一个充满活力的生物群落,与食骨多叶动物属Osedax相关
Shana K Goffredi1, Balig Panossian2, Camille Brzechffa1
1Department of Biology, Occidental College , Los Angeles, California, USA.
mBio
|June 29, 2023
概括
这项为期14年的研究揭示了深海奥塞达克斯虫的外部细菌的动态变化,显示了鱼尸体分解时的Campylobacterales的生态继承. 这些生动物可能与Osedax共同进化,帮助它们独特的骨食生活方式.
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
- 这种共生是共生.
背景情况:
- 奥塞达克斯 (Osedax) 虫的宿主是用于骨消化的内共生细菌.
- 在Osedax树干上发现了外部细菌,但人们对其了解甚少.
- 深海生态系统,就像鱼布一样,拥有独特的共生关系.
研究的目的:
- 为了研究随着时间的推移,Osedax虫上的外部细菌群落的动态变化.
- 描述这些生物的组成和代谢潜力.
- 探索进化的历史和宿主细菌相互作用.
主要方法:
- 在沉没的鱼尸体上长度研究 (14年) 的Osedax标本.
- 在Osedax表皮上的细菌生虫的元基因组学分析.
- 对生物代谢能力和遗传元素的基因组分析.
主要成果:
- 在七种Osedax物种中观察到Campylobacterales生虫的动态,持久的转变.
- 细菌属 (Arcobacter,Sulfurospirillum,Sulfurimonas) 呈现出与鱼尸体分解阶段相关的连续模式.
- 生物基因组显示了代谢过渡的潜力 (异质变异到自身变异),并包含了基因交换和真核生物样蛋白质域的基因.
结论:
- 奥塞达克斯 (Osedax) 虫拥有一个连续的外部细菌群体,随着食物来源的退化而变化.
- 这些生动物似乎与奥塞达克斯有着漫长的共同进化历史,基因组特征表明了这一点.
- 这项研究强调了外部生虫在深海类动物生态中的重要,但被低估的作用.
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