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55th Anniversary of Ivan Barnes: Microbial Communities of Serpentinite-Hosted Ecosystems
Serpentinization is a reaction that involves the hydration of ferromagnesium minerals (e.g., olivine, pyroxenes), resulting in the production of hydrogen gas and reduced carbon compounds. This reaction also leads to the formation of mineral carbonates, and highly alkaline and reducing fluids. Microorganisms have adapted to such extremes and robust microbial communities were discovered at several locations, including the Mid-Atlantic Ridge, Mariana Forearc, the Cabeço de Vide Aquifer, the Cedars, the Coast Range Ophiolite Microbial Observatory, Hakuba Happo, the Samail ophiolite, the Voltri Massif, and the Zambales ophiolite. These locations represent a range of pressure and temperature conditions, demonstrating that serpentinization is a ubiquitous geologic process occurring at subduction zones, mid-ocean ridges, and passive margins. This process is also thought to have supported early life because of the availability of reduced products and the presence of geochemical disequilibria.
Biology of Archaea, Volume 1
Archaea constitute a new branch of life alongside bacteria and eukaryotes. These microorganisms are unique in their cellular and molecular aspects. They have evolutionary links with the first eukaryotic cells and are now being used to elucidate fundamental biological questions. Champions of extremophilicity, archaea are helping to lift the veil on the limits of life on Earth. Biology of Archaea 1 explores the discovery and evolution of the field of archaea research. This book also looks at the evolutionary history of archaea and their integration into the tree of life, and examines this complex and extremely diverse world in terms of their ecological niches and their still largely unexplored virosphere.
Thermophiles
We might think of them as living on the very edge of existence. Referred to as extremophiles, these microorganisms exhibit the most radical capacity for adaptation in those harsh environments that are just barely conducive to the existence of cellular life. Unlocking the mechanisms and understanding the evolutionary development that allows these si
Les archées, micro-organismes du troisième domaine du vivant 1
Les archées (ou Archaea) constituent un nouveau domaine du vivant au côté des bactéries et des eucaryotes. Ces micro-organismes sont uniques par leurs aspects cellulaires et moléculaires. Ils possèdent des liens évolutifs avec les premières cellules eucaryotes et sont désormais utilisés pour élucider des questions biologiques fondamentales. Championnes de l’extrêmophilie, les archées permettent de lever le voile sur les limites du vivant sur Terre. Les archées, micro-organismes du troisième domaine du vivant 1 présente la découverte et l’évolution du champ de recherche des archées. Il s’interroge sur leur histoire évolutive, leur intégration dans l’arbre du vivant et examine ce monde complexe et extrêmement diversifié au vu de leurs niches écologiques et de leur virosphère encore largement inexplorée.
Deep Carbon Science
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