David Ho

In our latest paper with Manon Berger, Lester Kwiatkowski, and Laurent Bopp, we show that if we properly account for iron limitation and nutrient competition with phytoplankton, growing seaweed isn't really an effective technique for removing atmospheric CO₂.

https://www.nature.com/articles/s41467-026-73168-z

Efficacy of seaweed-based carbon dioxide removal reduced by iron limitation and nutrient competition with phytoplankton - Nature Communications

This study shows that when iron limitation is considered, there is nowhere in the ocean that is suitable for growing kelp for carbon dioxide removal.

Nature
May 29 at 8:13amWeb
Show threadDr Susi ArnottMay 29
@davidho
#stopfossilfuels #nomagicbullet
#algaedon
Show threadsunflowerinrainMay 29

@davidho
That's sad.

How about we just grow seaweed for food?

Show threadDr Susi ArnottMay 29
@sunflowerinrain @davidho
You probably know that already happens - tiny example here
https://www.carymor.wales/
#algaedon
Câr-y-Môr | Wales' first regenerative seaweed & shellfish farm

Câr-y-Môr: Wales' pioneering community-owned ocean farm, cultivating sustainable Welsh seaweed and shellfish in Ramsey Sound. Discover more.

Câr-y-Môr
Show threadsunflowerinrainMay 29
@SusiArnott
I miss laverbread. Last year, I bought a big box of dried Spanish seaweed; six varieties, and none of them make laverbread!
Show threadDr Susi ArnottMay 30
@sunflowerinrain
Hardly worth buying just one tin, so we're still working our way through an order... mixing with minced onion and black olives + oatmeal filler to make little fry able cakes
Not everyone likes them
Hey ho
https://beachfood.co.uk/products/parsons-tinned-laverbread
Parsons Tinned Laverbread 120g

Show threadsunflowerinrainMay 30
@SusiArnott
Yes!
...
Oh. They don't export. *sob*
Show threadDr Susi ArnottMay 30
@sunflowerinrain whereabouts in France are you... there might be a way...
Show threadsunflowerinrainMay 31
@SusiArnott
Between La Rochelle and Bordeaux. Are you visiting? Three guest bedrooms here.
Show threadDr Susi ArnottMay 31
@sunflowerinrain No, idly wondering if you were anywhere near anyone I know but it seems not. Sorry-oh!
Show threadsunflowerinrainMay 31
@SusiArnott
Oh. I was hoping to meet a mastodonian!
Show threadDr Susi ArnottMay 31
@sunflowerinrain Appreciating the kind offer! But trips to Wales, Scotland, Ireland and Teesdale are already crowding the diary.
Laverbread will come to you somehow, I'm sure...