Diversity and Prospection of South Atlantic Ocean Microorganisms

Silva, Marcus Adonai Castro da; Lima, André Oliveira de Souza

doi:10.1007/978-3-319-55804-2_6

Cited by 4 publications

(2 citation statements)

References 103 publications

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“…In this study we focused on characterizing doliolid‐associated microbiomes and the ecosystem components (seawater and faecal pellets) that they directly interact with. Characterization of doliolid microbial communities using a 16S rRNA targeted metabarcoding approach indicates that at the highest taxonomic levels, doliolid‐associated bacterial communities are characteristic of marine bacterioplankton communities around the globe (Coutinho et al, 2021; Schauer et al, 2003; Silva et al, 2017; Yilmaz et al, 2015). Doliolid associated bacterial communities were dominated by Gammaproteobacteria (avg 35.1 ± 23.5%), Alphaproteobacteria (avg 26.6 ± 14.5%), Cyanobacteria (avg 16.3 ± 17.3%), Planctomycetes (avg 9.5 ± 11.7%), Bacteroidia (avg 6.3 ± 6.1%), and Phycisphaerae (avg 1.9 ± 2.9%) (Figures 4, 5, 7; Figure S3, Appendix S2).…”

Section: Discussionmentioning

confidence: 99%

The microbiome of the pelagic tunicate Dolioletta gegenbauri: A potential link between the grazing and microbial food web

et al. 2022

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Bloom‐forming gelatinous zooplankton occur circumglobally and significantly influence the structure of pelagic marine food webs and biogeochemical cycling through interactions with microbial communities. During bloom conditions especially, gelatinous zooplankton are keystone taxa that help determine the fate of primary production, nutrient remineralization, and carbon export. Using the pelagic tunicate Dolioletta gegenbauri as a model system for gelatinous zooplankton, we carried out a laboratory‐based feeding experiment to investigate the potential ecosystem impacts of doliolid gut microbiomes and microbial communities associated with doliolid faecal pellets and the surrounding seawater. Metabarcoding targeting Bacteria and Archaea 16S rRNA genes/Archaea) and qPCR approaches were used to characterize microbiome assemblages. Comparison between sample types revealed distinct patterns in microbial diversity and biomass that were replicable across experiments. These observations support the hypothesis that through their presence and trophic activity, doliolids influence the structure of pelagic food webs and biogeochemical cycling in subtropical continental shelf systems where tunicate blooms are common. Bacteria associated with starved doliolids (representative of the resident gut microbiome) possessed distinct low‐biomass and low‐diversity microbial assemblages, suggesting that the doliolid microbiome is optimized to support a detrital trophic mode. Bacterial genera Pseudoalteromomas and Shimia were the most abundant potential core microbiome taxa, similar to patterns observed in other marine invertebrates. Exploratory bioinformatic analyses of predicted functional genes suggest that doliolids, via their interactions with bacterial communities, may affect important biogeochemical processes including nitrogen, sulphur, and organic matter cycling.

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Section: Discussionmentioning

confidence: 99%

The microbiome of the pelagic tunicate Dolioletta gegenbauri: A potential link between the grazing and microbial food web

et al. 2022

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“…In this study we focused on characterizing doliolid-associated microbiomes and ecosystem components (seawater and fecal pellets) that they directly interact with. Characterization of doliolid microbial communities using a 16S rRNA targeted metabarcoding approach indicates that at the highest taxonomic levels, doliolid-associated bacterial communities are characteristic of marine bacterioplankton communities around the globe (Coutinho et al, 2021;Schauer et al, 2003;Silva et al, 2017;Yilmaz et al, 2015). Doliolid associated bacterial communities were dominated by Gammaproteobacteria (avg 35.1±23.5%), Alphaproteobacteria (avg 26.6±14.5%), Cyanobacteria (avg 16.3±17.3%), Planctomycetes (avg 9.5±11.7%), Bacteroidia (avg 6.3±6.1%), and Phycisphaerae (avg 1.9±2.9%) (Figs.…”

Section: Discussionmentioning

confidence: 99%

The microbiome of the pelagic tunicate Dolioletta gegenbauri: a potential link between the grazing and microbiala

Pereira¹,

Walters

El-Shaffey

et al. 2022

Preprint

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Bloom-forming marine gelatinous zooplankton, including the pelagic tunicate Dolioletta gegenbauri, occur circumglobally and have the potential to significantly influence the structure of pelagic marine food webs and biogeochemical cycling through interactions with microbial communities. Using targeted metabarcoding (16S rRNA genes recovering Bacteria/Archaea) and qPCR approaches associated with laboratory-based feeding experiments, we characterized patterns in doliolid gut microbiomes and microbial communities associated with doliolid fecal pellets and the surrounding seawater. The characterization of starved doliolids provides the first description of the doliolid gut microbiome. At the highest taxonomic levels, doliolid-associated bacterial communities are characteristic of marine bacterioplankton communities around the globe and were dominated by representatives of six major bacterial groups including Gammaproteobacteria, Alphaproteobacteria, Cyanobacteria, Planctomycetes, Bacteroidia and, Phycisphaerae. Comparison between sample types, however, revealed distinct patterns in diversity and biomass supporting the hypothesis that through their presence and trophic activity, doliolids influence the structure of pelagic food webs and biogeochemical cycling in subtropical continental shelf systems where doliolid blooms are common. Bacteria associated with starved doliolids (representative of the resident doliolid gut microbiome) possessed distinct communities, supporting the hypothesis that doliolids possess a unique but low diversity, low biomass microbiome optimized to support a detrital trophic mode. Among potential core microbiome taxa, the genera Pseudoalteromomas and Shimia were the most abundant, similar to patterns observed in other marine invertebrates. Exploratory bioinformatic analyses of predicted functional genes suggest that doliolids, via their interactions with bacterial communities, may affect important biogeochemical processes including nitrogen, sulfur, and organic matter cycling.

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Carotenoids produced by the deep-sea bacterium Erythrobacter citreus LAMA 915: detection and proposal of their biosynthetic pathway

et al. 2021

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Diversity and Prospection of South Atlantic Ocean Microorganisms

Cited by 4 publications

References 103 publications

The microbiome of the pelagic tunicate Dolioletta gegenbauri: A potential link between the grazing and microbial food web

The microbiome of the pelagic tunicate Dolioletta gegenbauri: A potential link between the grazing and microbial food web

The microbiome of the pelagic tunicate Dolioletta gegenbauri: a potential link between the grazing and microbiala

Carotenoids produced by the deep-sea bacterium Erythrobacter citreus LAMA 915: detection and proposal of their biosynthetic pathway

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