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| Escalas, Arthur; Bouvier, Thierry; Mouchet, Maud A.; Leprieur, Fabien; Bouvier, Corinne; Troussellier, Marc; Mouillot, David. |
| Recent developments of molecular tools have revolutionized our knowledge of microbial biodiversity by allowing detailed exploration of its different facets and generating unprecedented amount of data. One key issue with such large datasets is the development of diversity measures that cope with different data outputs and allow comparison of biodiversity across different scales. Diversity has indeed three components: local (), regional () and the overall difference between local communities (). Current measures of microbial diversity, derived from several approaches, provide complementary but different views. They only capture the component of diversity, compare communities in a pairwise way, consider all species as equivalent or lack a mathematically... |
| Tipo: Text |
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| Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00163/27441/25668.pdf |
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| Escalas, Arthur; Catherine, Arnaud; Maloufi, Selma; Cellamre, Maria; Hamlaoui, Sahima; Yepremian, Claude; Louvard, Clarisse; Trousselier, Marc; Bernard, Cécile. |
| Evaluating the causes and consequences of dominance by a limited number of taxa in phytoplankton communities is of huge importance in the current context of increasing anthropogenic pressures on natural ecosystems. This is of particular concern in densely populated urban areas where usages and impacts of human populations on water ecosystems are strongly interconnected. Microbial biodiversity is commonly used as a bioindicator of environmental quality and ecosystem functioning, but there are few studies at the regional scale that integrate the drivers of dominance in phytoplankton communities and their consequences on the structure and functioning of these communities. Here, we studied the causes and consequences of phytoplankton dominance in 50... |
| Tipo: Text |
Palavras-chave: Dominance; Phytoplankton; Co-occurrence network; Community cohesion; Community functioning; Periurban waterbodies. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00508/61962/66081.pdf |
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| Escalas, Arthur; Auguet, Jean-christophe; Avouac, Amandine; Seguin, Raphaël; Gradel, Antoine; Borrossi, Lucie; Villéger, Sébastien. |
| Animals have been developing key associations with micro-organisms through evolutionary processes and ecological diversification. Hence, in some host clades, phylogenetic distance between hosts is correlated to dissimilarity in microbiomes, a pattern called phylosymbiosis. Teleost fishes, despite being the most diverse and ancient group of vertebrates, have received little attention from the microbiome perspective and our understanding of its determinants is currently limited. In this study, we assessed the gut microbiome of 12 co-occurring species of teleost representing a large breadth of ecological diversity and originating from a single family (i.e., the Sparidae). We tested how host evolutionary history, diet composition and morphological traits are... |
| Tipo: Text |
Palavras-chave: Fish gut microbiome; Sparidae; Phylosymbiosis; Morphological traits; Diet; Herbivory; Ecological outlier. |
| Ano: 2021 |
URL: https://archimer.ifremer.fr/doc/00682/79408/81955.pdf |
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| Escalas, Arthur; Hale, Lauren; Voordeckers, James W.; Yang, Yunfeng; Firestone, Mary K.; Alvarez‐cohen, Lisa; Zhou, Jizhong. |
| Functional diversity is increasingly recognized by microbial ecologists as the essential link between biodiversity patterns and ecosystem functioning, determining the trophic relationships and interactions between microorganisms, their participation in biogeochemical cycles, and their responses to environmental changes. Consequently, its definition and quantification have practical and theoretical implications. In this opinion paper, we present a synthesis on the concept of microbial functional diversity from its definition to its application. Initially, we revisit to the original definition of functional diversity, highlighting two fundamental aspects, the ecological unit under study and the functional traits used to characterize it. Then, we discuss how... |
| Tipo: Text |
Palavras-chave: Functional diversity; Functional traits; Microbial communities; Theoretical frameworks of diversity; Trait-based ecology. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00584/69631/67487.pdf |
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| Hugoni, Mylene; Escalas, Arthur; Bernard, Cecile; Nicolas, Sebastien; Jezequel, Didier; Vazzoler, Fanny; Sarazin, Gerard; Leboulanger, Christophe; Bouvy, Marc; Got, Patrice; Ader, Magali; Troussellier, Marc; Agogue, Helene. |
| Thalassohaline ecosystems are hypersaline environments originating from seawater in which sodium chloride is the most abundant salt and the pH is alkaline. Studies focusing on microbial diversity in thalassohaline lakes are still scarce compared with those on athalassohaline lakes such as soda lakes that have no marine origin. In this work, we investigated multiple facets of bacterial, archaeal and eukaryotic diversity in the thalassohaline Lake Dziani Dzaha using a metabarcoding approach. We showed that bacterial and archaeal diversity were mainly affected by contrasting physicochemical conditions retrieved at different depths. While photosynthetic microorganisms were dominant in surface layers, chemotrophic phyla (Firmicutes or Bacteroidetes) and... |
| Tipo: Text |
Palavras-chave: Archaea; Bacteria; Eukaryotes; Extreme environment; Metabarcoding; Thalassohaline lake. |
| Ano: 2018 |
URL: https://archimer.ifremer.fr/doc/00464/57564/59738.pdf |
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