Consulta: creatorFacets:"Escalas, Arthur"
Registros recuperados: 6
Data/hora: 09/06/2024 08:26:56

Sustaining Rare Marine Microorganisms: Macroorganisms As Repositories and Dispersal Agents of Microbial Diversity
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: Troussellier, Marc; Escalas, Arthur; Bouvier, Thierry; Mouillot, David.
Recent analyses revealed that most of the biodiversity observed in marine microbial communities is represented by organisms with low abundance but, nonetheless essential for ecosystem dynamics and processes across both temporal and spatial scales. Surprisingly, few studies have considered the effect of macroorganism-microbe interactions on the ecology and distribution dynamics of rare microbial taxa. In this review, we synthesize several lines of evidence that these relationships cannot be neglected any longer. First, we provide empirical support that the microbiota of macroorganisms represents a significant part of marine bacterial biodiversity and that host-microbe interactions benefit to certain microbial populations which are part of the rare biosphere...
Tipo: Text
Palavras-chave: Microbial communities; Microbial biodiversity; Rare biosphere; Microbiota; Macroorganism-microbe interactions; Dispersal; Metacommunity; Gut microbiota.
Ano: 2017
URL: http://archimer.ifremer.fr/doc/00390/50123/50721.pdf

Drivers and ecological consequences of dominance in periurban phytoplankton communities using networks approaches
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

A unifying quantitative framework for exploring the multiple facets of microbial biodiversity across diverse scales
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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
Ano: 2013
URL: http://archimer.ifremer.fr/doc/00163/27441/25668.pdf

Microbial functional diversity: From concepts to applications
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Spatiotemporal variations in microbial diversity across the three domains of life in a tropical thalassohaline lake (Dziani Dzaha, Mayotte Island)
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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

Ecological Specialization Within a Carnivorous Fish Family Is Supported by a Herbivorous Microbiome Shaped by a Combination of Gut Traits and Specific Diet
Provedor de dados: Institutional Archive of Ifreme (ArchiMer)
Autores: 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