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Impact of salinity on the gastrointestinal bacterial community of Theodoxus fluviatilis

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dc.contributor.authorKivistik, Carmen
dc.contributor.authorKnobloch, Jan
dc.contributor.authorKäiro, Kairi
dc.contributor.authorTammert, Helen
dc.contributor.authorKisand, Veljo
dc.contributor.authorHildebrandt, Jan-Peter
dc.contributor.authorHerlemann, Daniel P.
dc.contributor.departmentCentre for Limnology. Estonian University of Life Scienceseng
dc.date.accessioned2023-02-10T11:04:10Z
dc.date.available2023-02-10T11:04:10Z
dc.date.issued2020
dc.description.abstractDifferences in salinity are boundaries that act as barriers for the dispersal of most aquatic organisms. This creates distinctive biota in freshwater and brackish water (mesohaline) environments. To test how saline boundaries influence the diversity and composition of host-associated microbiota, we analyzed the microbiome within the digestive tract of Theodoxus fluviatilis, an organism able to cross the freshwater and mesohaline boundary. Alpha-diversity measures of the microbiome in freshwater and brackish water were not significantly different. However, the composition of the bacterial community within freshwater T. fluviatilis differed significantly compared with mesohaline T. fluviatilis and typical bacteria could be determined for the freshwater and the mesohaline digestive tract microbiome. An artificial increase in salinity surrounding these freshwater snails resulted in a strong change in the bacterial community and typical marine bacteria became more pronounced in the digestive tract microbiome of freshwater T. fluviatilis. However, the composition of the digestive tract microbiome in freshwater snails did not converge to that found within mesohaline snails. Within mesohaline snails, no cardinal change was found after either an increase or decrease in salinity. In all samples, Pseudomonas, Pirellula, Flavobacterium, Limnohabitans, and Acinetobacter were among the most abundant bacteria. These bacterial genera were largely unaffected by changes in environmental conditions. As permanent residents in T. fluviatilis, they may support the digestion of the algal food in the digestive tract. Our results show that freshwater and mesohaline water host-associated microbiomes respond differently to changes in salinity. Therefore, the salinization of coastal freshwater environments due to a rise in sea level can influence the gut microbiome and its functions with currently unknown consequences for, e.g., nutritional physiology of the host.eng
dc.description.abstractDH, CK, VK, KK, and HT were supported by the European Regional Development Fund/Estonian Research Council funded “Mobilitas Plus Top Researcher grant MOBTT24.” In addition, VK was supported by Estonian Research Council grant PUT1389. The project is also supported by the Baltic-German University Liaison Office and the German Academic Exchange Service (DAAD) with funds from the Foreign Office of the Federal Republic of Germany. Financial support was also provided by the German Research Foundation (DFG), RTG 2010.eng
dc.description.sponsorshipDH, CK, VK, KK, and HT were supported by the European Regional Development Fund/Estonian Research Council funded “Mobilitas Plus Top Researcher grant MOBTT24.” In addition, VK was supported by Estonian Research Council grant PUT1389. The project is also supported by the Baltic-German University Liaison Office and the German Academic Exchange Service (DAAD) with funds from the Foreign Office of the Federal Republic of Germany. Financial support was also provided by the German Research Foundation (DFG), RTG 2010.eng
dc.identifier.issn1664-302X
dc.identifier.publicationFrontiers in Microbiology, 2020, 11, Article 683eng
dc.identifier.urihttp://hdl.handle.net/10492/7967
dc.identifier.urihttps://doi.org/10.3389/fmicb.2020.00683
dc.publisherFrontiers
dc.rightsCreative Commons Attribution 4.0 International (CC BY 4.0) ; openAccesseng
dc.rights© 2020 Kivistik, Knobloch, Käiro, Tammert, Kisand, Hildebrandt and Herlemann.
dc.rights.urihttp://creativecommons.org/licenses/by/4.0
dc.subjectmicrobiomeeng
dc.subjectaquatic snaileng
dc.subjectbrackish water systemeng
dc.subject16S rRNAeng
dc.subjectplanctomyceteseng
dc.subjectarticleseng
dc.titleImpact of salinity on the gastrointestinal bacterial community of Theodoxus fluviatiliseng
dc.typeArticleeng

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