Dr. Jennifer Pett-Ridge

@jeffinerca.bsky.social

Mom/mentor/microbial ecologist. Soil C persistence & CDR for healthy soils and climate resilience. Using stable isotope probing, ‘omics, systems analysis. Lead of LLNL Carbon Initiative, Microbes Persist, & Terraforming Soil Earthshot. Roads2Removal.org

I just followed this advice to comment on the OMB rule changes. There are about 3 hours left before the deadline (tonight at 11:59p EDT). If you benefit from US Government-funded research make sure to get your comments in. elizabethginexi.substack.com/p/what-we-ne...

What We Need to do NEXT: OMB’s Proposed Federal Financial Assistance Rule (OMB-2026-0034)

What OMB’s Proposed Federal Financial Assistance Rule Means in Practice

elizabethginexi.substack.com

#SOM2026 in São Paulo has been amazing! Huge thanks to the hosts who invited me to give a keynote talk about surprising biology in deep soils Escola Superior de Agricultura Luiz de Queiroz - ESALQ/USP and the CCARBON/USP - Center for Carbon Research in Tropical Agriculture

Jen Pett-Ridge standing in front of large sign welcoming delegates to Soil Organic Matter 2026 meetingThree soil scientist posing together at the Soil Organic Matter 2026 meetingJen Pett-Ridge and Diego Barcellos pose for a photo at the Soil Organic Matter 2026 meeting

California gubernatorial candidate Xavier Becerra just took half a million dollars from the fossil fuel industry. This on top of the max contribution from Chevron. When someone shows you who they are, believe them.

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Today was a good day. Each year in mid-April, I give one of my favorite lectures...at Berkeley High School's 9th grade Climate Conference. We talk about Farming Carbon, how rocks (minerals) + roots + microbes + water = soil. We go over how the earth system is changing...

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Spent the evening helping my 16 yo study for her IB Bio exam — ecology and evolution unit. And darned if I don’t actually know some stuff!! Like… all of it. Somehow reaffirming that— even with all the chaos, funding disappearing, sponsors imploding…I still think I chose the right career.

there's a lot going on right now but did you know a massive amount of the world's fertilizer flows through the middle east, and did you know that that fertilizer needs to be shipped to the us *right now* for planting season, and uh did you know we are at war with iran

Trump’s War on Iran Could Screw Over US Farmers

The Middle East supplies a huge amount of the world’s fertilizer. Conflict in the region has sent prices soaring ahead of the critical spring planting season.

wired.com

EMSL-JGI meeting in Seattle was pretty great! (although I’ll be happy when we can stop talking nonstop about AI and just use it like any other tool). Best part by far was getting to see my dear friend and former postdoc Ashley Campbell.

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We are recruiting a postdoc to study wetland plant-soil-microbe interactions using isotope labeling in our greenhouse at LLNL with me and Erin Nuccio as part of a multidisciplinary project. Experience with wetland plants and SIP a plus. Please share! www.linkedin.com/posts/activi...

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