Repeated selective enrichment process of sediment microbiota occurred in sea cucumber guts

Yohei Yamazaki, Yuichi Sakai, Sayaka Mino, Wataru Suda, Masahira Hattori, Pedro Milet Meirelles, Fabiano Thompson, Tomoo Sawabe

研究成果: Article

抄録

Deposit-feeding sea cucumbers repeat ingestion of sediments and excretion of faeces daily and consequently increase bacterial abundance in sediments and promote organic matter mineralization. Such ecological roles are expected to be collaborative activities of sea cucumbers and the gut microbiota. Here, we performed a spatiotemporally broad 16S rRNA gene analysis using 109 samples from sea cucumber faeces and habitat sediments to explore potential contribution of their gut microbiota to the ecological roles. Most operational taxonomic units (OTUs) observed in the faecal samples were shared with the sediment samples, nevertheless faecal and sediment microbiota differed from each other in UniFrac analysis. Lower bacterial diversity and increased relative abundance of specific OTUs in the faecal microbiota strongly suggest selective enrichment of ingested sediment microbiota in their guts. Interestingly, representative faecal OTUs were more abundant in sea cucumber-populated sediments than in un-inhabited sediments, indicating bacteria selectively enriched in the guts were spread on ambient sediments via faeces. Moreover, the predicted microbial community metabolic potential showed a higher abundance of genes related to carbohydrate and xenobiotics metabolisms in faeces than in sediments. Our study suggests the repeated selective enrichment transforms ambient sediment microbial communities and maintains the host's ecological roles by promoting organic matter mineralization.

元の言語English
ジャーナルEnvironmental Microbiology Reports
DOI
出版物ステータスAccepted/In press - 2019 1 1

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Sea Cucumbers
Holothuroidea
Microbiota
Feces
digestive system
sediments
sediment
feces
Carbohydrate Metabolism
intestinal microorganisms
Xenobiotics
rRNA Genes
Ecosystem
Eating
Bacteria
microbial communities
microbial community
mineralization
microbiome
sea

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Agricultural and Biological Sciences (miscellaneous)

これを引用

Repeated selective enrichment process of sediment microbiota occurred in sea cucumber guts. / Yamazaki, Yohei; Sakai, Yuichi; Mino, Sayaka; Suda, Wataru; Hattori, Masahira; Meirelles, Pedro Milet; Thompson, Fabiano; Sawabe, Tomoo.

:: Environmental Microbiology Reports, 01.01.2019.

研究成果: Article

Yamazaki, Yohei ; Sakai, Yuichi ; Mino, Sayaka ; Suda, Wataru ; Hattori, Masahira ; Meirelles, Pedro Milet ; Thompson, Fabiano ; Sawabe, Tomoo. / Repeated selective enrichment process of sediment microbiota occurred in sea cucumber guts. :: Environmental Microbiology Reports. 2019.
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AU - Meirelles, Pedro Milet

AU - Thompson, Fabiano

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