Samuel Abiven

#TREC_meets_Ecotron day 1
To kick off, we are organizing a workshop with about 60 partners to brainstorm about how TREC can go for freshwater and terrestrial systems, hosted at Fontainebleau @minesparis-psl.bsky.social Campus, coupled with a tour of CEREEP - Ecotron IDF facilities.

I am personally so glad this long-planned event finally takes place! @normalesup.bsky.social @cnrsecologie.bsky.social

Thanks to the huge commitment and efforts of both partners, we planned a fantastic program including a field campaign, ecotron experiments, meetings, public events, teaching, and institutional visits, to cite a few.

Today marks the start of an intense and exciting event, #TREC_meets_Ecotron. Over the next month #CEREEP-EcotronIdF hosts @embltrec.bsky.social scientific expedition teams (field, mobile labs, science and logistics, public communications, etc.) for multiple collaborative efforts.

NUTRIBOR: Unraveling Boron Isotope Dynamics to Diagnose Forest Nutritional Stress The NUTRIBOR project addresses a critical gap in our understanding of tree mineral nutrition under global change by leveraging non-traditional boron stable isotopes (δ¹¹B) as tracers of geo- versus…

More about this project here: www.samuelabiven.org/projects/nut...

The project proposes using stable boron isotopes (δ¹¹B) as tracers of geological and biological nutrient sources. It seeks to quantify how environmental stress like drought, soil depletion, and climate change alter nutrient pathways and leave isotopic signatures in soil, plant, and watersheds.

News from CEREEP Ecotron (2/15)

The eucalyptus trees for the NUTRIBOR project (#ANR, IPGP, University of Strasbourg, CIRAD, University of Saclay, @geosciences.bsky.social ) have arrived!

We are simulating Archæan conditions inside a reaction tube. By combining ancestral‐type microorganisms from the depths of Lake Pavin with Archean‐analog rocks from northern Canada, we are testing for signs of alteration, in preparation for a much larger experiment in the coming weeks.

Some news about what's going at our research station (1/15) @cnrsecologie.bsky.social @normalesup.bsky.social.
In the ERC-funded Pandora project (Nicolas Coltice, Naida Sakadjian’s PhD), we are trying to reproduce interactions between rocks & microbes when life emerged, around 4 billion years ago.

New paper : "The nature of soil blue carbon varies
across mangrove geomorphic settings" in www.nature.com/articles/s43...
with @cbiogeo.bsky.social Catherine Lovelock, A Aldrie Amir, Cornelia Rumpel, Dr. Tuhin Bhadra, Sarah Robin, Cyril Marchand, Amrit Mishra, Syed Hilal Farooq, NIcolas Bottinelli,

NUTRIBOR: Unraveling Boron Isotope Dynamics to Diagnose Forest Nutritional Stress The NUTRIBOR project addresses a critical gap in our understanding of tree mineral nutrition under global change by leveraging non-traditional boron stable isotopes (δ¹¹B) as tracers of geo- versus…

We will use these little eucalyptus in mesocosms inside our large ecotron mimicking Brazilian climatic conditions in order to evaluate if the boron isotope signal is a good tracer of nutrition and water stresses. More about the Nutribor project here: www.samuelabiven.org/projects/nut...

Little eucalyptus trees will grow big... We have just received a shipment from our CIRAD collaborators in Brazil @cirad.bsky.social

Some impressions from the field ...
In the frame of the Sybio project (www.samuelabiven.org/projects/val...), we were in the field last week at St Brieuc's Bay (BZH) to collect green algae in order to turn them into biochar...

This project is a collaboration between Audrey NIBOYET (@ieesparis.bsky.social ), Nicolàs RASCOVAN (@pasteur.fr‬), Leandro QUADRANA (‪@univparissaclay.bsky.social‬) and myself. Stay tuned as we share updates, data, and discoveries from this ambitious 4-year project funded by @ANR_Research.

Beyond science, EcoSoilChange aims to inform policymakers and environmental managers with predictive tools for soil conservation and climate adaptation strategies. We’re pushing the boundaries of ecosystem science with real-world impact. #PolicyImpact #Sustainability

Our multi-disciplinary team combines genomics, biogeochemistry, and microbial ecology to uncover how soil properties influence adaptation. Arabidopsis thaliana populations will help us track genetic responses to environmental stress. #PlantScience #EcoGenomics #SoilScience #biogeochemistry

Using the groundbreaking Ecotron facility, we will simulate realistic past, present, and future climate scenarios to study soil and plant dynamics under changing conditions. This is a huge step toward predicting ecosystem resilience. #GlobalChange #SoilEcology

Here a description of the project www.samuelabiven.org/ecosoilchang...

Exciting news! Our EcoSoilChange project has been officially selected by the French National Research Agency (ANR) for funding. We’ll explore how plant-microbiome-soil ecosystems respond to climate change with cutting-edge climate simulations at the CEREEP Ecotron Ile-de-France. #Ecotron #ANRfunded

Carbon cycle on fire - New insights in the #carbon cycle of terrestrial ecosystems. Soutenance de HDR de @cbiogeo.bsky.social le 11 avril 2025 à 14h à l'amphi Jaurès de l'ENS (29 rue d'Ulm, Paris 5e). www.geosciences.ens.fr/recherche/seminaires

📢 #Postdoc Opportunity! 🌱🔬
Join an #Ecotron project on soil #carbon sequestration @ecotron-cnrs.bsky.social

🔗 Apply here: emploi.cnrs.fr/Offres/CDD/U...

📍 Work with @alex-ecology.bsky.social & @cbiogeo.bsky.social

📢 Please share!

#Soil #Biochar #Weathering #AcademicJobs #JobOffer #CarbonScience

Science on the go: bringing labs into the field ‘Lab vans’ and other facilities can bring researchers closer to what they study.

Very nice article in @nature.com about how bringing labs into the field is an incredible opportunity for environmental sciences & how it's a dream come true for many of us. Meet @nikobiota.bsky.social, head of @embl.org Mobile Labs. #protistsonsky #jcampubs
www.nature.com/articles/d41...

A réécouter en podcast ! On y parle de plein de choses intéressantes notamment de travaux menés au CEREEP Ecotron

Changement climatique : gare aux microbes Les microbes n’échappent pas aux conséquences du réchauffement climatique, lequel s’est aggravé durant 2024. Quel est leur rôle dans les émissions de GES ? Comment évoluent-ils face au réchauffement ?...

Les microbes n’échappent pas aux conséquences du réchauffement climatique. Quel est leur rôle dans les émissions de GES ? Comment évoluent-ils face au réchauffement ? Quels sont les risques pour les humains ?
@natachatriou.bsky.social @sciencecqfd.bsky.social
www.radiofrance.fr/francecultur...

This could lead to improper compensation of carbon emissions and wrong reporting of carbon sinks in national carbon accounting schemes. We recommend not to use HTT as a predictor for persistence and stress the importance to rapidly develop more accurate proxies of biochar C persistence in soil.

We demonstrated that HTT is the main driver of H:C - an indicator of persistence - but that it is not measured accurately enough to precisely predict it. We examined the equations available in the literature and showed that calculated from HTT presented little agreement with calculated from H:C.

In this paper we collected a dataset of 1230 biochar characteristics to re-evaluate the effect of pyrolysis parameters on biochar characteristics and the possibility to predict from the maximum temperature reached during pyrolysis (HTT).

A critical re‐analysis of biochar properties prediction from production parameters and elemental analysis Biochar is obtained from controlled pyrolysis of organic feedstocks in order to achieve desired physico-chemical characteristics. We analyzed published data on biochars to re-evaluate the effect of p...

New paper !!!
A critical re‐analysis of biochar properties prediction from production parameters and elemental analysis - Lebrun Thauront - 2024 - GCB Bioenergy - Wiley Online Library onlinelibrary.wiley.com/doi/full/10....

Jeudi prochain, nous avons le plaisir d'accueillir Anne Le Strat pour une conférence sur l'eau et la politique de l'eau, basée sur son expérience au sein du service public Eau de Paris et à l'international
Au département de Géosciences de l'ENS Paris

Extinction of experience among ecologists Fieldwork-based research and education in ecology are under multiple threats and are progressively declining. We call for greater attention to this ongoing loss of direct field experience within the ecology community, as it could have widespread consequences for science and education, ultimately hindering efforts to address the ongoing biodiversity crisis.

"There has been a progressive decline in fieldwork-based research and education in ecology over recent decades", precisely at a time when we most urgently need a better understanding of how natural systems work. So sad.

Trends in Ecology & Evolution [paywalled] www.cell.com/trends/ecolo...