James Bradley
@drbradbrad.bsky.social
Earth scientist 🌎
CNRS researcher / Chaire de Professeur Junior @ Mediterranean Institute of Oceanography, Marseille, France;
Geomicrobiology, Biogeoscience, Polar & extreme environments;
ERC StG #ERC_SIESTA;
My views; He/him; 🏳️🌈ally
www.jbradleylab.com
CNRS researcher / Chaire de Professeur Junior @ Mediterranean Institute of Oceanography, Marseille, France;
Geomicrobiology, Biogeoscience, Polar & extreme environments;
ERC StG #ERC_SIESTA;
My views; He/him; 🏳️🌈ally
www.jbradleylab.com
Pinned
What links Earth's depths with extraterrestrial life?
We share our ideas of
🦠 How the subsurface expands our view of habitability
🔬 Adaptations to expect elsewhere
🚢 How deep-bio sampling & technologies inform 🚀 missions
I 🤍 this illustration of how far we have(n't) probed Earth's vast depths 🔦
We share our ideas of
🦠 How the subsurface expands our view of habitability
🔬 Adaptations to expect elsewhere
🚢 How deep-bio sampling & technologies inform 🚀 missions
I 🤍 this illustration of how far we have(n't) probed Earth's vast depths 🔦
Pleasure working with @emilruff.bsky.social @geobiomaggie.bsky.social @melroselane.bsky.social & lead author @emvidal.bsky.social 👏
@mioceanologie.bsky.social @cnrs-insu.bsky.social @cnrs-dr12.bsky.social @erc.europa.eu @hfspo.bsky.social #ERC_SIESTA
@mioceanologie.bsky.social @cnrs-insu.bsky.social @cnrs-dr12.bsky.social @erc.europa.eu @hfspo.bsky.social #ERC_SIESTA
January 7, 2026 at 7:06 PM
What links Earth's depths with extraterrestrial life?
We share our ideas of
🦠 How the subsurface expands our view of habitability
🔬 Adaptations to expect elsewhere
🚢 How deep-bio sampling & technologies inform 🚀 missions
I 🤍 this illustration of how far we have(n't) probed Earth's vast depths 🔦
We share our ideas of
🦠 How the subsurface expands our view of habitability
🔬 Adaptations to expect elsewhere
🚢 How deep-bio sampling & technologies inform 🚀 missions
I 🤍 this illustration of how far we have(n't) probed Earth's vast depths 🔦
January 7, 2026 at 7:06 PM
What links Earth's depths with extraterrestrial life?
We share our ideas of
🦠 How the subsurface expands our view of habitability
🔬 Adaptations to expect elsewhere
🚢 How deep-bio sampling & technologies inform 🚀 missions
I 🤍 this illustration of how far we have(n't) probed Earth's vast depths 🔦
We share our ideas of
🦠 How the subsurface expands our view of habitability
🔬 Adaptations to expect elsewhere
🚢 How deep-bio sampling & technologies inform 🚀 missions
I 🤍 this illustration of how far we have(n't) probed Earth's vast depths 🔦
Reposted by James Bradley
🌏 Happy 🔭 New 🧪 Year 🦠 2026 ✨
If you feel like an easy read about subsurface microbiomes and astrobiology:
Here is an opinion I wrote with @emvidal.bsky.social @geobiomaggie.bsky.social @drbradbrad.bsky.social and Melody Lindsay
enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/...
If you feel like an easy read about subsurface microbiomes and astrobiology:
Here is an opinion I wrote with @emvidal.bsky.social @geobiomaggie.bsky.social @drbradbrad.bsky.social and Melody Lindsay
enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/...
Subsurface Life on Earth as a Key to Unlock Extraterrestrial Mysteries
This paper discusses current research on subsurface microbiology. Exploring Earth's deep and extreme subsurface environments provides critical insights into life's limits and adaptability. Subsurface...
enviromicro-journals.onlinelibrary.wiley.com
January 7, 2026 at 6:21 PM
🌏 Happy 🔭 New 🧪 Year 🦠 2026 ✨
If you feel like an easy read about subsurface microbiomes and astrobiology:
Here is an opinion I wrote with @emvidal.bsky.social @geobiomaggie.bsky.social @drbradbrad.bsky.social and Melody Lindsay
enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/...
If you feel like an easy read about subsurface microbiomes and astrobiology:
Here is an opinion I wrote with @emvidal.bsky.social @geobiomaggie.bsky.social @drbradbrad.bsky.social and Melody Lindsay
enviromicro-journals.onlinelibrary.wiley.com/doi/10.1111/...
3 weeks (half way!) into our #ERC_SIESTA field campaign in East Antarctica ❄️🐧 with @drmartinezrabert.bsky.social we're investigating #microbialdormancy in the #cryosphere 🧬🦠🔬 @cnr-isp.bsky.social XLI Italian Antarctic Expedition, Zucchelli Station, Victoria Land 🇦🇶🇮🇹🇪🇺 #POLARIN
January 7, 2026 at 7:01 AM
3 weeks (half way!) into our #ERC_SIESTA field campaign in East Antarctica ❄️🐧 with @drmartinezrabert.bsky.social we're investigating #microbialdormancy in the #cryosphere 🧬🦠🔬 @cnr-isp.bsky.social XLI Italian Antarctic Expedition, Zucchelli Station, Victoria Land 🇦🇶🇮🇹🇪🇺 #POLARIN
Reposted by James Bradley
This is find -dot- gif
Towards the middle of the century, ~4000 glaciers worldwide will disappear every year.
Towards the middle of the century, ~4000 glaciers worldwide will disappear every year.
Peak glacier extinction in the mid-twenty-first century - Nature Climate Change
Many mountain glaciers will disappear with warming. Here the authors assess how many glaciers will disappear per year under different warming scenarios, finding that a peak in glacier loss will happen...
www.nature.com
December 29, 2025 at 2:56 AM
This is find -dot- gif
Towards the middle of the century, ~4000 glaciers worldwide will disappear every year.
Towards the middle of the century, ~4000 glaciers worldwide will disappear every year.
Buon Natale from the Mario Zucchelli Station and the XLI Spedizione Italiana in Antarctica ❄️🐧🇦🇶
December 25, 2025 at 7:08 AM
Buon Natale from the Mario Zucchelli Station and the XLI Spedizione Italiana in Antarctica ❄️🐧🇦🇶
Reposted by James Bradley
Ancient metagenomics reveals subglacial microbiomes driven by oxygen availability www.biorxiv.org/content/10.6... #jcampubs
December 8, 2025 at 2:31 PM
Ancient metagenomics reveals subglacial microbiomes driven by oxygen availability www.biorxiv.org/content/10.6... #jcampubs
Hugely grateful to our collaborator Ricardo Godoi at the Federal University of Paraná (UFPR) in Curitiba, for working so hard to make this possible, and to our project partners, and the ATTO community for supporting our project! 🙏🌿🧬🔬
December 8, 2025 at 9:39 AM
Hugely grateful to our collaborator Ricardo Godoi at the Federal University of Paraná (UFPR) in Curitiba, for working so hard to make this possible, and to our project partners, and the ATTO community for supporting our project! 🙏🌿🧬🔬
Amazonas 🐆🐛🌴🇧🇷
We’re working at the ATTO - an atmospheric observatory 325m above the Amazon rainforest. Sampling the aeromicrobiome, far from major anthropogenic aerosol sources, above pristine tropical rainforest in the heart of the central Amazon 🦠🧬🔬⛅️
@hfspo.bsky.social @erc.europa.eu
We’re working at the ATTO - an atmospheric observatory 325m above the Amazon rainforest. Sampling the aeromicrobiome, far from major anthropogenic aerosol sources, above pristine tropical rainforest in the heart of the central Amazon 🦠🧬🔬⛅️
@hfspo.bsky.social @erc.europa.eu
December 8, 2025 at 9:39 AM
Amazonas 🐆🐛🌴🇧🇷
We’re working at the ATTO - an atmospheric observatory 325m above the Amazon rainforest. Sampling the aeromicrobiome, far from major anthropogenic aerosol sources, above pristine tropical rainforest in the heart of the central Amazon 🦠🧬🔬⛅️
@hfspo.bsky.social @erc.europa.eu
We’re working at the ATTO - an atmospheric observatory 325m above the Amazon rainforest. Sampling the aeromicrobiome, far from major anthropogenic aerosol sources, above pristine tropical rainforest in the heart of the central Amazon 🦠🧬🔬⛅️
@hfspo.bsky.social @erc.europa.eu
Reposted by James Bradley
The government can’t afford to clear up the gigantic waste mountain because it would have to pay millions of pounds to the government.
Environment Agency faces landfill tax bill worth millions to clear illegal waste
Exclusive: ‘extremely unhelpful’ policy seen as deterrent to clearing thousands of dump sites across England
www.theguardian.com
December 6, 2025 at 11:56 AM
The government can’t afford to clear up the gigantic waste mountain because it would have to pay millions of pounds to the government.
Merci @ibensens.bsky.social @normalesup.bsky.social
grateful to be invited & the opportunity to share our research & discuss #microbialdormancy #polarnight #deepbiosphere #aeromicrobiome #glacierecology #taraocean #survival #adaptationtoextremes #carboncycle @hfspo.bsky.social @erc.europa.eu 🧬🦠🔬❄️
grateful to be invited & the opportunity to share our research & discuss #microbialdormancy #polarnight #deepbiosphere #aeromicrobiome #glacierecology #taraocean #survival #adaptationtoextremes #carboncycle @hfspo.bsky.social @erc.europa.eu 🧬🦠🔬❄️
November 21, 2025 at 7:52 PM
Merci @ibensens.bsky.social @normalesup.bsky.social
grateful to be invited & the opportunity to share our research & discuss #microbialdormancy #polarnight #deepbiosphere #aeromicrobiome #glacierecology #taraocean #survival #adaptationtoextremes #carboncycle @hfspo.bsky.social @erc.europa.eu 🧬🦠🔬❄️
grateful to be invited & the opportunity to share our research & discuss #microbialdormancy #polarnight #deepbiosphere #aeromicrobiome #glacierecology #taraocean #survival #adaptationtoextremes #carboncycle @hfspo.bsky.social @erc.europa.eu 🧬🦠🔬❄️
Why should microbes frozen in ice snow air & soils matter for global climate policy? #COP30 ❄️🌍🧬
Laura Molares Moncayo in Belém representing our #ERC_SIESTA research, bringing early-career voices & engaging with delegates about why microbial processes in the cryosphere matter in climate negotiations
Laura Molares Moncayo in Belém representing our #ERC_SIESTA research, bringing early-career voices & engaging with delegates about why microbial processes in the cryosphere matter in climate negotiations
November 19, 2025 at 11:34 AM
Why should microbes frozen in ice snow air & soils matter for global climate policy? #COP30 ❄️🌍🧬
Laura Molares Moncayo in Belém representing our #ERC_SIESTA research, bringing early-career voices & engaging with delegates about why microbial processes in the cryosphere matter in climate negotiations
Laura Molares Moncayo in Belém representing our #ERC_SIESTA research, bringing early-career voices & engaging with delegates about why microbial processes in the cryosphere matter in climate negotiations
Happy Polar Pride y’all 🏳️🌈❄️🐧🐻❄️🇦🇶
#PolarPride is a declaration of commitment to support, unite and uplift LGBTQIA+ people & enhance diversity in #PolarScience 😎🏳️🌈❄️
#PolarPrideDay #PolarPride2026 #PolarPrideDay2026 #LGBTSTEMDay #LGBTQSTEMDay #DiversityInPolarScience #DiversityInUKPolarScience
#PolarPride is a declaration of commitment to support, unite and uplift LGBTQIA+ people & enhance diversity in #PolarScience 😎🏳️🌈❄️
#PolarPrideDay #PolarPride2026 #PolarPrideDay2026 #LGBTSTEMDay #LGBTQSTEMDay #DiversityInPolarScience #DiversityInUKPolarScience
November 18, 2025 at 10:43 AM
Happy Polar Pride y’all 🏳️🌈❄️🐧🐻❄️🇦🇶
#PolarPride is a declaration of commitment to support, unite and uplift LGBTQIA+ people & enhance diversity in #PolarScience 😎🏳️🌈❄️
#PolarPrideDay #PolarPride2026 #PolarPrideDay2026 #LGBTSTEMDay #LGBTQSTEMDay #DiversityInPolarScience #DiversityInUKPolarScience
#PolarPride is a declaration of commitment to support, unite and uplift LGBTQIA+ people & enhance diversity in #PolarScience 😎🏳️🌈❄️
#PolarPrideDay #PolarPride2026 #PolarPrideDay2026 #LGBTSTEMDay #LGBTQSTEMDay #DiversityInPolarScience #DiversityInUKPolarScience
Reposted by James Bradley
Soutenance|🔴 Laurina Oms @mioceanologie.bsky.social soutiendra sa thèse sur le sujet : Effet des fronts de fine-échelles sur les communautés phytoplanctoniques en région oligotrophe.
📅 20 novembre 2025 à 14h00
🏚️ Amphithéâtre OCEANOMED - Bâtiment Méditerranée - Campus de Luminy
➡️ lnkd.in/eeja2FfF
📅 20 novembre 2025 à 14h00
🏚️ Amphithéâtre OCEANOMED - Bâtiment Méditerranée - Campus de Luminy
➡️ lnkd.in/eeja2FfF
November 12, 2025 at 8:05 AM
Soutenance|🔴 Laurina Oms @mioceanologie.bsky.social soutiendra sa thèse sur le sujet : Effet des fronts de fine-échelles sur les communautés phytoplanctoniques en région oligotrophe.
📅 20 novembre 2025 à 14h00
🏚️ Amphithéâtre OCEANOMED - Bâtiment Méditerranée - Campus de Luminy
➡️ lnkd.in/eeja2FfF
📅 20 novembre 2025 à 14h00
🏚️ Amphithéâtre OCEANOMED - Bâtiment Méditerranée - Campus de Luminy
➡️ lnkd.in/eeja2FfF
And honestly, the importance & implications of this work can’t be overstated
So will someone please fund us?!
@matehg.bsky.social, Marc, Shamik and I have been working tirelessly to secure funding to explore this important knowledge gap
If you’re asked to review our next proposal, please be kind!
So will someone please fund us?!
@matehg.bsky.social, Marc, Shamik and I have been working tirelessly to secure funding to explore this important knowledge gap
If you’re asked to review our next proposal, please be kind!
November 6, 2025 at 2:39 PM
And honestly, the importance & implications of this work can’t be overstated
So will someone please fund us?!
@matehg.bsky.social, Marc, Shamik and I have been working tirelessly to secure funding to explore this important knowledge gap
If you’re asked to review our next proposal, please be kind!
So will someone please fund us?!
@matehg.bsky.social, Marc, Shamik and I have been working tirelessly to secure funding to explore this important knowledge gap
If you’re asked to review our next proposal, please be kind!
Such a delight working w. @matehg.bsky.social Shamik Roy & Marc Dumont
We’ve started digging into these interactions, in the field and in the lab, thanks to small consumables budgets, studentships and fieldwork grants. But this only scratches the surface of what’s needed
We’ve started digging into these interactions, in the field and in the lab, thanks to small consumables budgets, studentships and fieldwork grants. But this only scratches the surface of what’s needed
November 6, 2025 at 2:39 PM
Such a delight working w. @matehg.bsky.social Shamik Roy & Marc Dumont
We’ve started digging into these interactions, in the field and in the lab, thanks to small consumables budgets, studentships and fieldwork grants. But this only scratches the surface of what’s needed
We’ve started digging into these interactions, in the field and in the lab, thanks to small consumables budgets, studentships and fieldwork grants. But this only scratches the surface of what’s needed
Why this matters:
Soils store more carbon than the atmosphere and vegetation combined 🌲⛅
Even small reductions in microbial CUE could weaken soils as carbon sinks 🦠
This adds a biological feedback to climate change that is overlooked in carbon-cycle models 📈
Soils store more carbon than the atmosphere and vegetation combined 🌲⛅
Even small reductions in microbial CUE could weaken soils as carbon sinks 🦠
This adds a biological feedback to climate change that is overlooked in carbon-cycle models 📈
November 6, 2025 at 2:39 PM
Why this matters:
Soils store more carbon than the atmosphere and vegetation combined 🌲⛅
Even small reductions in microbial CUE could weaken soils as carbon sinks 🦠
This adds a biological feedback to climate change that is overlooked in carbon-cycle models 📈
Soils store more carbon than the atmosphere and vegetation combined 🌲⛅
Even small reductions in microbial CUE could weaken soils as carbon sinks 🦠
This adds a biological feedback to climate change that is overlooked in carbon-cycle models 📈
We think that when soil microbes are exposed to antimicrobial compounds & warming, they may allocate more carbon to defence and maintenance, than to growth 🦠
This lowers their carbon-use efficiency, meaning more carbon is respired as CO₂ & less is retained in biomass and stored in the soil 🌱
This lowers their carbon-use efficiency, meaning more carbon is respired as CO₂ & less is retained in biomass and stored in the soil 🌱
November 6, 2025 at 2:39 PM
We think that when soil microbes are exposed to antimicrobial compounds & warming, they may allocate more carbon to defence and maintenance, than to growth 🦠
This lowers their carbon-use efficiency, meaning more carbon is respired as CO₂ & less is retained in biomass and stored in the soil 🌱
This lowers their carbon-use efficiency, meaning more carbon is respired as CO₂ & less is retained in biomass and stored in the soil 🌱
Soils worldwide are warming - fastest in the Arctic 🐻❄️ where vast amounts of Earth’s carbon is stored 🌡️
Simultaneously, global antibiotic use is rising 💉 and antimicrobial compounds are increasingly leaking into natural environments 💊
What does this mean for the microbes controlling soil carbon? 🦠
Simultaneously, global antibiotic use is rising 💉 and antimicrobial compounds are increasingly leaking into natural environments 💊
What does this mean for the microbes controlling soil carbon? 🦠
November 6, 2025 at 2:39 PM
Soils worldwide are warming - fastest in the Arctic 🐻❄️ where vast amounts of Earth’s carbon is stored 🌡️
Simultaneously, global antibiotic use is rising 💉 and antimicrobial compounds are increasingly leaking into natural environments 💊
What does this mean for the microbes controlling soil carbon? 🦠
Simultaneously, global antibiotic use is rising 💉 and antimicrobial compounds are increasingly leaking into natural environments 💊
What does this mean for the microbes controlling soil carbon? 🦠
Could rising antimicrobial activity in warmer soils make microbes less efficient at using carbon & push more CO₂ into the atmosphere?
🦠📈💊
Our new work in @isme-microbes.bsky.social explores how the combined effects of warming & AMR may alter microbial C processing
🧵👇
academic.oup.com/ismej/articl...
🦠📈💊
Our new work in @isme-microbes.bsky.social explores how the combined effects of warming & AMR may alter microbial C processing
🧵👇
academic.oup.com/ismej/articl...
Microbial interactions between climate warming and antimicrobial resistance threaten soil carbon storage and global health
Abstract. Anthropogenic activities are impacting the environment in ways that may intersect and have compounding effects. In soil, the spread of antibiotic
academic.oup.com
November 6, 2025 at 2:39 PM
Could rising antimicrobial activity in warmer soils make microbes less efficient at using carbon & push more CO₂ into the atmosphere?
🦠📈💊
Our new work in @isme-microbes.bsky.social explores how the combined effects of warming & AMR may alter microbial C processing
🧵👇
academic.oup.com/ismej/articl...
🦠📈💊
Our new work in @isme-microbes.bsky.social explores how the combined effects of warming & AMR may alter microbial C processing
🧵👇
academic.oup.com/ismej/articl...
A real pleasure to give an invited talk at the 8th International Symposium on Arctic Research in Hachioji, Tokyo 🇯🇵 on @hfspo.bsky.social @erc.europa.eu #ERC_SIESTA research exploring glacier & atmosphere microbiome connectivity @mioceanologie.bsky.social @cnrs-insu.bsky.social ❄️🦠☁️🧬
October 30, 2025 at 3:53 AM
A real pleasure to give an invited talk at the 8th International Symposium on Arctic Research in Hachioji, Tokyo 🇯🇵 on @hfspo.bsky.social @erc.europa.eu #ERC_SIESTA research exploring glacier & atmosphere microbiome connectivity @mioceanologie.bsky.social @cnrs-insu.bsky.social ❄️🦠☁️🧬