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So when we say Climate Change is an immediate and irreversible threat… There’s another clause there that’s something like: but not to us right now as a species, more to the biodiversity that would be put at risk if we tried producing more Algae? So we’re not going to address the “immediate and irreversible threat” in that way, because it might upset other things in the ocean.

Would those other things be stuff like… Er… Important stuff. I’m just not sure about this stuff because I don’t know that much about Climate Change in relation to Algae and Oxygen production.

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RedAggroBest@lemmy.world ⁨5⁩ ⁨weeks⁩ ago
The ocean is the Earth’s largest carbon sink. If we fuck it up worse by “just growing algae” we would absolutely fuck ourselves 10x faster.

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- DarkCloud@lemmy.world ⁨5⁩ ⁨weeks⁩ ago
  Not trying to be a dick, but I figured Algae is still a carbon based life form… So I googled and it said: Uptake of CO2 by algae is approximately twice of the weight of algae.
  
  But I assume other stuff is doing most of the heavy lifting… I think I remember something about coral forests, just trying to ask people who know more - what’s taking up all that carbon? Is algae a threat to it?
  
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  - Lyrl@lemm.ee ⁨5⁩ ⁨weeks⁩ ago
    It’s not just the uptake, it’s whether it stays at the surface, ultimately releasing the carbon back into the atmosphere via decomposition gases, or sinks to the ocean floor, thus locking up the carbon in oceanic rock.
    
    We have a good handle on understanding the uptake. It’s the float vs sink part that has the critical uncertainty.
    
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nettle@mander.xyz ⁨5⁩ ⁨weeks⁩ ago
Algae itself needs a functioning ecosystem to survive, to much algea will cause it to kill itself due to overpopulation (e.g. using up resources and dead algea not being cleaned up) while in a small scale humans can care for the algea, taking the place of the ecosystem, for any large area this would be unfeasible and the ecosystem including the algea would collapse.

A benifit of biodiversity is greater resilance to change, by selecting for the growth of specific algea using iron you cause other algea/plant that rely on the prior ecosys to die out (including those reliant on other organisms which died). this group of less diverse algea will be more susceptible to change, (diseases or environmental change) and as most of the algea in the world will be similar, most of the algea in the world could get wiped out in one go.

So the likely outcome would be an initial spike in carbon capture before the environment becomes unsuitable, collapses, and most of the algea dies.

So all im all at any meaningful scale in the sea this is and will always be, a terrible idea.

(A better idea would be lots of small manigable algea tanks which could realistically be maintained and won’t affect the current diversity, diseases could also not spread between them. This would be expensive but could actually work as a long term solution)

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