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大心的入侵者:范围扩张和寄生虫感染对青中心脏质量的影响
Hailey R Crane1, Lee A Rollins2, Richard Shine3
1Environmental Studies Program, Brandeis University, Waltham, USA.
Integrative zoology
|January 10, 2025
概括
来自入侵前线的青进化了更大的心脏,有助于分散和适应. 肺寄生虫减少了所有的心脏大小,影响了它们的有氧能力.
科学领域:
- 进化生物学是进化的生物学.
- 生态生态学 生态生态学
- 寄生虫学的寄生虫学
背景情况:
- 在澳大利亚的 (Rhinella marina) 侵袭推动了分散和气候适应特征的快速演变.
- 更大的心脏大小支持增强的运动运动活动和干燥耐受性.
- 寄生虫感染可以影响宿主心脏大小,影响生理功能.
研究的目的:
- 为了调查入侵史和肺寄生虫暴露对子心脏大小的影响.
- 为了确定进化适应入侵前线是否影响心血管特征.
- 评估实验性肺感染如何改变心脏质量和心血管功能.
主要方法:
- 研究了来自不同入侵历史地点的父母共同的园林养的甘.
- 在实验中将青后代暴露在线虫肺 (Rhabdias pseudosphaerocephala) 的传染性幼虫中.
- 在不同人群和实验组之间测量和比较心脏大小 (质量).
主要成果:
- 来自入侵前线种群的后代与长期存在的种群相比,表现出明显更大的心脏.
- 对肺幼虫的实验暴露导致所有研究的种群的心脏质量下降.
- 肺虫感染对心脏质量产生了负面影响,不管青种群的入侵历史如何.
结论:
- 心血管特征,包括心脏大小,在青入侵澳大利亚期间经历了快速演变.
- 肺寄生虫 (Rhabdias pseudosphaerocephala) 可以调节的心脏质量,可能会影响宿主有氧能力.
- 侵袭历史和寄生虫负载是影响甘青进化和生理学的关键因素.
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