It's no surprise that microorganisms evolve quicker to adapt to environmental changes. (At least for evolutionary / genetic changes).
That makes me wonder if we'll soon see mammals with gut microbiomes that can digest microplastics.
wswope•1h ago
Yeah, I really look forward to seeing more research on the ability of these PETase genes to spread. The article touched on it briefly, but it’d be great to have more insight on how much of this is due to HGT vs. something likely to originate de novo across species.
> That makes me wonder if we'll soon see mammals with gut microbiomes that can digest microplastics.
On a less serious note, my cat is deadset on this accomplishment.
evilduck•1h ago
Makes me wonder if we're building towards another extinction/oxygen catastrophe type of event. Not one where the microplastics themselves are the primary driver, but because microplastics are not renewable in the environment without humans. With solar energy transitions, greater pollution awareness, and a population that's shrinking or leveling off, what will happen to all of the microorganisms which spent a great deal of energy evolving ways to metabolize plastics that suddenly lose that source of energy? They're suddenly less fit for their niche.
Or in a different area of concern, what happens to the plastic economy when plastics are no longer useful because they'll be decomposed too quickly? Sanitary packaging for medical supplies come to mind.
bilbo0s•48m ago
>what will happen to all of the microorganisms which spent a great deal of energy evolving ways to metabolize plastics that suddenly lose that source of energy?
As the article implies, microorganisms evolve relatively quickly. So the answer is, they would evolve to consume another source of energy. (As has happened for the subjects of the article in the opposite direction.)
BobbyTables2•46m ago
I think environmental conservation efforts would have to be fairly successful for your concern.
Fortunately, the US will see that possibility isn't very likely. In the 1980s, there was growing concern about the use of plastic and styrofoam one-time packaging. Both still widely used today…
bee_rider•43m ago
On an evolutionary timescale, our plastic era probably won’t last very long, right? The byproducts might, but I guess if something learns to eat them, not so much.
Actually it seems pretty crazy that they are figuring it out so quickly (guess there’s lots of energy bound up in those molecules).
bee_rider•45m ago
I guess we’ll have to go back to our old friends glass and copper. Petrochemicals were a fad anyway; glass and copper have been with us the whole time.
rob74•22m ago
Well yeah, if we insist on continuing to burn our limited supply of hydrocarbons, soon(ish) we won't have enough for making plastics either. Or plastics will become prohibitively expensive...
igor47•12m ago
This is not true in a practical sense. There is a lot of petrochemicals still out there and our ability to recover marginal reserves keeps improving. I was really into the idea of peak oil when I was younger but it really hasn't panned out. Rather, if we continue to using oil, we'll cook ourselves and drown ourselves in plastic.
topaz0•31m ago
Just because they can digest PET does not mean they cannot digest other things. Being able to switch between food sources as they become more or less abundant is a very common adaptation.
HPsquared•24m ago
It might be a bad idea to digest plastics. If they get broken down in the gut, they'll release all those plasticisers and things into the body.
samrus•18m ago
Evolution would figure that out over time with trial and error. We could instead get mammals with plastic nails/claws/hooves instead of keratin
PaulHoule•15m ago
e.g. keratin and cellulose are structural polymers not too different from materials like PET.
lagniappe•9m ago
Can somebody do the napkin math on an estimate for how long for us to get plasticized hair and nails and teeth?
dukeofdoom•1h ago
This implies in the future plastic will rot like wood.
seydor•44m ago
Protect your plastics with aluminum foil
cogman10•9m ago
Yup. In most cases, not a big deal. Plumbing, however, is going to be a nightmare.
gmuslera•1h ago
Life finds a way. Add a potentially usable food source in big enough numbers and the ones that take advantage of that will thrive.
tokai•1h ago
So we could end up in a situation where we do ecological harm if we stop using plastics.
I'm guessing evolution of these is driven more by microfibers from polyester cloth (which is also PET) rather than plastic bottles. The fibers have much higher surface area for bacteria to attack.
perlgeek•1h ago
That makes me wonder if we'll soon see mammals with gut microbiomes that can digest microplastics.
wswope•1h ago
> That makes me wonder if we'll soon see mammals with gut microbiomes that can digest microplastics.
On a less serious note, my cat is deadset on this accomplishment.
evilduck•1h ago
Or in a different area of concern, what happens to the plastic economy when plastics are no longer useful because they'll be decomposed too quickly? Sanitary packaging for medical supplies come to mind.
bilbo0s•48m ago
As the article implies, microorganisms evolve relatively quickly. So the answer is, they would evolve to consume another source of energy. (As has happened for the subjects of the article in the opposite direction.)
BobbyTables2•46m ago
Fortunately, the US will see that possibility isn't very likely. In the 1980s, there was growing concern about the use of plastic and styrofoam one-time packaging. Both still widely used today…
bee_rider•43m ago
Actually it seems pretty crazy that they are figuring it out so quickly (guess there’s lots of energy bound up in those molecules).
bee_rider•45m ago
rob74•22m ago
igor47•12m ago
topaz0•31m ago
HPsquared•24m ago
samrus•18m ago
PaulHoule•15m ago
lagniappe•9m ago