Arjun Chakrawal अर्जुन चक्रवाल

In this work, we introduce an optimality-based eco-evolutionary model of carbon partitioning between root growth and exudation under nitrogen limitation. The model captures key trade-offs in plant nitrogen foraging strategies and aligns with observed belowground responses across soil N regimes.

Preprint out

Modelling belowground plant acclimation to low soil nitrogen – An eco-evolutionary approach
www.biorxiv.org/content/10.1...

Excited to share this new work with my coauthor and equal contributor Tino Colombi.

#plantecology #nitrogen #rootbiology #ecosystemmodelling #preprint

Work on soil bioenergetics? Come present at CANVAS 2025 (Nov 9-12, SLC, UT) www.sciencesocieties.org/canvas Session entitled “Linking C and Energy Fluxes in Soil”, co-org by me, Liliane Ruess (Humboldt Univ of Berlin) and @arjunchakrawal.bsky.social (PNNL). Look forward to your submissions!

📢 Due today: Submit an application by today Nov. 25 to attend EMSL's MONet Community Science Meeting (Feb. 4-6): www.emsl.pnnl.gov/events/2025-...
EMSL will cover travel expenses up to $1,250 for 10 undergraduate or graduate students and postdoctoral researchers.

Congratulations @ultracricket.bsky.social.

Curious if you think the spatial patterns in hyphae networks somehow controls respiration rates?

Grateful for the support of my mentor @manzonilab.bsky.social at Stockholm University, and awesome collaborators Björn Lindahl at SLU and Odeta Qafoku at EMSL. #researchHighlight #pnnl #stockholmuniversity #emsl #plant #NMR

Systematic Differences in Molecular and Extraction-Based Measures of Plant Litter Chemical Composition A multi-institutional team of researchers systematically compared extraction techniques for characterizing plant litter composition that relies on organic matter extraction.

Check out- PNNL featured our article "Comparing plant litter molecular diversity assessed from proximate analysis and 13C NMR spectroscopy". 🌱

You can find the link to article on the link below.

www.pnnl.gov/publications...

My pick from the list

A novel organelle, the nitroplast discovered in the marine alga Braarudosphaera bigelowii. "this finding and related work hint at the possibility of future crops endowed with nitroplasts that would enable them to fertilize themselves."

If interested in learning how I have been using eco-evolutionary optimization for understanding below ground carbon allocation do visit my session next week at #AGU24

#PNNL #EMSLScience #MONet

go.bsky.app/ACjNUuz

Let me know if you want to join 🦠🌍🤗

Just one week until the support deadline for #EGU25!

We're convening "Microbial growth, death, and turnover: experiments and models to decode soil complexity" with Sergey Blagodatsky, @katerinageorgiou.bsky.social & invited speaker Stefano Manzoni.
meetingorganizer.copernicus.org/EGU25/sessio...

📢 Due today: Submit an application by today Nov. 25 to attend EMSL's MONet Community Science Meeting (Feb. 4-6): www.emsl.pnnl.gov/events/2025-...
EMSL will cover travel expenses up to $1,250 for 10 undergraduate or graduate students and postdoctoral researchers.