热水风口共生之间的生态差异可能会导致对比的共生物种群差异化模式
Corinna Breusing1, Yao Xiao2,3, Shelbi L Russell4
1Graduate School of Oceanography, University of Rhode Island , Narragansett, Rhode Island, USA.
mSystems
|July 26, 2023
概括
深海共生体比类共生体具有较少的地理结构,这表明息地的稳定性和混合性对微生物种群的影响较小. 这影响了我们对海洋环境中的共生体适应性的理解.
科学领域:
- 海洋生物学 海洋生物学
- 微生物生态学 微生物生态学
- 共生研究是对共生的研究.
背景情况:
- 微生物共生体的组成因宿主遗传,环境和地理而在地理上有所不同.
- 适应当地息地可以推动共生菌株的细分,但其对不同宿主-共生菌系统的基因组结构的影响尚不清楚.
研究的目的:
- 研究宿主-共生体关联中的生态差异如何影响共生体种群的基因组结构.
- 将深海中的共生物种群结构与具有对比生态的同时存在的类动物进行比较.
主要方法:
- 来自西太平洋水热喷口的深海 (Bathymodiolus septemdierum) 种群的测序元基因组.
- 分析了与地理位置和通风位特征相关的共生物种群结构.
- 与同时发生的类共生 (Alviniconcha和Ifremeria) 相比较的发现.
主要成果:
- 与B. septemdierum相关的共生动物种群显示出地理结构,但主导菌株与通风地点无关.
- 相比之下,胃类共生体表现出更大的营养依赖,并占据了更可变的息地.
- 贝类共生体在地理上没有那么分散,也没有显示出环境适应的证据.
结论:
- 息地的同质性,共生生物的分散和基因组混合可能会促进共生生物菌株在贝的不同位置的持久性.
- 贝类混合养可能会降低局部共生体适应的选择性压力.
- 这些发现阐明了在与生态利基对比的海洋共生中塑造共生物种群结构的机制.
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