飞行脊椎动物的快速GIT过境时间,对微生物组组成的趋同产生影响
bioRxiv : the preprint server for biology
|August 30, 2024
概括
飞行鸟类和蝙蝠的胃肠道 (GIT) 过境时间比无翼翼的脊椎动物更快. 这种快速过境,特别是在蝙蝠中,可能会影响它们独特的肠道微生物组合.
科学领域:
- 比较生理学比较生理学
- 微生物学 微生物学
- 进化生物学是进化的生物学.
背景情况:
- 飞行动物,包括鸟类和蝙蝠,拥有简化的胃肠道 (GIT),以帮助飞行.
- 以前的研究表明,鸟类的GIT过境时间缩短了,但这在蝙蝠中还没有得到全面研究.
- 蝙蝠肠道微生物组是不同的,由Pseudomonadota (以前的蛋白质细菌) 主导,类似于飞行鸟类.
研究的目的:
- 为了研究和比较脊椎动物之间的胃肠道过境时间,专注于飞行物种.
- 测试该假设,即快速的GIT过境时间有助于鸟类和蝙蝠的融合微生物组合.
- 探索蝙蝠体质量,GIT过境时间和蝙蝠体内的微生物组合之间的关系.
主要方法:
- 对已发表的脊椎动物胃肠道过境时间数据进行了元分析.
- 在飞行 (鸟类,蝙蝠) 和非飞行脊椎动物之间统计比较过境时间.
- 在Chiroptera (蝙蝠) 中的顺序内分析检查了体质和GIT过境时间之间的相关性.
主要成果:
- 蝙蝠和飞鸟的GIT过境时间比非飞行性脊椎动物要快得多.
- 在蝙蝠中,身体质量和GIT过境时间之间观察到负相关性 (较大的蝙蝠过境时间更快).
- 这种蝙蝠的反向质量转运关系与包括鸟类在内的其他脊椎动物所见的模式形成鲜明对比.
结论:
- 快速GIT过境是飞行脊椎动物的共同特征,可能推动融合肠道微生物组的进化.
- 蝙蝠体质和运输时间之间的反向关系可能受到饮食的影响,更大的水果/花蜜食者表现出更快的运输.
- 这些发现提供了关于飞行的生理适应及其对蝙蝠和鸟类肠道生态的影响的见解.
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