pH drop impacts differentially skin and gut microbiota of the Amazonian fish tambaqui (Colossoma macropomum)

Sylvain, François‐Étienne; Cheaib, Bachar; Llewellyn, Martin S.; Correia, Tiago Gabriel; Fagundes, Daniel Barros; Val, Adalberto Luı́s; Derôme, Nicolas

doi:10.1038/srep32032

Cited by 136 publications

(152 citation statements)

References 55 publications

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“…Water physicochemical parameters are known to be important drivers of free‐living (bacterioplankton) and host‐associated bacterial communities (Cheaib, Boulch, Mercier, & Derome, ; Giatsis et al, ; Sylvain et al, ). Our results concur, as they show a significant effect of environmental factors on the bacterial community structure of two different fish host species, which showed a similar response independently (Figures and ).…”

Section: Discussionmentioning

confidence: 99%

Amazon fish bacterial communities show structural convergence along widespread hydrochemical gradients

et al. 2019

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The world's richest freshwater fish community thrives in gradients of contrasting environments in Amazonia, ranging from ion‐poor acidic black waters, to ion‐rich circumneutral white waters. These hydrochemical gradients structure Amazonian fish assemblages via ecological speciation events. Fish bacterial communities contain an important genetic heritage essential for their hosts' survival and are also involved in adaptive divergence via niche adaptation processes, but the extent to which they evolve in response to hydrochemical gradients in Amazonia is unknown. Here we investigated bacterial communities (gut and skin mucus) of two ecologically and phylogenetically divergent host species (Mesonauta festivus and Serrasalmus rhombeus) distributed throughout these hydrochemical gradients. The goal was to characterize intra‐ and interspecific Amazonian fish microbiome variations across multiple scales. Using a 16S metabarcoding approach, we investigated the microbiota of 43 wild M. festivus, 32 S. rhombeus and seven water samples, collected at seven sampling sites encompassing both water colours. Taxonomical structures of bacterial communities from both host species were significantly correlated to the environmental continua of magnesium, sodium, dissolved organic carbon, calcium, dissolved O2, pH, potassium, hardness and chloride. Analysis of discriminating features in community structures across multiple scales demonstrated intra‐ and interspecific structural parallelisms in the response to the hydrochemical gradients. Together, these parallelisms suggest the action of selection on bacterial community structures along Amazonian hydrochemical gradients. Functional approaches along with reciprocal transplant experiments will provide further insights on the potential contribution of Amazonian fish microbiomes in host adaptation and ecological speciation events.

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Section: Discussionmentioning

confidence: 99%

Amazon fish bacterial communities show structural convergence along widespread hydrochemical gradients

et al. 2019

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“…Our observations are consistent with a recent study 10 , which documented a high abundance of Proteobacteria in the surrounding environment and in the gut microbiota of early stage zebrafish larvae. It is possible that the prevalence of Proteobacteria at the onset of gut microbiota ontogenesis is related to the opportunistic nature of several strains in this phylum 18, 23 that can colonize the gut in early development, when weak colonization resistance is offered by commensal gut symbionts 24 . This resistance increases later during development 23 , as the gut is colonized by a more specific microbiota.…”

Section: Discussionmentioning

confidence: 99%

“…This suggestion has never been investigated further since 1956. With the development of high throughput sequencing technologies, it is now well known that bacterial symbionts are abundant within fish skin mucus 18 . Thus, as discus fry feed on the cutaneous mucus of their parents, they inevitably ingest parental skin mucus bacteria, which are therefore vertically transmitted from the parents to the progeny.…”

Section: Introductionmentioning

confidence: 99%

Vertically and horizontally transmitted microbial symbionts shape the gut microbiota ontogenesis of a skin-mucus feeding discus fish progeny

Sylvain

Derôme

2017

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Fish gut microbial communities play key functions for their hosts, but their ontogenesis is poorly understood. Recent studies on the zebrafish suggest that gut symbionts are recruited naturally through horizontal transmission from environmental water. We used an alternative fish model, the discus (Symphysodon aequifasciata), to identify the main factors driving fish gut microbiota ontogenesis. The discus exhibits a unique parenting behavior: both discus parents vertically feed their fry with a cutaneous mucus secretion during three weeks post-hatching. We hypothesized that vertical microbial transmission via parental mucus feeding, along with horizontal transmission of environmental microbial symbionts, helps to shape the taxonomic structure of the discus fry gut microbiota. To assess this premise, we thoroughly documented the gut microbiota ontogenesis of a discus progeny during 100 days post-hatching. The V4 16S rRNA gene was sequenced to assess taxonomic structure of fry gut, parent mucus, and water samples. Our main results suggest that specific microbial symbionts both from the parents skin mucus and environmental water play important roles in shaping the structure of the fry gut microbiota.

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“…; Sylvain et al . ). In a world dominated by microorganisms, metazoans have had to evolve and form tactical associations with their unicellular neighbours in order to inhabit a wide array of niches and habitats (Rawls et al .…”

Section: Factors Influencing Fish Gut Microbiome Structurementioning

confidence: 97%

Fish intestinal microbiome: diversity and symbiosis unravelled by metagenomics

et al. 2017

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Summary The gut microbiome of vertebrates plays an integral role in host health by stimulating development of the immune system, aiding in nutrient acquisition and outcompeting opportunistic pathogens. Development of next‐generation sequencing technologies allows researchers to survey complex communities of microorganisms within the microbiome at great depth with minimal costs, resulting in a surge of studies investigating bacterial diversity of fishes. Many of these studies have focused on the microbial structure of economically significant aquaculture species with the goal of manipulating the microbes to increase feed efficiency and decrease disease susceptibility. The unravelling of intricate host–microbe symbioses and identification of core microbiome functions is essential to our ability to use the benefits of a healthy microbiome to our advantage in fish culture, as well as gain deeper understanding of bacterial roles in vertebrate health. This review aims to summarize the available knowledge on fish gastrointestinal communities obtained from metagenomics, including biases from sample processing, factors influencing assemblage structure, intestinal microbiology of important aquaculture species and description of the teleostean core microbiome.

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pH drop impacts differentially skin and gut microbiota of the Amazonian fish tambaqui (Colossoma macropomum)

Cited by 136 publications

References 55 publications

Amazon fish bacterial communities show structural convergence along widespread hydrochemical gradients

Amazon fish bacterial communities show structural convergence along widespread hydrochemical gradients

Vertically and horizontally transmitted microbial symbionts shape the gut microbiota ontogenesis of a skin-mucus feeding discus fish progeny

Fish intestinal microbiome: diversity and symbiosis unravelled by metagenomics

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