一个成熟的植物入侵者仍然可能从增加基因多样性中获益 - - 在一个普通花园实验中从人工种群中获得的洞察力
L Y Watermann1, W Durka2,3, A Erfmeier1
1Kiel University, Institute for Ecosystem Research/Geobotany Kiel Germany.
Ecology and evolution
|February 17, 2025
概括
遗传多样性在不同生命阶段和环境中不同影响入侵物种的表现. 侵袭性种群在早期建立过程中可能会从更高的遗传多样性中受益,但本地种群表现出不同的反应.
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:
- 遗传多样性和竞争能力之间的相互作用对于理解生物入侵至关重要,但它们对人口表现的相对重要性仍然不清楚.
- 以前的研究往往侧重于单个植物表型,而不是人口层面的反应.
- 在人口混合物中对遗传多样性的实验性操纵提供了一种直接方法来评估其影响.
研究的目的:
- 调查操纵遗传多样性的直接影响侵袭性和本地Jacobaea vulgaris的种群表现.
- 为了检查遗传多样性如何与微观可用性和起源 (侵入性与本地) 相互作用,跨越不同的生命阶段.
- 为了确定遗传多样性,起源和微观点的可用性对人口成功的相对重要性.
主要方法:
- 在16个入侵种群和22个本地Jacobaea vulgaris种群中使用单核酸多态 (SNPs) 确定双对遗传距离.
- 为每个起源创造了15个de novo种群,具有不同程度的遗传多样性.
- 将这些种群暴露在三种微观现场可用性水平 (0,5,或10个Festuca rubra个体) 上,并使用通用线性模型在两个生长季节内监测表现.
主要成果:
- 对J.没有观察到基因多样性的持续有益影响. vulgaris 的人口. 俗 人口.
- 原住民群体表现出对增加遗传多样性的负面反应的倾向,特别是在有利的条件下,尽管这不是一个持久的模式.
- 侵袭性种群在早期建立过程中从增加的遗传多样性中显示出潜在的好处,但在受限的微观站点可用性下,这种效应减少了.
结论:
- 遗传变异可以在特定环境条件下支持种群的建立和表现.
- 遗传多样性,起源和微观现场的相对重要性随着两年生物种的生命阶段而变化.
- 保护工作应侧重于限制在被入侵地区的传播物种的增加,以管理即使是成熟的入侵物种.
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