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skew-aberration 15 hours ago [-]
Coral gets its color from algae called zooxanthellae, which it depends on for photosynthesis.
Bleaching is actually due to the coral expelling those algae. Bleached corals are not dead, and remarkably they can not only let the algae in again but can also select a different algae species to cultivate (changing colour in the process)!.
This is thought to be a deliberate survival strategy to optimize the species of algae under different conditions (Adaptive Bleaching Hypothesis).
Bleaching is caused by the same stressors (like high temperature) which kill coral, but bleaching itself is not death of the coral.
suncemoje 7 hours ago [-]
> Bleached corals are not dead
My open questions would be:
1. What's the consequence of corals expelling algae?
2. Why does heat make corals expel algae?
skew-aberration 6 hours ago [-]
1. The coral slowly starves to death. Like a tree without leaves
2. It's complicated but the algae essentially start damaging the coral in these conditions. Their photosynthesis mechanism runs into overdrive, generating too many electrons. With no way to consume this much power it dumps the energy into making reactive oxygen species which it ejects. These damage the coral (and the algae). The same thing occurs in plants - a fern growing on the forest floor can't handle full sunlight (photodynamic stress). Plants are less temperature sensitive though because they have active cooling (transpiration). But temperature and quantity of light both affect the photosynthesis machinery.
suncemoje 6 hours ago [-]
That makes me wonder - I’m sure it’s not a novel thought - if there is a more suitable species of algae for these conditions we can inject into bleached corals?
Impressive that corals have such a survival mechanism. But hopeless if no other species of algae can enter another symbiotic relationship with them?
OneDeuxTriSeiGo 5 hours ago [-]
> That makes me wonder - I’m sure it’s not a novel thought - if there is a more suitable species of algae for these conditions we can inject into bleached corals?
TLDR Yes but it's complicated. There are more suitable algae species but AFAIK coral under heat stress will still often expel the algae even if the algae isn't the one stressing the coral. So you have to essentially breed a more tolerant coral and then provide the algae.
Now luckily there do exist more heat tolerant coral and algae species living alongside each other. Unfortunately those species are located in the Persian Gulf/inside the Strait of Hormuz so they are regularly subject to added stressors from Oil/NG extraction, military conflicts, and waste dumping. And of course their location makes research on them/collaboration between research institutions complicated.
And it's not like you can just transplant these coral somewhere else and they'll live. They are adapted to their environment and that environment plays a part in their heat tolerance as well. But research on these coral ecosystems will likely shed a light on how to help other coral species to adapt and evolve.
suncemoje 2 hours ago [-]
> TLDR Yes but it's complicated. There are more suitable algae species but AFAIK coral under heat stress will still often expel the algae even if the algae isn't the one stressing the coral.
Maybe the pharmaceutical industry can target a new market here...
sfn42 3 hours ago [-]
It's not just heat, it's ocean acidification. As the concentration of CO2 in the atmosphere increases, CO2 in the water increases as well. When CO2 dissolves into water, it forms carbonic acid. This is the same stuff that makes fizzy drinks like soda taste sour.
So more CO2 in air = more CO2 in the water = lower PH in the ocean. I don't know the details but the more acidic water messes with the chemical processes that corals and other aquatic life depend on.
JumpCrisscross 14 hours ago [-]
> Bleaching is actually due to the coral expelling those algae
Due to the coral or due to the algae? Put another way, could we engineer UV resistance into the algae?
booi 14 hours ago [-]
It's not UV that's the problem but heat. We could possibly cultivate algae that are more heat resistant?
skew-aberration 13 hours ago [-]
I'm not an expert, but yes we can and we do.
And so does the coral!
If a species of algae cannot handle high temperatures without generating chemicals like hydrogen peroxide which trigger the bleaching, then that species is ejected sooner and more frequently during warmer months, creating selective pressure for species that can.
To survive these conditions without getting ejected, the algae need to essentially run their photosynthesis process more slowly. They produce less chlorophyll per cell and create sacrificial 'photoprotective carotenoid pigments' which act like sunscreen and dissipate that potential sunlight energy as useless heat (coral has a few tricks too fluorescent proteins).
So the coral is actually in a delicate balancing act, selecting the most aggressive/productive algae which won't also try to kill it during summer. Corals will learn to be more conservative in their selection and algae will get more conservative themselves. We want this process to happen quickly enough so that we don't lose coral coverage and diversity in the coming decades / centuries, but we can be confident that on longer timescales the coral will adapt, assuming we don't get runaway warming.
dillydogg 13 hours ago [-]
This is actually in process, though my understanding is that it doesn't seem to keep up with the pace of ocean temperature rise.
Having been a diver on the Great Barrier Reef numerous times, the scale of bleaching events means that there is often no non-bleached neighbour for vast distances. Healthy propagation rarely occurs before the brown sludge sets in, then its game over.
verelo 17 hours ago [-]
This kills me. I saw the reef for the first time around 2007. I went back twice, and the last time I was there (2017) I honestly couldn't believe what I saw. Wasteland? An under water desert? I don't have words for it, but I don't really want to go back because it hit me so hard. Our planet is dying and we're sitting here debating why/who and not doing anywhere near enough to fix it.
I'm so glad we have space rockets, flying cars and drone warfare...but I'd trade it all in for the reef to come back.
ChadNauseam 16 hours ago [-]
> I'm so glad we have space rockets, flying cars and drone warfare...but I'd trade it all in for the reef to come back.
It's really just climate change. (Ocean warming is what causes bleaching.) Luckily, since the 80s we've had the technology to generate energy without releasing greenhouse gases. I wish more people knew about the harms caused by climate change because maybe if they were they'd be more interested in preventing them.
Nition 15 hours ago [-]
I feel like the harms were really drilled into Millennials like myself but then we seem to have assumed that younger Gen Zs and gen Alpha will just receive the climate change wisdom via osmosis or maybe if we're lucky, their parents. I've seen more people worrying about under-population (under population! Remember over-population?) than the environment recently. Maybe we need to bring Captain Planet back.
zanderwohl 14 hours ago [-]
To be fair, overpopulation was never an actual concern. Since the 1800s, food production growth rates have outpaced population growth rates. Underpopulation _is_ a concern when infrastructure and social structures may not be able contract quickly enough to sustain our current quality of life.
adrianN 10 hours ago [-]
As long as the population depends on non-renewable resources, technically any population size is overpopulation. With the technology we currently use our population levels can't be sustained for very long.
lukeify 13 hours ago [-]
Don't worry, overpopulation will come back as a concern when we get massive crop collapse due to climate change.
asdf88990 11 hours ago [-]
You can see all the bad things about modern cultivation but lack of resistance to climate change isn’t one.
Yes, for many swaths and types of traditional agriculture and fishing it will be doom, but this conversation isn’t about local ecosystem but global food production vs population growth.
Food production was never a problem, supply and management is.
Nition 14 hours ago [-]
The food scarcity concern was certainly overblown, I was thinking more about the environmental concern.
mitxela 1 hours ago [-]
Do you know why and how food production has been able to match population growth and how long much more it can scale? We are using almost all of earth's farmable land right now.
dylan604 14 hours ago [-]
GenZ and GenAlpha are yet to reach a point where they can do anything about it. Boomers are still making decisions and there's plenty of GenXers that are still clinging to the myth concept.
Until the Boomers finish ageing out and GenZ/A grow up to take the reins, the status quo stays
14 hours ago [-]
adrr 13 hours ago [-]
They don't have low turn out in general elections and almost non existent during the elections that matter the most, the primaries. Boomers are reliable vote so they pick the candidates and elect the candidates.
dylan604 13 hours ago [-]
Sounds like you're agreeing that GenZ/GenA need to do some more growing up to me.
rcxdude 12 hours ago [-]
Well, they could do more about it now, but it's the classic 'young people don't turn out to vote' issue.
lesuorac 8 hours ago [-]
They’ll vote for a candidate they feel interested in.
doesnt cover the common case when candidates are crap left and right, does it
MajorTakeaway 15 hours ago [-]
I really think that Disney shit really fucked your head up, NGL Gen Y.
Nition 15 hours ago [-]
You don't have to trust a kids' show, that's just to help build general awareness. The proof is clear enough in rising CO2 levels, global average temperatures, ocean heat content etc.
The power is yours.
dylan604 14 hours ago [-]
To me, the proof things can change was during the lock downs and saw how quickly things changed once all of the automobile pollution approached zero.
peterfirefly 8 hours ago [-]
> Luckily, since the 80s we've had the technology to generate energy without releasing greenhouse gases.
Longer. Nuclear power tech was pretty good in the 60s (outside of the Soviet Union).
vixen99 5 hours ago [-]
For a recent informative update from the Australian Long-term (coral) Monitoring Program see https://www.aims.gov.au/monitoring-great-barrier-reef/gbr-co.... The graphs show that Northern Barrier Reef and the Central Barrier Reef coverage have record high coral cover while the Southern Barrier Reef, "hard coral cover was relatively stable although decreased slightly to 26.4% (22.9–30.2% CIs) from 26.9% (23.0–30.9% CIs) in 2025. This represents a relative decline of 2.0% of 2025 levels, which is within the margin of error, and regional coral cover remains below the long-term average of 29.3% (27.5–31.3% CIs).". The sea surface temperatures remained 0.7–1.2°C above average across the Great Barrier Reef. The Australian Environment Foundation finds that ~80% of Australians think that the reefs are at a record low. Apparently, CO2 in 1985 was about 345.9 ppm. In 2026 it's was about 432 ppm - I haven't checked the actual Mauna Loa site.
arjie 15 hours ago [-]
Well, it's not the space rockets etc. that do this. It's the single-family homes with large yards with no apartment buildings nearby, and the ability to not look at wind turbines, and the community that we have managed to cultivate by living in our own detached homes. The things you have to trade to get the reef back are not usually the things you want to trade. Otherwise, we could happily trade those things. It's not like there are that many people making space rockets, after all. The hard part is giving up the things you want, like personal delivery food or a large car with a big road that has no traffic, or a large yard that you water, or living in the forest with two day delivery.
dalyons 12 hours ago [-]
We don’t really have to give these things up now though, renewable energy and EVs can guve us all this for no emissions. We for the first time ever, have the technology.
We just aren’t applying it fast enough for terrible & lazy reasons.
mikepurvis 16 hours ago [-]
That's horrifying to hear. I also went on a multi day dive trip at gbr and the coral sea in 2007 and it was spectacular; I can't imagine going back and seeing it degraded.
abletonlive 7 hours ago [-]
It's not degraded....this is misinformation lol. Please think for yourself and verify.
6 hours ago [-]
ryandrake 16 hours ago [-]
> Our planet is dying and we're sitting here debating why/who and not doing anywhere near enough to fix it.
If only we were just debating why/who! Thanks to Social Media, filter bubbles, and “alternative facts,” we are back to debating whether it is actually even happening or not.
smolder 60 minutes ago [-]
The same type of people who ran interference for the tobacco industry to prevent the public from believing cigarettes cause cancer are at work confusing people about global warming. In fact it's the same people in some cases.
kbutler 16 hours ago [-]
Happy to report the northern and central GBR coral cover is currently higher than any time measured before 2020. Southern is currently below its long-term average, but 2024 was a record high in coral cover.
This doesn't mean everything is fine, but it is doing way better than 2017.
grosswait 16 hours ago [-]
Wow, I wasn’t aware of this. I’ve always read climate change as the primary driver for bleaching. If that is the case, do we know why/how they’ve recovered?
skew-aberration 15 hours ago [-]
Corals are killed en masse by other events, particularly cyclones. These have a much bigger affect on coral coverage, in the short term, than ocean temperatures / bleaching (which is transient and more localized).
Bleaching is not death of the coral, it is the expulsion of algae (typically in high temperatures). The coral can find a different species of algae, or the algae can return once temperatures drop.
There are corals living in regions of the ocean with different temperatures, so it is not that high temperature alone would kill all coral, but populations adapted to a given region (like north vs south GBR) are being affected by the speed of the changes.
abletonlive 7 hours ago [-]
People believe the doomers a little too much. We should do everything we can to protect the coral reefs but I'm exhausted by the cynicism that's rampant. Even here in the HN threads people are convinced the GBR has collapsed and it is devastation. Couldn't be further from the truth. By the way...the GBR is collapsing and reforming all the time throughout the last ~30K years. It wasn't just some paradise that started to decline when humans showed up
mi_lk 15 hours ago [-]
I wonder if coral coverage is a meaningful stat itself. Does that directly translate to diversified creatures?
Was in central GBR this year, can't say I'm super impressed but not sure how I should set my expectation
skew-aberration 15 hours ago [-]
Not necessarily but they do measure diversity too, and it has not changed dramatically.
Typically the biggest change in diversity is due to cyclones which kill of the delicate and fast-growing corals like staghorns, which are also the fastest to grow back.
richardw 13 hours ago [-]
Surely the 2026 El Niño is going to drive hotter GBR temperatures?
djtango 10 hours ago [-]
Last I looked into this the reef was showing signs of recovery and when I was in Okinawa I saw that a man there has been breeding corals that are more resilient to warmer waters
throwaway2037 12 hours ago [-]
Why did you go three times? It is overpriced. Diving in Indonesia is much cheaper, and is less affected by bleaching.
verelo 11 hours ago [-]
Grew up in Australia, live in Canada. It’s just fun to stop up on the north before meeting up with family down south, gives me time to adjust and get some solo vacation time.
14 8 hours ago [-]
Our planet is not actually dying or anything close to dying. It is however rapidly changing and may reach a point where the planet is no longer survivable to humans, but life will go on without us. I get your point though and yes it is sad that we as a species have largely ignored the impact of our actions at the cost of our planet.
Nux 16 hours ago [-]
"The planet is fine, the people are fscked!"
Henchman21 16 hours ago [-]
"The Industrial Revolution and it's consequences have been a disaster for the human race -- and every other living being on the planet as well."
actionfromafar 16 hours ago [-]
At least we are owning the libs.
mannanj 15 hours ago [-]
How many humans are worth restoring the coral reef?
Because it’s nice to say these things in Sentiment, until you see past the naïveté to see human lives are what cause the wear and extraction on the environment. Humans live, eat, shit in, consume their environment for their lives.
How many humans are worth restoring the reef for you? And would you sacrifice your own friends and family?
verelo 15 hours ago [-]
This is an absurd remark.
You don’t need to sacrifice humans, you need humans to behave different. Do you know the energy requirements that go into war? The chemical, carbon and physical changes to the ocean from all we do?
We don’t need to kill more humans, we just need to stop being fucking idiots for a few hundred years.
0c3ca83 3 hours ago [-]
I can only assume this is satire.
jibalt 9 hours ago [-]
Sorry, but the ignorance and intellectual dishonesty of that comment is too thick to even warrant rebutting.
defterGoose 8 hours ago [-]
I mean this in the kindest way possible...stop being glad about that stuff. It's technobabble nonsense. It's not cool, innovative, or even truly productive. The "we can fly a rocket backward" shit is so boilerplate obviously iterative from a physics perspective. It's a mistake to be happy for these peoples' achievements anymore and it's old news.
This is the only planet we'll ever meaningfully have and we're killing it for "eternal" growth.
Thank you for your attention to this matter.
trombuance 10 hours ago [-]
The GBR is huge. Are you sure you visited the exact same spot (confirmed by GPS coordinates from the trip back in 2007)?
Anecdotally I was also there around 2006/2007 - somewhere near Cairns - and the part I saw was esentially dead, not just bleached. It really depends on where you go.
Btw since many in this thread mention ocean warming I want to mention that after having followed this for many years, and observed changes first hand in different parts of the world, my conclusion is that the main factor is direct human influence, not something more abstract like global warming. Especially water pollution as a result of agriculture, unchecked population growth and tourism.
One of the problems is all the people who say they love the reefs want to go where the reefs are still intact, after other parts have already been destroyed. Which then puts even more pressure on those last remaining healthy reef systems. Just talk to divers and listen to the exotic locations they travel to these days. I think many aren't even aware they're part of the problem. Or maybe they subconsciously shift the blame. Reefs are usually healthiest where there are no or very few people around.
jibalt 9 hours ago [-]
Global warming is not "abstract", and IS the main factor according to exhaustive data from the Great Barrier Reef Marine Park Authority (GBRMPA) and the Australian Institute of Marine Science (AIMS).
trombuance 7 hours ago [-]
It is an extremely complex topic that the average person has almost no understanding of, especially not after reading a few contradictory pop science and news articles written by non-experts.
The good news is you don't have to be an expert in geoscience to see the connection isn't as simplistic as many assume. Look at the data instead of having preconceived ideas. As an example, when you look at sea temperature data for many of the areas worst affected by coral death in recent decades (Maldives, Seychelles, parts of the Caribbean) you will see they have only seen moderate or even no temperature rise, while many other regions have seen more dramatic rise in local sea temperature and yet have healthier coral.
The fact that the GBR in Australia has seen temperature rise and coral death does not necessarily mean that there is a direct causation or even that it's the main cause. Have you considered other causes play a role?
aaron695 15 hours ago [-]
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krylonmae 2 hours ago [-]
Too much carbon emissions in the water from dirty chinese shipping container ships. It’s killing all the sea life and endangering our water supply. Their exhaust doesn’t go into the air, it goes straight into the water.
2 hours ago [-]
Okkef 18 hours ago [-]
Only if they are clones - genetically identical. So not much use in practice, unfortunately.
smallerize 18 hours ago [-]
I think the article says they just haven't tested other cases. I wouldn't expect the symbiotic microalgae to be that picky.
Edit - The article makes Okkef's point, I just missed it.
ceejayoz 18 hours ago [-]
The article says otherwise.
> Fragments from different species and even different animals of the same species did not fuse together, and so did not nurse the bleached piece back to health.
skew-aberration 15 hours ago [-]
High temperatures affect the algae itself. Transferring the algae to another live coral (bleached coral is alive) a) already happens in nature, if conditions return to normal b) does not protect the algae
kulahan 18 hours ago [-]
Sounds like a solution is still well within our reach. Normally I wouldn’t suggest something as extreme as using cloning techniques to restore wild creatures, but of course it was extreme actions that got us here in the first place, so I think this balances it out.
deadbabe 18 hours ago [-]
We don’t use cloning enough IMO.
linuskendall 17 hours ago [-]
We use cloning plenty - most fruits we eat are clones, and it has some drawbacks (see Cavendish bananas).
idontwantthis 18 hours ago [-]
We could create a bank of coral clones tagged to each individual location.
ghastmaster 15 hours ago [-]
Of note: This only occurred for fragments taken from an individual of the same genetic makeup(genet: basic meaning is they are a colony). Presumably, it would be difficult to recreate this at scale in the wild. I did not read past the free to read portion of the article that mentions scaling this is possible. I am curious about the methodology of that.
I find it strange that the first observance of this was a year ago, especially given how rapidly it occurs. Coral bleaching has probably been studied since the 80s when major events started being noticed. If Stephen Palumbi is reading this, I would love to read why you think it took so long.
edit: I would wager this is only the first published observance.
mochizou 9 hours ago [-]
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fosterfriends 19 hours ago [-]
Some good news :) anything to bring back coral reefs
0c3ca83 17 hours ago [-]
Anything but reducing the amount of fossil fuels we burn.
18 hours ago [-]
Glyptodon 10 hours ago [-]
So does this mean sicking refrigeration islands in key locations will be the way to stop permanent coral bleaching?
formvoltron 13 hours ago [-]
awesome. so we can recover the coral to have them die the next summer's heatwave. time to solve global warming!
kylehotchkiss 17 hours ago [-]
My first thought when reading the headline... horizontal gene transfer?
irq-1 16 hours ago [-]
> My first thought when reading the headline...
Conways game of life.
nomel 17 hours ago [-]
> This incredible new result
Only if you've never talked to anyone remotely involved with propagating coral, including those in the saltwater fish-tank community!
dang 11 hours ago [-]
Hey! If you know more than others, which it sounds like you do, can you please share some of what you know, so the rest of us can learn? If you only post a putdown of people who know less than you, it just makes the thread mean and the rest of us don't get to learn anything.
This is literal, partly how the guy down the street, at your local saltwater aquarium shop, keeps supply in stock. This is grafting/cloning from fragments, boring coral propagation, widely done for many decades. It only works very quickly for some coral though (there are over 1000 known).
Nobody involved with any of this consulted a marine biologist with a rudimentary understanding of coral, or the guy propagating it for a living down the road.
How did I know this? I did a report on coral when I was a kid.
kortex 8 hours ago [-]
This sounds like propagation of algae from unbleached to bleached coral, not colonization of skeletal structure.
>
Nobody involved with any of this consulted a marine biologist with a rudimentary understanding of coral
Hmm.
> Stephen Palumbi:
Jane and Marshall Steel Jr. Professor of Marine Sciences, Professor of Oceans and of Biology
You sure he doesnt have even a rudimentary understanding of coral? Did you read the paper? I'm going to assume the marine biologist publishing papers has at least some idea on corals, unless give a good reason to doubt it.
kakacik 7 hours ago [-]
of course he didnt read it, last sentence says it all
dcrazy 17 hours ago [-]
I remember hearing that the concern with our best techniques for rescuing coral reefs is that they would create a monoculture, and monocultures tend to be very susceptible to specific diseases.
solenne 11 hours ago [-]
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velaislands 11 hours ago [-]
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alexx-devv 12 hours ago [-]
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socraticnoise 18 hours ago [-]
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chiefwilsion 18 hours ago [-]
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asjkff 18 hours ago [-]
Could this also, have anything to do with, Nikola Tesla's resonance theory on dark matter and consciousness, in play in living matter?
More intelligent individuals should look more into this field.
tcdent 18 hours ago [-]
I'm all about the concepts you're presenting, but care to elaborate on how you think the corals relate?
asjkff 18 hours ago [-]
Disclaimer: I am still finding my way in life, so take this theory with a grain of salt.
New age movement, claim everything on earth is actually a hologram of the universe, experiencing itself.
So perhaps, just being in close proximity with another coral, the hologram frequency was now more in tuned.
rbn3 17 hours ago [-]
Since you mentioned you’re still finding your way in life: please be aware that the appeal of a lot of new age and „woo“ is that the act of noticing a pattern in nature, that feeling of „aaah NOW it makes sense“ is inherently pleasant and can become something you chase like a drug. These frameworks or schools of thought can provide a steady source of that feeling without necessarily being tethered to reality at all. Kind of like acid - very fun at times but catastrophic if you make it a core part of your identity.
hmokiguess 16 hours ago [-]
Well said, I have found myself in this place before in life and it can be quite dangerous
jakzurr 11 hours ago [-]
Perhaps that explains my "amazing" (well, occasionally) dreams. TG it's not every night.
Terr_ 15 hours ago [-]
Slightly Related: Beware any community which insists you show "loyalty" by doing things that burn-bridges so that nobody else will be your friend. Trapping you is how cults and abusive-relationships work.
hmokiguess 18 hours ago [-]
Why would the frequency of the healthy one win over the frequency of the non-healthy one though? I assume both would have their own frequencies, are you implying there's an order or tendency across frequencies?
asjkff 18 hours ago [-]
Same reason, stem cells repair damage body cells, I guess.
I am just glad coral can repair themselves.
Thumbs up to the researcher.
hmokiguess 18 hours ago [-]
I am just trying to understand your ideas and riff on them
Cells are complex organisms and contain programming in their nature so we can more easily trace and understand its reasons
A frequency is something a lot more raw than a cell
asjkff 18 hours ago [-]
I will repeat this for the last time. I am not an expert in the field.
"programming in their nature" means they have a range of frequency, like a radio? perharps.
Nevertheless, thumbs up to the researcher. Positive vibes.
willy_k 16 hours ago [-]
My interpretation is “Programming in their nature” -> their being, meaning the molecular structure that defines them, is a program, a complex program, one executed by the interpreter that is physics.
hmokiguess 16 hours ago [-]
I'm not quite following your defensive style of writing. What's up with that?
Do you believe only experts can contribute to discussions and ideas? Are you afraid of sounding "dumb"?
No question/idea is stupid and it's okay to be wrong or to learn something by putting yourself out there!
lovemenot 15 hours ago [-]
Not the person you are replying to. I guess they feel somewhat humiliated. There can sometimes be a fine line between scientific curiosity and the appearance of bullying. Common courtesy suggests we should back off whenever we feel that might be applicable.
hmokiguess 14 hours ago [-]
I was asking with the intent to make them comfortable though I get your point
willy_k 13 hours ago [-]
As an ex-prefacer, imo it’s a hedge against the nudging recognition that the thought being hedged is based on a pyramid of iffy connections (usually more word-of-mouth type “science”), rather than an articulable, concrete a->b->c.
hmokiguess 13 hours ago [-]
ngl, I did not understand what you said
willy_k 13 hours ago [-]
Edited, is that clearer?
hmokiguess 12 hours ago [-]
I think so though not sure I get your point with that
Do you mean to say that pseudoscience topics are perceived negatively?
willy_k 7 hours ago [-]
No.
willy_k 16 hours ago [-]
You might be interested in Catholic theology + philosophy. It takes a LOT of background, and a lot of time to accumulate it, but you clearly have some already, and once you get comfortable with reframing terms that have a lot of societal baggage attached to simpler, honest understandings (for example, God, as a sky dude vs the universe as a mind), you can go so far.
aappleby 18 hours ago [-]
No. Tesla's resonance theory has nothing to do with dark matter, consciousness, or living matter.
patmorgan23 17 hours ago [-]
No that's ridiculous woo woo. It's just that some of the symbiotic algae from the healthy coral transfer over to feed and revive the sick coral.
Bleaching is actually due to the coral expelling those algae. Bleached corals are not dead, and remarkably they can not only let the algae in again but can also select a different algae species to cultivate (changing colour in the process)!.
This is thought to be a deliberate survival strategy to optimize the species of algae under different conditions (Adaptive Bleaching Hypothesis).
Bleaching is caused by the same stressors (like high temperature) which kill coral, but bleaching itself is not death of the coral.
My open questions would be:
1. What's the consequence of corals expelling algae?
2. Why does heat make corals expel algae?
Impressive that corals have such a survival mechanism. But hopeless if no other species of algae can enter another symbiotic relationship with them?
TLDR Yes but it's complicated. There are more suitable algae species but AFAIK coral under heat stress will still often expel the algae even if the algae isn't the one stressing the coral. So you have to essentially breed a more tolerant coral and then provide the algae.
Now luckily there do exist more heat tolerant coral and algae species living alongside each other. Unfortunately those species are located in the Persian Gulf/inside the Strait of Hormuz so they are regularly subject to added stressors from Oil/NG extraction, military conflicts, and waste dumping. And of course their location makes research on them/collaboration between research institutions complicated.
And it's not like you can just transplant these coral somewhere else and they'll live. They are adapted to their environment and that environment plays a part in their heat tolerance as well. But research on these coral ecosystems will likely shed a light on how to help other coral species to adapt and evolve.
Maybe the pharmaceutical industry can target a new market here...
So more CO2 in air = more CO2 in the water = lower PH in the ocean. I don't know the details but the more acidic water messes with the chemical processes that corals and other aquatic life depend on.
Due to the coral or due to the algae? Put another way, could we engineer UV resistance into the algae?
And so does the coral!
If a species of algae cannot handle high temperatures without generating chemicals like hydrogen peroxide which trigger the bleaching, then that species is ejected sooner and more frequently during warmer months, creating selective pressure for species that can.
To survive these conditions without getting ejected, the algae need to essentially run their photosynthesis process more slowly. They produce less chlorophyll per cell and create sacrificial 'photoprotective carotenoid pigments' which act like sunscreen and dissipate that potential sunlight energy as useless heat (coral has a few tricks too fluorescent proteins).
So the coral is actually in a delicate balancing act, selecting the most aggressive/productive algae which won't also try to kill it during summer. Corals will learn to be more conservative in their selection and algae will get more conservative themselves. We want this process to happen quickly enough so that we don't lose coral coverage and diversity in the coming decades / centuries, but we can be confident that on longer timescales the coral will adapt, assuming we don't get runaway warming.
https://www.npr.org/2024/04/17/1245085914/coral-reefs-bleach...
I'm so glad we have space rockets, flying cars and drone warfare...but I'd trade it all in for the reef to come back.
It's really just climate change. (Ocean warming is what causes bleaching.) Luckily, since the 80s we've had the technology to generate energy without releasing greenhouse gases. I wish more people knew about the harms caused by climate change because maybe if they were they'd be more interested in preventing them.
Yes, for many swaths and types of traditional agriculture and fishing it will be doom, but this conversation isn’t about local ecosystem but global food production vs population growth.
Food production was never a problem, supply and management is.
Until the Boomers finish ageing out and GenZ/A grow up to take the reins, the status quo stays
https://en.wikipedia.org/wiki/2025_New_York_City_mayoral_ele...
The power is yours.
Longer. Nuclear power tech was pretty good in the 60s (outside of the Soviet Union).
We just aren’t applying it fast enough for terrible & lazy reasons.
If only we were just debating why/who! Thanks to Social Media, filter bubbles, and “alternative facts,” we are back to debating whether it is actually even happening or not.
https://www.aims.gov.au/monitoring-great-barrier-reef/gbr-co...
This doesn't mean everything is fine, but it is doing way better than 2017.
Bleaching is not death of the coral, it is the expulsion of algae (typically in high temperatures). The coral can find a different species of algae, or the algae can return once temperatures drop.
There are corals living in regions of the ocean with different temperatures, so it is not that high temperature alone would kill all coral, but populations adapted to a given region (like north vs south GBR) are being affected by the speed of the changes.
Was in central GBR this year, can't say I'm super impressed but not sure how I should set my expectation
Typically the biggest change in diversity is due to cyclones which kill of the delicate and fast-growing corals like staghorns, which are also the fastest to grow back.
Because it’s nice to say these things in Sentiment, until you see past the naïveté to see human lives are what cause the wear and extraction on the environment. Humans live, eat, shit in, consume their environment for their lives.
How many humans are worth restoring the reef for you? And would you sacrifice your own friends and family?
You don’t need to sacrifice humans, you need humans to behave different. Do you know the energy requirements that go into war? The chemical, carbon and physical changes to the ocean from all we do?
We don’t need to kill more humans, we just need to stop being fucking idiots for a few hundred years.
This is the only planet we'll ever meaningfully have and we're killing it for "eternal" growth.
Thank you for your attention to this matter.
Anecdotally I was also there around 2006/2007 - somewhere near Cairns - and the part I saw was esentially dead, not just bleached. It really depends on where you go.
Btw since many in this thread mention ocean warming I want to mention that after having followed this for many years, and observed changes first hand in different parts of the world, my conclusion is that the main factor is direct human influence, not something more abstract like global warming. Especially water pollution as a result of agriculture, unchecked population growth and tourism.
One of the problems is all the people who say they love the reefs want to go where the reefs are still intact, after other parts have already been destroyed. Which then puts even more pressure on those last remaining healthy reef systems. Just talk to divers and listen to the exotic locations they travel to these days. I think many aren't even aware they're part of the problem. Or maybe they subconsciously shift the blame. Reefs are usually healthiest where there are no or very few people around.
The good news is you don't have to be an expert in geoscience to see the connection isn't as simplistic as many assume. Look at the data instead of having preconceived ideas. As an example, when you look at sea temperature data for many of the areas worst affected by coral death in recent decades (Maldives, Seychelles, parts of the Caribbean) you will see they have only seen moderate or even no temperature rise, while many other regions have seen more dramatic rise in local sea temperature and yet have healthier coral.
The fact that the GBR in Australia has seen temperature rise and coral death does not necessarily mean that there is a direct causation or even that it's the main cause. Have you considered other causes play a role?
Edit - The article makes Okkef's point, I just missed it.
> Fragments from different species and even different animals of the same species did not fuse together, and so did not nurse the bleached piece back to health.
I find it strange that the first observance of this was a year ago, especially given how rapidly it occurs. Coral bleaching has probably been studied since the 80s when major events started being noticed. If Stephen Palumbi is reading this, I would love to read why you think it took so long.
edit: I would wager this is only the first published observance.
Conways game of life.
Only if you've never talked to anyone remotely involved with propagating coral, including those in the saltwater fish-tank community!
https://news.ycombinator.com/newsguidelines.html
This is literal, partly how the guy down the street, at your local saltwater aquarium shop, keeps supply in stock. This is grafting/cloning from fragments, boring coral propagation, widely done for many decades. It only works very quickly for some coral though (there are over 1000 known).
Nobody involved with any of this consulted a marine biologist with a rudimentary understanding of coral, or the guy propagating it for a living down the road.
How did I know this? I did a report on coral when I was a kid.
> Nobody involved with any of this consulted a marine biologist with a rudimentary understanding of coral
Hmm.
> Stephen Palumbi: Jane and Marshall Steel Jr. Professor of Marine Sciences, Professor of Oceans and of Biology
https://profiles.stanford.edu/stephen-palumbi?releaseVersion...
You sure he doesnt have even a rudimentary understanding of coral? Did you read the paper? I'm going to assume the marine biologist publishing papers has at least some idea on corals, unless give a good reason to doubt it.
More intelligent individuals should look more into this field.
New age movement, claim everything on earth is actually a hologram of the universe, experiencing itself.
So perhaps, just being in close proximity with another coral, the hologram frequency was now more in tuned.
I am just glad coral can repair themselves.
Thumbs up to the researcher.
Cells are complex organisms and contain programming in their nature so we can more easily trace and understand its reasons
A frequency is something a lot more raw than a cell
"programming in their nature" means they have a range of frequency, like a radio? perharps.
Nevertheless, thumbs up to the researcher. Positive vibes.
Do you believe only experts can contribute to discussions and ideas? Are you afraid of sounding "dumb"?
No question/idea is stupid and it's okay to be wrong or to learn something by putting yourself out there!
Do you mean to say that pseudoscience topics are perceived negatively?