{"id":22653,"date":"2025-08-31T12:07:26","date_gmt":"2025-08-31T10:07:26","guid":{"rendered":"https:\/\/www.mio.osupytheas.fr\/?p=22653"},"modified":"2025-09-08T09:32:54","modified_gmt":"2025-09-08T07:32:54","slug":"james-bradley-cnrs-mio-meb-will-submit-his-hdr-on-monday-1-september-2025","status":"publish","type":"post","link":"https:\/\/www.mio.osupytheas.fr\/en\/james-bradley-cnrs-mio-meb-soutiendra-son-hdr-le-lundi-1er-septembre-2025\/","title":{"rendered":"Congratulations to James Bradley (CNRS - MIO MEB) who defended his HDR on Monday 1 September 2025."},"content":{"rendered":"
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On the theme :\u00a0Biosphere-geosphere interactions and microbial life in extreme environments<\/em><\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t

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Abstract<\/strong><\/h4>

Microorganisms occupy virtually all available environmental niches including those previously thought of as uninhabitable. My research aims to understand the interactions between microorganisms and their environment across diverse Earth systems - focussing on how microbial communities and their metabolisms are shaped by environmental factors (including energy limitation and nutrient availability), and how this affects the cycling of nutrients and energy within and across ecosystems. A significant portion of my research is focussed on 'extreme' and climatologically sensitive environments including glaciers, permafrost, the atmosphere, and marine sediments. My future research program will build knowledge and quantitative tools to challenge and advance the current understanding of microbial activity and dormancy in natural environments. Microorganisms use dormancy as a survival strategy to persist throughout unfavourable changes in their environment. However, we lack fundamental knowledge on the prevalence, triggers and timescales of dormancy, and how these factors affect ecosystems and elemental budgets. I will address this by applying and integrating new interdisciplinary modelling approaches with experimental tools to measure microbial activity and associated biogeochemical transformations across Earth systems including the cryosphere. Understanding the interplay between microbial dormancy, ecological processes and biogeochemical cycles holds the key to understanding the co-evolution of life and our planet, and how life excels throughout global environmental changes.<\/p>

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Members of the jury<\/strong><\/h4>
  • Thierry BOUVIER, UMR MARBEC<\/li>
  • Fran\u00e7oise BRINGEL, University of Strasbourg<\/li>
  • Karim BENZERARA, Sorbonne University<\/li>
  • Jury members:<\/li>
  • Val\u00e9rie MICHOTEY, Aix-Marseille University<\/li>
  • Graeme NICOL, University of Lyon<\/li>
  • Adrienne KISH, Mus\u00e9um National d'Histoire Naturelle, Paris<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

    Sur le th\u00e8me :\u00a0Biosphere-geosphere interactions and microbial life in extreme environments. R\u00e9sum\u00e9Microorganisms occupy virtually all available environmental niches including those previously thought of as uninhabitable. My research aims to understand […]<\/p>\n","protected":false},"author":319,"featured_media":23118,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[35,17,1],"tags":[],"class_list":["post-22653","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hdr","category-a-la-une","category-actualites"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/22653","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/users\/319"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/comments?post=22653"}],"version-history":[{"count":26,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/22653\/revisions"}],"predecessor-version":[{"id":23122,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/posts\/22653\/revisions\/23122"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media\/23118"}],"wp:attachment":[{"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/media?parent=22653"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/categories?post=22653"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mio.osupytheas.fr\/en\/wp-json\/wp\/v2\/tags?post=22653"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}