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生态漂移是否解释了社会宿主物种中各个群体之间的微生物组合的变化?

Clémence Rose¹, Marie Braad Lund², Andreas Schramm²

¹Section for Genetic Ecology and Evolution, Department of Biology, Aarhus University, Aarhus, Denmark.

Journal of evolutionary biology

|September 30, 2023

概括

生态漂移驱动社会蜘蛛中的微生物群分歧. 较小的创始群体显示出更大的微生物群不相似性,这表明在群体形成过程中,随机过程塑造了与宿主相关的微生物群体.

科学领域:

生态生态学生态生态学
微生物学微生物学
进化生物学进化生物学

背景情况:

主体微生物组的组成在物种之间有很大差异.
社会互动可以使群体内的微生物群同质化,但群体之间存在分歧.
微生物组的变化源于决定性和随机的过程,包括生态漂移.

研究的目的:

调查群组形成期间的生态漂移是否会导致社会蜘蛛*Stegodyphus dumicola*中的微生物群分歧.
为了测试生态漂移随着小组规模的减少而增加的预测.
了解分散和新群体基础在塑造宿主微生物组中的作用.

主要方法:

模拟新的群体形成,将野外收集的蜘蛛巢分成1,3个和10个个体的群体.
在6周后使用16S rRNA基因测序分析了微生物组的组成.
在新形成的群体中和新形成的群体内比较微生物群的变化.

主要成果:

微生物组的组成在单个创始人中比在更大群体中的个人中更不相似,支持生态漂移假说.
从出生巢微生物组的分离主要是由非核心共生体的增加所驱动的.
与小组中的创始人相比,个人创始人拥有更高的非核心共生体的相对丰度,包括潜在的病原体.

结论:

宿主微生物组的随机分歧发生在个人创始人组建组的过程中.
生态漂移可以解释在自然种群中观察到的宿主微生物组组成的群体间变化.
群体的大小和动态对核心和非核心共生体的数量和组成有不同的影响.

关键词:

这种植物是Stegodyphus dumicola.16S rRNA amplicon 序列的测序方式细菌共生体是一种共生体.实验组组建组的形成.群体规模群体规模群体规模社会蜘蛛是社会蜘蛛.

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