从生理避难所的有限迁移限制了面对侵入性捕食者的本地胃类动物的救援
Mathilde Salamon1, Louis Astorg1, Antoine Paccard2
1Université du Québec à Montréal Montreal Quebec Canada.
Evolutionary applications
|October 23, 2024
概括
淡水胃类动物显示当地适应入侵掠食者和水平. 来自避难所的有限基因流量限制了救援潜力,影响了人口对生物入侵的抵御力.
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:
- 生物入侵威胁着全球的淡水生物多样性.
- 了解人口弹性需要检查适应性反应和人口统计学,但它们的相互作用是不太了解.
- 淡水 *Amnicola limosus* 在高性息地面临入侵性圆形虫,而低性息地则作为避难所.
研究的目的:
- 为了测试A. limosus对入侵掠食者和低环境的局部适应.
- 通过从避难人口向被入侵的人口迁移来调查人口统计和遗传救援的潜力.
- 评估当地适应和基因流如何相互作用以影响人口性.
主要方法:
- 实验室的相互移植实验评估了*A. limosus*的存活率和生育能力,包括和捕食者治疗.
- 聚合全基因组测序被用来分析沿/侵袭梯度沿着12个种群的遗传差异化.
- 分析了生命史特征和遗传模式,以推断适应和基因流动.
主要成果:
- 有证据表明,在避难所种群中,当地适应了低的条件,而在入侵种群中,则适应了圆的掠食.
- 检测到从低难民到高入侵地点的受限制的基因流动.
- 人口和基因救援的潜力受到自然分散模式的限制.
结论:
- 当地适应不同的环境压力 (,掠食) 形状 *A. limosus* 种群.
- 来自避难所的基因流量不足以拯救日益减少的入侵人口或保持遗传多样性.
- 保护战略必须考虑适应和基因流动之间的相互作用,以有效管理入侵物种的影响.
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