Ivan Cornut

Eco-physiology researcher at @Cirad and UMR Eco&Sols. Working on nutrient cycles in Eucalypt plantations and the functionning of cocoa agroforestry in Cameroon.

[Ben Noll @BenNollWeather]

The weather over Africa is very weird right now and it's affecting hurricane season.

Typically, African Easterly Waves, or hurricane seedlings, swirl from the Guinea Highlands in West Africa into the tropical Atlantic where they strengthen during late August and September.

This year, the wave train is displaced north of its average position and waves are instead rolling into... the Sahara Desert! 🌵

The map below illustrates where rainfall over the next 10 days is forecast to exceed the *record maximum monthly rainfall* in September, dating back to 1940.

It includes Algeria, Mali, Libya, and parts of Niger where little or no rainfall typically falls this time of the year!

The northward-displaced wave train is one of the factors influencing the current lack of tropical activity in the Atlantic.

This data quantifies just how unusual things currently are over Africa...

[Maxime @mduthoit1]

1st water potential measurement day🌿🌞 did with @ICornut, @JoGuillemot & J.Ngao : innovative sensors in progress to be validated⏳☑��� ! @UMR_EcoSols

[Carole Delga @CaroleDelga]

Agir en responsabilité et être à la hauteur de l’Histoire : le #NouveauFrontPopulaire et républicain est né.

Réveillons l’espoir et repoussons l’extrême-droite. Pour la justice sociale, le vivre-ensemble et le progrès : la gauche qui change la vie !

Rejoignez-nous.

[François Ruffin @Francois_Ruffin]

Nous, députés insoumis, écologistes, communistes, Génération.s portons un mot d'ordre : unité.

Derrière une bannière : front populaire.

Avec un but : gagner !

Il n’y a pas de fatalité, nous pouvons l’emporter.

Soutenez, signez : https://t.co/3Vkh0IYccV

#FrontPopulaire

[Rémi Vezy @VezyRemi]

🔥📢We are hiring a Research Scientist in Functional Architecture applied to Tropical Forest and Agroforestry (permanent position). If you are interest in plant architecture, plant growth, lidar and ecophysiology, this position may for you!
https://t.co/9qbnwhvNf9

[Ivan Cornut @ICornut]

Un poste d'assistant ingénieur ouvre dans notre UMR @UMR_EcoSols. Envie de concevoir et de mettre les instruments pour la recherche de pointe en sciences de l'environnement ? Venez rejoindre l'équipe pour instrumenter des sites de la Méditerranée aux tropiques !

[Maxime @mduthoit1]

📢#Recrutement au concours externe @ird_fr : Assistant-e ingénieur en #instrumentation, #expérimentation et #mesure à l’@UMR_EcoSols

➡ Toutes les informations pour candidater ici 👇
https://t.co/8S1iU5IwQh

N'hésitez pas à partager ! Merci !🙏

[Maxime @mduthoit1]

📢#Recrutement au concours externe @ird_fr : Assistant-e ingénieur en #instrumentation, #expérimentation et #mesure à l’@UMR_EcoSols

➡ Toutes les informations pour candidater ici 👇
https://t.co/8S1iU5IwQh

N'hésitez pas à partager ! Merci !🙏

[New Phytologist @NewPhyt]

A meta-analysis highlights globally widespread potassium limitation in terrestrial ecosystems

📖 https://t.co/KyssnvDzKY
by Chen et al.

@wileyplantsci #PlantScience

[Crémieux @cremieuxrecueil]

The adoption of cellphones by Keralan fishermen is, I believe, the most stunning example of the contribution of information technology to market performance.

Take a look at this graph for background: in three different regions of Kerala, phones were adopted at different times.
Kozhikode got cellphones before Kannur, who got them before Kasaragod. Adoption by fishermen was fast when phones were finally introduced:
Now look at what happened to the price of fish after phones entered the scene:
The dispersion in prices virtually disappeared! The author of the study wrote about this that:

"Before any region had mobile phones, the degree of price dispersion across markets within a region on any given day is high, and there are many cases where the price is zero (i.e., waste). However, within a few weeks of mobile phones being introduced in Region I, there is a sharp and striking reduction in price dispersion. Prices across markets in the region rarely differ by more than a few rupees per kilogram on any day, compared to cases of as much as 10 Rs/kg prior to the introduction of mobile phones. In addition, the prices in the various markets rise and fall together and the week-to-week variability within each market is much smaller, since catchment zone-specific quantity shocks are now spread across markets via arbitrage. Further, there are no cases of waste in this region after phones are introduced.

"By contrast, price behavior in regions II and III appears largely unchanged after phones are introduced in region I. However, after mobile phones are introduced in region II, prices again become much less dispersed across markets on any given day, less variable within markets over time, and waste is ultimately eliminated, whereas region III again remains unchanged. Finally, the same pattern holds once region III adds phones."

Efficient information transmission enables efficient markets. It's amazing what technology can do.

Read the study here: https://t.co/JcgGQp3G0C

[Andrew D Hanson Lab @ADHansonLab]

Can BNF by soil bacteria replace Haber-Bosch N? We ran the numbers ⬇️ Answer: Partly. And the more the replacement, the less the yield. Splitting the N-N triple bond takes energy & that ultimately comes from the crop 1 way or another. "Follow the energy" https://t.co/kkZfb4iwpz

[labexARBRE moving to ARTEMIS program @labexARBRE]

Ca biogeochemistry important, but yet unrecognized, implications for the plant physiological upregulation of carbon and water cycles. Read : Calcium availability affects the intrinsic water-use efficiency of temperate forest trees
https://t.co/vz9xqCVZIQ

[Plant Physiologist @P_Physiologist]

Release: StomaAI (SAI)

StomaAI (SAI) is a third-party app for auto-measuring stomatal density and pore features (width, length and area) from microscope images with human-level accuracy via deep computer vision.

https://t.co/yvx3vgEqL3

[GRA @GRA_GHG]

📢 #Postdoc & #PhD opportunities in #LivestockSystems at @TU_Muenchen with @MarianaCRufino!

📌Apply by 19 May

Postdoc: Modelling livestock systems

#PhDposition:
- Nutrient cycling & carbon storage in grazed systems
- Tropical grasslands restoration

https://t.co/91Sv6ANLGO

[Ivan Cornut @ICornut]

Interested in tree ecophysiology and models ? Join us at Cirad and Eco&Sols to work on the mecanistic modelling of rubber tree plantations. Make use of a very comprehensive dataset to simulate fluxes of carbon water and energy in this sytem: https://t.co/9zUYEZTmtS

[sleguilFR @sleguilFR]

Ce qui est intéressant dans ces échanges, ce n'est pas les faits ou les chiffres, mais le fait qu'ils révèlent tout le paradoxe de l'écologie dans le système actuel : malgré les études d'impact et les compensations, la biodiversité continue de chuter. 🌿 1/n

[Guy Coleman @GeezaColeman]

Usually these models struggle with plants, but the performance on weeds with SAM is 🤯

Wild radish in wheat? Sure.

Blue lupins in lupins? Why not.

This is entirely using the demo. No training on any crop involved.

[John Burn-Murdoch @jburnmurdoch]

NEW: I’m not sure people fully appreciate how dire the US life expectancy / mortality situation has got.

My column: https://t.co/dBIhT9eZLv

And some utterly damning charts.

1) at *every* point on the income distribution, Americans live shorter lives than the English.

[Andrew McGuire @agronomistag]

Local development in Richland, Washington: The first-ever carbon-free nitrogen fertilizer production plant will cost $1.1 billion to build.
"new nuclear"?
https://t.co/g1KGsIEmR6

[Joannès Guillemot @JoGuillemot]

We have an opening for a permanent researcher in soil sciences and tree nutrition in our team @Cirad

The successful candidate will develop research in #Brazil on #biodiversity-#ecosystemfunctioning relationships

Come work with us! :)
https://t.co/RpGoMokcMU

[Maxime @mduthoit1]

⚠️Ouverture d'un poste 🍂🌳🌱au @Cirad 🇫🇷✈️🇧🇷 @JoGuillemot

Chercheur.e en sciences du sol et nutrition des plantes https://t.co/WbOxZAGoi7