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Codiversification of gastrointestinal microbiota and phylogeny in passerines is not explained by ecological divergence

L. Kropáčková, M. Těšický, T. Albrecht, J. Kubovčiak, D. Čížková, O. Tomášek, JF. Martin, L. Bobek, T. Králová, P. Procházka, J. Kreisinger,

. 2017 ; 26 (19) : 5292-5304. [pub] 20170511

Jazyk angličtina Země Velká Británie

Typ dokumentu časopisecké články

Perzistentní odkaz   https://www.medvik.cz/link/bmc18016667

Vertebrate gut microbiota (GM) is comprised of a taxonomically diverse consortium of symbiotic and commensal microorganisms that have a pronounced effect on host physiology, immune system function and health status. Despite much research on interactions between hosts and their GM, the factors affecting inter- and intraspecific GM variation in wild populations are still poorly known. We analysed data on faecal microbiota composition in 51 passerine species (319 individuals) using Illumina MiSeq sequencing of bacterial 16S rRNA (V3-V4 variable region). Despite pronounced interindividual variation, GM composition exhibited significant differences at the interspecific level, accounting for approximately 20%-30% of total GM variation. We also observed a significant correlation between GM composition divergence and host's phylogenetic divergence, with strength of correlation higher than that of GM vs. ecological or life history traits and geographic variation. The effect of host's phylogeny on GM composition was significant, even after statistical control for these confounding factors. Hence, our data do not support codiversification of GM and passerine phylogeny solely as a by-product of their ecological divergence. Furthermore, our findings do not support that GM vs. host's phylogeny codiversification is driven primarily through trans-generational GM transfer as the GM vs. phylogeny correlation does not increase with higher sequence similarity used when delimiting operational taxonomic units. Instead, we hypothesize that the GM vs. phylogeny correlation may arise as a consequence of interspecific divergence of genes that directly or indirectly modulate composition of GM.

Citace poskytuje Crossref.org

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$a Vertebrate gut microbiota (GM) is comprised of a taxonomically diverse consortium of symbiotic and commensal microorganisms that have a pronounced effect on host physiology, immune system function and health status. Despite much research on interactions between hosts and their GM, the factors affecting inter- and intraspecific GM variation in wild populations are still poorly known. We analysed data on faecal microbiota composition in 51 passerine species (319 individuals) using Illumina MiSeq sequencing of bacterial 16S rRNA (V3-V4 variable region). Despite pronounced interindividual variation, GM composition exhibited significant differences at the interspecific level, accounting for approximately 20%-30% of total GM variation. We also observed a significant correlation between GM composition divergence and host's phylogenetic divergence, with strength of correlation higher than that of GM vs. ecological or life history traits and geographic variation. The effect of host's phylogeny on GM composition was significant, even after statistical control for these confounding factors. Hence, our data do not support codiversification of GM and passerine phylogeny solely as a by-product of their ecological divergence. Furthermore, our findings do not support that GM vs. host's phylogeny codiversification is driven primarily through trans-generational GM transfer as the GM vs. phylogeny correlation does not increase with higher sequence similarity used when delimiting operational taxonomic units. Instead, we hypothesize that the GM vs. phylogeny correlation may arise as a consequence of interspecific divergence of genes that directly or indirectly modulate composition of GM.
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$a Těšický, Martin $u Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic.
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$a Albrecht, Tomáš $u Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic. Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic.
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$a Kubovčiak, Jan $u Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic.
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$a Čížková, Dagmar $u Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic.
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$a Tomášek, Oldřich $u Department of Zoology, Faculty of Science, Charles University, Prague, Czech Republic. Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic.
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$a Martin, Jean-François $u Montpellier-SupAgro, UMR CBGP, Montferrier-sur-Lez, France.
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$a Bobek, Lukáš $u Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic.
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$a Králová, Tereza $u Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic.
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$a Procházka, Petr $u Institute of Vertebrate Biology, Czech Academy of Sciences, Brno, Czech Republic.
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