西南大西洋珊瑚的微生物组的组成和节奏变化
I G L Seiblitz1,2, K C C Capel3,4,5, R R Oliveira6
1Center for Marine Biology, University of São Paulo, São Sebastião, SP, 11602-109, Brazil. isaseiblitz@gmail.com.
Environmental microbiome
|June 13, 2025
概括
珊瑚微生物组表现出明显的昼夜模式,动物甲虫和动物甲虫物种表现出不同的群体. 在24小时内,很少发生显著的微生物变化,这表明短期的宿主微生物群适应性有限.
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
- 珊瑚礁科学 珊瑚礁科学
背景情况:
- 潮和潮节奏影响生物体生理学和微生物群落.
- 珊瑚拥有多样化的微生物群,在不同尺度上有所不同.
- 动物藻类珊瑚表现出极大的氧气变化,可能会影响它们的微生物群.
研究的目的:
- 为了研究珊瑚微生物群中的每日波动.
- 为了在72小时内比较zooxanthellate和azooxanthellate珊瑚物种中的微生物群落.
主要方法:
- 在72小时内对四种珊瑚物种 (两种动物甲,两种动物甲) 进行现场监测.
- 在AMPLICON序列变异 (ASV) 层面上分析微生物群落组成和丰度.
- 统计分析以确定白天和夜晚之间的显著差异和波动.
主要成果:
- 对所有物种来说,白天和夜晚之间的α多样性是相似的; Ma. 德卡克蒂斯的多样性最高.
- 微生物组组成在物种内白天和夜晚之间没有显著波动,但物种之间存在显著差异.
- 在特定的ASV (伪变种,Woeseia) 中观察到节奏性,DESeq2确定了13个ASV,其日夜丰度不同.
结论:
- 动物甲和动物甲珊瑚有不同的微生物群落.
- 在24小时周期内检测到很少有显著的微生物组变化.
- 未来的研究应该探索代谢途径,以了解微生物群对环境变化的短期适应.
相关概念视频
01:27Diversity of Protists III
Rhizaria are a diverse group of unicellular protists characterized by their threadlike cytoplasmic extensions known as pseudopodia. These structures aid in both locomotion and feeding, giving Rhizaria an amoeboid appearance. Their amoeboid morphology once led to taxonomic confusion, but molecular phylogenetics has clarified their evolutionary placement and emphasized their shared use of pseudopodia despite divergent lineages.This clade comprises diverse lineages such as Chlorarachniophyta,...
01:27Diversity of Protists IV
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
01:30Marine Microbial Ecology
Marine microbial ecosystems are shaped by distinct physicochemical limits, including high salinity, low nutrient availability, and fluctuating oxygen levels. These conditions favor smaller microbial cell sizes, which maximize their surface-to-volume ratio for efficient nutrient uptake.Microbial activity and community composition are closely linked to biogeochemical cycles, particularly in dynamic environments like estuaries, where halotolerant microbes thrive in response to variable salinity...
01:18Deep Sea Microbial Ecology
The deep ocean and its underlying sediments represent vast, largely unexplored microbial habitats that extend far beyond the sunlit photic zone. The photic (euphotic) zone typically spans the upper ~100–200 meters of pelagic waters in the open ocean, but its depth varies geographically and seasonally, where sufficient light supports photosynthetic life. Below this lies the deep sea, spanning roughly 1000–6000 meters (bathypelagic to abyssal zones), with deeper hadal trenches extending beyond...
01:27Microbiota of the Stomach and Small Intestine
The human gastrointestinal (GI) tract is characterized by distinct physicochemical conditions that shape its microbial communities. Among these, the stomach presents a particularly challenging environment for microbial colonization due to its highly acidic pH, ranging from 1 to 3. This extreme acidity effectively limits microbial density. However, certain acid-tolerant microorganisms are capable of surviving in this niche. Notably, Helicobacter pylori can colonize the gastric mucosa,...
01:27Microbiota of the Large Intestine
The large intestine hosts the most densely populated microbial ecosystem in the human body. This complex community primarily consists of anaerobic bacteria, with Bacillota (formerly Firmicutes) and Bacteroidota (formerly Bacteroidetes) as the predominant groups. The distribution of these microbes varies along different sections of the large intestine, influenced by local environmental factors such as oxygen availability and nutrient composition.The cecum, located at the beginning of the large...