T. utriculata种群生存所需的发芽率.
- 维持与非捕食场景相比较的种群规模需要非常高的发芽率和有限的捕食时间.
- 在100年中,平均MSI的下降被观察到,这种趋势被虫的掠食加剧.
结论:
- 侵入性虫掠食驱动了T. utriculata的快速进化变化,特别是减少了诱导繁殖的最低尺寸.
- 这些进化转变,再加上高的死亡率,需要更高的发芽率,以使人口持续存在.
- 对T. utriculata的保护策略必须考虑直接掠食和诱导进化反应的综合影响.
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