Mercury and Arctic Char Gill Microbiota Correlation in Canadian Arctic Communities
Arctic char is a top predator in Arctic waters and is threatened by mercury pollution in the context of changing climate. Gill microbiota is directly exposed to environmental xenobiotics and play a central role in immunity and fitness. Surprisingly, there is a lack of literature studying the effect...
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MDPI AG
2024-11-01
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| Series: | Microorganisms |
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| Online Access: | https://www.mdpi.com/2076-2607/12/12/2449 |
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| author | Flora Amill Patrice Couture Nicolas Derome |
| author_facet | Flora Amill Patrice Couture Nicolas Derome |
| author_sort | Flora Amill |
| collection | DOAJ |
| description | Arctic char is a top predator in Arctic waters and is threatened by mercury pollution in the context of changing climate. Gill microbiota is directly exposed to environmental xenobiotics and play a central role in immunity and fitness. Surprisingly, there is a lack of literature studying the effect of mercury on gill microbiota. To fill this knowledge gap, our primary goal was to measure to what extent gill exposure to mercury may alter gill microbiota activity in Arctic char. Specifically, we calculated the correlation between the taxonomic distribution of gill-associated bacterial symbiont activity and total mercury concentration in livers and muscles in wild populations of Arctic char in the Canadian Arctic. Our results showed that total mercury concentrations in tissues were higher in Ekaluktutiak (Nunavut) than in the other sites in Nunavik. Proteobacteria was the main phylum correlated to mercury concentration in both tissues, followed by Bacteroidetes and Cyanobacteria. In the most contaminated sites, <i>Aeromonas</i> and <i>Pseudomonas</i> (Proteobacteria) were predominant, while mercury concentration negatively correlated with <i>Photobacterium</i> (Proteobacteria) or <i>Cerasicoccus</i> (Verrucomicrobia). In summary, we found that mercury contamination correlates with active gill microbiota composition, with potential implications of strains in modulating mercury toxicity, making them interesting for future biomarker studies. |
| format | Article |
| id | doaj-art-a8bbc9a3ea8543c194eb55bd1adb3dab |
| institution | Kabale University |
| issn | 2076-2607 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | MDPI AG |
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| series | Microorganisms |
| spelling | doaj-art-a8bbc9a3ea8543c194eb55bd1adb3dab2024-12-27T14:41:12ZengMDPI AGMicroorganisms2076-26072024-11-011212244910.3390/microorganisms12122449Mercury and Arctic Char Gill Microbiota Correlation in Canadian Arctic CommunitiesFlora Amill0Patrice Couture1Nicolas Derome2Institute of Integrative and Systems Biology, Laval University, Quebec, QC G1V 0A6, CanadaCentre Eau Terre Environnement, Institut National de la Recherche Scientifique, 490 Rue de la Couronne, Quebec, QC G1K 9A9, CanadaInstitute of Integrative and Systems Biology, Laval University, Quebec, QC G1V 0A6, CanadaArctic char is a top predator in Arctic waters and is threatened by mercury pollution in the context of changing climate. Gill microbiota is directly exposed to environmental xenobiotics and play a central role in immunity and fitness. Surprisingly, there is a lack of literature studying the effect of mercury on gill microbiota. To fill this knowledge gap, our primary goal was to measure to what extent gill exposure to mercury may alter gill microbiota activity in Arctic char. Specifically, we calculated the correlation between the taxonomic distribution of gill-associated bacterial symbiont activity and total mercury concentration in livers and muscles in wild populations of Arctic char in the Canadian Arctic. Our results showed that total mercury concentrations in tissues were higher in Ekaluktutiak (Nunavut) than in the other sites in Nunavik. Proteobacteria was the main phylum correlated to mercury concentration in both tissues, followed by Bacteroidetes and Cyanobacteria. In the most contaminated sites, <i>Aeromonas</i> and <i>Pseudomonas</i> (Proteobacteria) were predominant, while mercury concentration negatively correlated with <i>Photobacterium</i> (Proteobacteria) or <i>Cerasicoccus</i> (Verrucomicrobia). In summary, we found that mercury contamination correlates with active gill microbiota composition, with potential implications of strains in modulating mercury toxicity, making them interesting for future biomarker studies.https://www.mdpi.com/2076-2607/12/12/2449Arctic chargill microbiota16s rRNA gene transcriptbacterial activitymercury contaminationCanadian Arctic |
| spellingShingle | Flora Amill Patrice Couture Nicolas Derome Mercury and Arctic Char Gill Microbiota Correlation in Canadian Arctic Communities Microorganisms Arctic char gill microbiota 16s rRNA gene transcript bacterial activity mercury contamination Canadian Arctic |
| title | Mercury and Arctic Char Gill Microbiota Correlation in Canadian Arctic Communities |
| title_full | Mercury and Arctic Char Gill Microbiota Correlation in Canadian Arctic Communities |
| title_fullStr | Mercury and Arctic Char Gill Microbiota Correlation in Canadian Arctic Communities |
| title_full_unstemmed | Mercury and Arctic Char Gill Microbiota Correlation in Canadian Arctic Communities |
| title_short | Mercury and Arctic Char Gill Microbiota Correlation in Canadian Arctic Communities |
| title_sort | mercury and arctic char gill microbiota correlation in canadian arctic communities |
| topic | Arctic char gill microbiota 16s rRNA gene transcript bacterial activity mercury contamination Canadian Arctic |
| url | https://www.mdpi.com/2076-2607/12/12/2449 |
| work_keys_str_mv | AT floraamill mercuryandarcticchargillmicrobiotacorrelationincanadianarcticcommunities AT patricecouture mercuryandarcticchargillmicrobiotacorrelationincanadianarcticcommunities AT nicolasderome mercuryandarcticchargillmicrobiotacorrelationincanadianarcticcommunities |