It's amazing the impact that the reintroduction has had. On a recent winter trip there I also learned that the reintroduction literally moved rivers [1]:
- Elk quit loitering along streams, so willow and cottonwood shot up, anchoring soil and narrowing channels.
- The new woody growth gave beavers lumber; their colonies jumped from one in 1996 to a dozen within fifteen years, raising water tables and rebuilding wetlands.
- With healthier riparian zones came deeper pools, colder water, and a surge in native trout and song-bird nests.
I’ve always found the idea of “restoring” ecosystems a bit philosophically tricky. When we say that reintroducing wolves led to ecological improvements, what’s our reference point? Are we comparing it to Yellowstone 100 years ago? 500? Pre-human settlement?
Ecological baselines are inherently arbitrary—there’s no objectively “correct” state of nature to return to. The systems we call degraded are often just different, not necessarily worse. So when we talk about progress in this context, we’re really measuring against a value-laden idea of what we think nature should look like, not some neutral truth.
That doesn’t mean rewilding is bad—but I do think we should acknowledge that we’re shaping nature to fit human values, not restoring it to some pure, original state.
sdenton4 55 minutes ago [-]
Instead of thinking of this as a benefit of wolves (specifically), you can view it as an advantage of having something in their ecological niche. In this case, the niche is 'apex predator.' It's a niche which is repeated across pretty much every ecosystem. They keep populations of their prey species down, preventing overpopulation and the many indirect problems that come with it.
Perhaps without an apex predator the prey species would evolve out of the overpopulation problem eventually. However, species that evolve with a predator tend to reproduce more quickly, which helps avoid being completely wiped out by the predator - when the population constraint impose by the predator is removed, the prey population explodes, leading to particularly pronounced problems.
(Perhaps if we had to contend with some homo-vampirus, we wouldn't have global climate change...)
Overall, humans already interfered in the shape of the ecosystem by removing wolves. You're correct that there's no objective 'correct' state for an ecosystem. But it is worthwhile to help balance ecosystems, especially when they have been unbalanced by our own interventions. Without restoration work, we're headed to a world with humans, livestock, and the few species that manage to live on our margins.
sghiassy 42 minutes ago [-]
That’s a strong point. Thanks for the thought
FergusArgyll 1 hours ago [-]
I think one approach would be; restoring it to a known stable equilibrium. Meaning, if without wolves things continue to deteriorate and clearly hasn't reached a stable equilibrium but you know that with them things were stable over some long term period then you should reintroduce them
zomiaen 55 minutes ago [-]
I wouldn't say pre-human settlement, since Natives were in these areas for many years, but they didn't have the desire to mass hunt wolves (and culturally, would not do so). So pre-US colonialism, perhaps.
Philosophically though you're correct- humans very easily see themselves as "apart" from the environment, when really we're just another mammal doing our thing. We are nature as much as we are in it, even for all of our tools and manufacturing.
BurningFrog 37 minutes ago [-]
One point I rarely see made:
When you "destroy" an ecosystem, a new one will take its place. The remaining animals and plants will converge on a new balanced state.
The ecosystems we admire today are often that new balance after humans destroyed the natural one.
chomp 48 seconds ago [-]
That’s because it’s a bad point. An ecosystem can collapse for multiple reasons, e.g. collapse due pollution will not create a thriving ecosystem.
In almost all cases, when a collapsed ecosystem reaches homeostasis again, the result is a more fragile and less diverse balance than what was there previously.
13 minutes ago [-]
Misdicorl 19 minutes ago [-]
One way to measure this that isn't moral judgements is the ecological depth of an environment. If one part of the system is destroyed (e.g. a blight on plant A) how devastating to the rest of the system will that be?
One of the hallmarks of human engineered environments is how shallow and fragile they are. Changes, like the reintroduction of wolves, are "good" because they give us deeper and more resilient environments
subscribed 1 hours ago [-]
I often hear this argument, "oh, but how far can we possibly go??! But deer are pretty?!", especially from farmers and grouse shooting estates here in the UK.
It's wild, because it's so easy to measure and asses: an ecological desert, dying ecosystem, rich in single overgrazing specie is unequivocally bad.
Rich, lush ecosystems sustaining great biodiversity and ecologically unique features (eg chalk streams or temperate rainforests in the UK) are good. Killing everything for the sake of one specie: Bad.
Indeed. For the UK in particular you clearly can't have "What it was without people" because that's far too long ago, there aren't records so we'd only be guessing. The New Forest - near me - was built about a thousand years ago, it's not "supposed" to be like that, it was built on purpose and it takes considerable maintenance to keep it that way, felling trees, managing trails, maintaining bridges and so on. Things like "The pigs eat acorns, that way the ponies don't eat the acorns and die†" could not possibly work without humans managing the forest. Left to their own devices the pigs would destroy that forest in a few years, and then the ponies die too, humans allow pigs out for a set period, to eat lots of acorns, then bring them all back by law.
We could try to build what was there before the forest, but it would be extremely disruptive to all the people who live there, and what for? The Forest isn't very useful today, but it's pretty and we know it's stable, and it has some uses, we grow some trees there, we farm some pigs and ponies, tourists come to see it - there are many worse options.
† Acorns are poisonous. Don't eat acorns without proper preparation. Unless you're a pig or a squirrel or something. In which case how are you reading this note?
doctorpangloss 40 minutes ago [-]
> we’re shaping nature to fit human values
Biodiversity is a good measure of ecosystem health, no? Is it really a human value?
quotemstr 1 hours ago [-]
Another example: mosquitos. We can and should drive them to extinction. The species that feed on humans are nowhere food-web-critical. It's an arbitrary and wrong judgement that we should preserve mosquitos just because they happened to evolve with us. So what if eradicating them would be unnatural? So what if it would technically be a reduction in biodiversity? Not everything natural is good or optimal.
kurthr 38 minutes ago [-]
Mosquito introduction is an historical event (1820) in Hawaii (New Zealand, the Caribbean, etc). This devastated local bird populations driving many to extinction and halving the avian population in approximately a year due to virus propagation. The death of the birds led to less seed dispersal, loss of forest, and increased susceptibility to invasive plants.
Some are ancient, but have adapted to thrive in some human environments, but have spread well past their original areas by colonialism, slave trade, shipping, and war. The idea that modern mosquitoes are some "natural" ecosystem element is pretty funny. Perhaps they have destroyed the habitat that once existed and driven out competing species which once fit into the niche, but they are in most places relatively modern in ways other biting flies are not. The growing effects of malaria are not only on humans, but other animals including both chimps and reptiles as well.
Anopheles/Aedes/Culex mosquitos are the grey goo of insects, driving other flies, midges, and even mosquitos (which local fish and larval predators have evolved with) to exinction. Treat them like the infection they are.
BurningFrog 44 minutes ago [-]
The interesting version of this is to exterminate the malaria carrying mosquito species. Only 40 of 3500 species can carry malaria. If we wipe them out, non malaria carrying species will likely take their place in the ecosystems.
250 million people have malaria, and 600k, mostly children die from it yearly.
And yet, I see a lot more people defending the mosquitos than the humans.
ChrisMarshallNY 1 hours ago [-]
I remember when it was announced that smallpox was eradicated (Yeah, I'm old enough to have a smallpox vaccination scar).
I remember someone moaning about how we had driven a species to extinction.
We're a funny lot, really. I've learned not to take us too seriously; especially the folks that take themselves very seriously.
tialaramex 12 minutes ago [-]
It is questionable whether smallpox is alive and so whether it can go extinct. If in some sense it can go extinct it seems both the Americans and Russians are determined to keep it alive "just in case".
Nobody was much concerned when we eradicated another infectious virus. Unlike Smallpox there was no "military rationale" for keeping copies on ice, so Rinderpest is gone. It appears that its close human relation, Measles, will be around for a long time though because "I don't believe in facts" trumps "My child has died of a preventable disease". So that's certainly evidence for you're "We're a funny lot" theory.
profsummergig 1 hours ago [-]
You seem very well-informed on the matter.
xhkkffbf 1 hours ago [-]
I've got to agree. I like Aspen trees, but I like Elk better.
It sure sounds like we're just choosing the species we like. It's like a big walled garden.
zomiaen 53 minutes ago [-]
The Aspen trees provide ecosystem benefits to animals other than Elk-- birds, etc. Shorter grasses allow smaller animals to live and hide.
It's not choosing species we like as much as that there was previously an equilibrium all ecosystems trend towards, and our influence (killing the wolves) lead to significant ecosystem imbalances that hurt more than just wolves.
sushibowl 3 hours ago [-]
As far as I know, the science on this is far from settled. There is no consensus and the evidence in favor of a trophic cascade in Yellowstone came predominantly from two studies done by the same team/person. Later studies failed to replicate findings.
Do wolves fix ecosystems? CSU study debunks claims about Yellowstone reintroduction
That looks like a quite biased interpretation of these studies. Direct quotes:
> The average height of willows in fenced and dammed plots 20 years after the initiation of the experiment exceeded 350 cm, while the height in controls averaged less than 180 cm
> This suggests that well watered plants could tolerate relatively heavy browsing. It also shows that the absence of engineering by beavers suppressed willow growth to a similar extent as did browsing
They posit that the growth in control groups not matching the fenced areas is evidence of wolves reintroduction not having the effects they are said to have. It is a pretty unconvincing argument since there are so many other variables involved. They also prove that IF the wolves have indirectly lead to either the return of beaver dams, or reduced elk browsing, there is undoubtedly an impact in tree growth, which is a positive result regardless.
Their theory that things will never return to their original state, and instead will settle into a new alternate equilibrium is probably correct, but does not seem like the definitive blow to the wolf theory that it’s made out to be.
ChuckMcM 3 hours ago [-]
Both links are paywalled so I can't comment on what they say (positive or negative). That said, I did attend an interesting lecture about systems that looks a bit at the Yellowstone as a cautionary tale about extrapolating how a system works from observational data. Basically it came down to there are secondary and tertiary effects from systems variables that express visibly differently depending on both the magnitude of the system elements influence and the time where it it changes. Thus making "simple" conclusions like 'wolves did this' often insufficient to explain system behavior and sometimes outright incorrect.
However, the introduction of wolves did, incontrovertibly, add a system element that had not been present before. Exactly what that element was, and how it expressed is up for interpretation :-)
ForOldHack 2 hours ago [-]
Brilliant observation. Dynamic systems like this are rarely a cut-n-done. Like the study of ozone, with it's seven counter intuitive steps, it is all an evolving study.
It also proves the worth of just simple studies over a long period of time. Science used to do a lot of that, and it was very interesting, as many appear on hacker news, but now it seems that cut-n-done grab more popular news.
It also bears the question: what longitudinal studies are popular here besides this one, and retro computing?
TL;DR - the observed reduction of the elk herd correlated with wolf introduction, but also with an increase in cougars, grizzly bears, and even bison, all of which either reduce or compete with elk. Human hunting also added pressure, but that has been limited as the herd size reduced. It is complicated.
2 hours ago [-]
troupo 2 hours ago [-]
I also read it as "biodiversity is a good thing"
rr808 2 hours ago [-]
I talked to a local who was friends with ranchers who now lose stock to wolves. They hate it. Its an interesting use case of local control, is the greater good more important than the people who live there?
floatrock 18 minutes ago [-]
Or it's a reflection on is individualism really a thing when everything is actually interconnected?
"The greater good" is a bit abstract, and your framing suggests it's somehow separate from "the people who live there". A different framing of this question is should individuals be able to degrade ecosystem wealth in order to maximize their personal wealth?
This is the climate story in microcosm. We all know burning carbon is against the "greater good", but if we can pretend that our high-energy lifestyle is somehow independent and unconnected to the planetary ecological systems that support us, then of course, why shouldn't I mortgage my descendants' future for some toys today.
__MatrixMan__ 1 hours ago [-]
More important than their desire to continue doing business the way they're used to? I'd say so. You phrase it like we're feeding them to the wolves.
It's not just predators vs livestock, there are a bunch of things that we didn't used to understand about ecosystems that we do now. The societal cost of letting people displace or kill wild animals with abandon is quite high.
Zoonotic diseases are the first to come to mind. How many preventable cases of Plague or Lyme disease is that livestock worth to us?
perlgeek 1 hours ago [-]
Losing stock to wolves and bears was why we used to have shepherds, shepherd dogs, fences etc, at least in Europe.
Eradicating predators created a very convenient, intermittent period where this was less of a necessity, but it also had quite negative externalities.
So the question isn't "is the greater good more important than the people who live there?", but more "is the greater good more important than the convenience of some people who live there?"
This is a question we have to ask ourselves a lot; nobody wants to live near a landfill, a prison, a sewage treatment plant etc, and yet we want them for the greater good.
fundad 30 minutes ago [-]
Convenience, lifestyle and the ability to hire fewer people (keeping more money). If it doesn’t make money after expenses, get a second or third job like most artisans.
inahga 22 minutes ago [-]
Colorado, at least, provides several resources for minimizing and compensating wolf depredation.
Cursory search shows that not just Colorado does this.
mykowebhn 2 hours ago [-]
Your question rephrased from an Indigenous People's perspective:
"is the greater good more important than the original people who lived there?"
30 minutes ago [-]
2 hours ago [-]
wpm 36 minutes ago [-]
Yes. They should nut up and get over it.
spicyusername 34 minutes ago [-]
Yes.
jeffbee 2 hours ago [-]
Welfare ranchers grazing on BLM land? Yes.
carlosjobim 1 hours ago [-]
I think it's very obvious that it is more important what people like me who sit on the other side of the world thinks about wolves in Yellowstone, than what the people living there think.
kingkawn 2 hours ago [-]
Yes
djoldman 3 hours ago [-]
The subtitle explains:
"Gray wolves were reintroduced ... to help control the numbers of elk that were eating young trees"
pcmaffey 2 hours ago [-]
There’s a raging battle to decimate wolf populations in Montana. I’d encourage any and all to speak up.
> Montana Fish, Wildlife and Parks (MTFWP) is proposing new, despicable wolf hunting regulations that could allow up to 500 wolves to be killed. This would increase the number of wolves that can be killed next season by 50 percent, nearly half the state’s entire wolf population. MTFWP is also pushing expanded hunting and trapping rules, including allowing hunters to kill up to 30 wolves per person.
> This proposal comes despite livestock losses remaining near historic lows, with only 35 confirmed cattle deaths in 2024, and a significant drop in the number of wolves killed due to livestock conflicts. It is also worth noting that revenue from wolf hunting licenses is among the lowest ever recorded – which helps explain why these expanded rules are less about science and more about politics, profit, and desperation.
> The Montana Fish and Wildlife Commission will vote on this proposal at its next meeting on August 21. In the meantime, public comments are open through August 4, and wolves need your voice. In your comment, consider including the following:
- There is no scientific or ethical reason to kill this many wolves.
- Wolves pose no significant threat to humans.
- Wolves help maintain healthy prey populations by targeting the weak or sick, which may help control the spread of chronic wasting disease in elk and deer.
- Legal hunting can increase poaching.
- Traps and snares are cruel, outdated, and often harm pets and endangered species.
thom 3 hours ago [-]
Not sure where opinion ended up on this, are there dissenting voices still?
Has no one considered the possibility that the aspen trees are eating the wolves to grow strong? I mean, we know that the decline of pirates causes global warming.
We also know that dog predation of frisbees is a real problem for healthy disc populations.
owenthejumper 4 hours ago [-]
It's incredible how much damage we have done to ourselves in the past 250 years, and how much effort do we now need to spend to undo that damage
throw83944i888 2 hours ago [-]
> how much effort do we now need to spend to undo that
Moving a few wolfs, I would hardly call that effort! Stopping regulations and allowing some hunters in Yellowstone would have similar effects!
It is more like morons, who do not understand biology are in goverment! Overprotection allowed elk overpopulation!
Incipient 2 hours ago [-]
For clarification, I wouldn't say stopping regulation. It should be "updating regulation" - either increasing hunt quotas, or having an 'open season' time.
derdi 31 minutes ago [-]
Oh, hunters. "Look, those herbivores are clearly evil. Luckily, we can propose a gun-based solution! All sustainable, of course."
Then in a few years it will be "Look, we hunted the herbivores sustainably, but their numbers keep plummeting. That's caused by those evil carnivores. Luckily, we can propose a gun-based solution!"
hagbard_c 4 hours ago [-]
It's incredible how much good we have done to ourselves in the past 250 years, and how much good we can do in the now and the future.
jebarker 3 hours ago [-]
The question is how much of that power will we use to do good for the rest of the species on the planet? I’ve just finished reading “Not the end of the world” and found it to be an informative and balanced discussion on the topic that recognizes the vast benefits of human development (to humans), the cost to the rest of the planet and the progress we’ve made in the past 50 years in undoing some of the harm. This is a nuanced topic and deserves that kind of debate.
alexey-salmin 41 minutes ago [-]
Which exact species do you want to help? Ticks, mosquitos and anthrax or more like birds, trees and elk? Where do you draw the line?
jebarker 28 minutes ago [-]
What a strange question. As a starter I’d like to see us help trees, coral, other primates and megafauna as much as possible. The former because they support so much other biodiversity and the latter because they’re nice to have in the world. Generally speaking though I favor sustainability where that means continuing to improve the quality of life for humans, especially those at the bottom of the socio-economic ladder, whilst trying to minimize the number of other species we drive to extinction. Again, nuance is key here - I don’t think my inability to enumerate every species worthy of help means that we should just dismiss the effort to help other species.
mykowebhn 1 hours ago [-]
These replies that simply restate a previous comment by inverting its meaning are really starting to annoy me. They're neither witty nor intelligent. Just lazy and annoying.
Waiting for someone to reply to this doing exactly this
alexey-salmin 37 minutes ago [-]
People assuming that last 250 years were predominantly harm are annoying. The human race is thriving by every objective metric of nature: population, lifespan, dispensable energy per capita.
rgreek42 3 hours ago [-]
Surely this is the best of all possible worlds, Dr. Pangloss.
quickthrowman 3 hours ago [-]
Are you really promoting the philosophy of Leibnizian Optimism in 2025?
I suggest reading Candide by Voltaire, first published 266 years as a critique to the philosophy you are currently espousing.
bmacho 2 hours ago [-]
People: "If God, then why bad?"[0]
Leibniz: "God and bad can coexist. E.g. we live in the best possible world."[1]
Voltaire: "Here's a depiction of some fictional bad."
I don't think Voltaire engaged meaningfully with Leibniz's argument. (I think that Leibniz is simply right tho, in the mathematical sense, so there isn't much room for Voltaire anyway.)
I suspect that "being right in the mathematical sense" is the very thing that Voltaire was lampooning.
narcraft 2 hours ago [-]
We've come a long way in those 266 years: global population 10x'd, meanwhile the share of the population living in extreme poverty went from over 80% to nearly 8%, so not all optimism was misguided. Also there's a lot of room between despair and a Panglossian caricature, and I don't think acknowledging that a lot of good has happened in the past (and not necessarily suggesting it was all inevitable or automatic) rises to that caricature.
thfuran 2 hours ago [-]
I don’t really see how you got there from what they actually said.
mc32 3 hours ago [-]
It’s is! Just in medicine alone. And then economically, as well as justice. From 98% of the people living in abject poverty, no pairs of shoes, two changes of clothes, selling off relatives for money, dying from simple infections… to where we are today. It’s like the glory days of Rome but much better.
ysavir 3 hours ago [-]
Downvoted as this comment feels like it's trying to be witty/upshowing the parent comment without actually engaging with it or offering anything of substance. If the comment was along the lines of "yes, but we've also done a lot of good, let's reflect on both", great. But that's not what it was. Instead it feels like a statement that's trying to argue with the parent comment despite the parent comment never saying we haven't done any good.
bluGill 3 hours ago [-]
> Please respond to the strongest plausible interpretation of what someone says, not a weaker one that's easier to criticize. Assume good faith.
regaurdless of what was intended your downvote and reply shows a lack of good faith.
ysavir 3 hours ago [-]
It wasn't a criticism of what they were saying (a point on which I agree with that poster), but whether the comment itself was contributing to the discussion or not. It was a very low-effort comment that offered no reflection on what the parent said, doesn't tie into the original post, and lacks depth towards its own point.
declan_roberts 2 hours ago [-]
This is great news! Why doesn't fish and game just increase the number of elk tags they sell? There are multiple ways to reduce the elk population.
tossandthrow 2 hours ago [-]
Based on another commenter it appears that it is not merely about the number of elk, but likely also how they act.
But is see This has a human imperialist reaction: why don't we just micro manage everything!
stevenwoo 2 hours ago [-]
There are other studies that show that reintroduction of wolves also appeared to lead to a decrease in coyotes and changed the populations and behaviors of other prey animals, in turn changing other plant populations. This particular headline does not indicate all the apparent changes. These second and third order effects are not things a state fish and game body would particularly care about until it was forced to by other arms of government.
ceejayoz 2 hours ago [-]
Humans hunt very differently than wolves. The impacts on elk behavior are thus potentially very different.
atentaten 4 hours ago [-]
How does returning wolves to ecosystem effect the mountain lion population? Can we balance things out or are we shuffling problems around?
jebarker 3 hours ago [-]
Im speculating, but mountain lions were probably doing fine before the early 1800s too so they likely just balance each other out naturally if there’s competition over the same prey. I doubt humans need to do anything.
searine 46 minutes ago [-]
Made possible by 1 grant from the Oregon State University Foundation.
cadamsdotcom 4 hours ago [-]
Yellowstone seems like one of the most resilient ecosystems we do science on, seems it can reorganize to respond to changes in species.
Can other ecosystems do this? Or is Yellowstone the only one?
__MatrixMan__ 2 hours ago [-]
A recent biology teacher of mine claims that military bases often contain ecosystems that are:
- intact enough to have quick bounce back behavior upon species reintroduction and
- small enough for you to have a good idea about which species are present
- come with a built-in control variable: the civilian space on the other side of the border represents what would have happened if we had let economics have its way with the land
Maybe you don't need quite that level of protection to see such effects, but generally you do need some. Throwing some wolves at a once-forest that's now half way to being a desert will not always save that forest.
kergonath 1 hours ago [-]
It is one of the better studied ones. What makes you think this sort of things does not happen elsewhere? Yellowstone has the advantage of being in the US, where there are a lot of people studying these things.
flkenosad 3 hours ago [-]
They should try it in nfld
ForOldHack 2 hours ago [-]
If I could pick 10 stories to follow every day on a HN dashboard, this would be first. It's really four or five stories in one.
arnon 2 hours ago [-]
Finally some good news today
incomingpain 4 days ago [-]
They only moved few dozen wolves, over 1000km from their homes, which is not going to have any significant consequences. Even today there's only about 100 wolves in the park?
2,200,000 acres, with 100 wolves.
Then they've made the claim that those 100 wolves in 2.2million acres has resulted in plants and fish returning? As opposed to their efforts doing nothing at all?
rustyconover 4 hours ago [-]
I'm not a biologist, but I grew up in West Yellowstone around the time wolves were reintroduced. Their return—and its impact—has been extensively studied by experts far more qualified than me.
That said, I believe wolves had a profound effect on the Yellowstone ecosystem, particularly on elk and deer populations. Before their reintroduction, those species had few natural predators beyond hunters, vehicles, bears, and the occasional mountain lion. The imbalance led to overgrazing and the spread of diseases like Chronic Wasting Disease (CWD) in elk.
williamdclt 4 hours ago [-]
> Then they've made the claim that those 100 wolves in 2.2million acres has resulted in plants and fish returning? As opposed to their efforts doing nothing at all?
They've studied it and came to these conclusions, yes. Have you studied it and come to different conclusions?
littlestymaar 4 hours ago [-]
You're responding to someone who believe that omnivorous animals don't exist[1], so you can assume that they will disregard whatever biologists say and trust their feelings rather than reality.
Insane how they spout out nonsense as fact. Cats are obligate carnivores. They eat protein. End of story. Please do not feed your cat vegetables.
plemer 4 hours ago [-]
While I find your counter argument vague, it did prompt me to dig in and find that human hunting is arguably still the bigger suppressor of elk population. However, that’s been going on since the ‘40s.
The reintroduction of wolves is associated with an immediate, steady, and durable decline in elk - i.e. pushed the ecosystem past an inflection point into a new equilibrium.
bhaak 3 hours ago [-]
It’s also possible that wolves hunt in a different way than humans, or different types (regarding age, gender, or health maybe) of elks.
It’s an interesting question and this could be empirically tested if human hunting would be slowly reduced.
scott_w 3 hours ago [-]
That’s a good point: hunters probably prefer strong elk but wolves prefer weak elk. I recall going to a walking with wolves experience in the Lake District where she explained that predators strengthen their prey by removing sick and those with genetic issues from the gene pool.
rustyconover 3 hours ago [-]
Yellowstone is a national park, you can’t hunt anything inside the park’s boundaries. Wolves can.
bhaak 3 hours ago [-]
Yellowstone park has a policy of natural regulation (since the 70s IIRC). The surrounding areas not necessarily.
specialist 3 hours ago [-]
IIRC:
Without risk of harm, elk and deer linger near water. This tramples the shoreline. And they love eating noshing on (aspen) saplings. Over time, the shorelines become barren.
With the reintroduction of wolves, shorelines are no longer safe havens. Aspens have returned. With aspens, song birds have returned. Trees shade the water (eg streams), so fish are happier. Trees stabilize the top soil, reducing erosion, allows other plants to become reestablished.
I dimly recall beavers returned too.
--
Aha. I was mostly right (or hallucinating). Here's perplexity link for "impact of return of wolves to yellowstone".
I learned about the birds returning because of the wolves while volunteering at Audubon. That linked summary doesn't go into those details.
--
Update: I should've read the OC first. My bad. TIL: (too many) bison also negatively impact riverbanks. I had thought (misremembered) that overall impact of bison was positive. Does Yellowstone need more cougars?
laughingcurve 4 hours ago [-]
“I do not like the results!” Or “The result does not make sense to me!” are not valid criticisms of science. They are arguments made from emotion. And in your case, based on your account history, it’s clearly something political for you. I would encourage you to write that kind of commentary in a more appropriate venue. Like the bathroom stall of your local truck stop. Just not here.
scott_w 3 hours ago [-]
While I didn’t like the tone of OP I do understand where they’re coming from. Assuming what they’re saying is correct, it’s a valid question where explaining the mechanism is a solid response.
I’ll say that I’ve not read the article so if it’s in the article then I would rather you just point to that, rather than make this response.
mousethatroared 4 hours ago [-]
But it's perfectly valid to question results that don't make sense, and the role of the supposed expert is to explain why it does.
After all, off in a democracy an expert expects to be paid by taxpayers to make decisions that affect the taxpayer the expert should be, at the very least, be able to explain himself in an intelligible manner.
Thats the bare minimum of expectations. I also expect the taxpayer funded expert to provided full access to his data, notes and analysis software.
Im considered an expert in thermodynamics, materials science and E&M. The people that pay me routinely don't understand what I'm working on, but they expect me to explain myself.
sarchertech 3 hours ago [-]
>they expect me to explain themselves
But the experts did explain themselves. They’ve published numerous studies on how small wolf populations impact the larger ecosystem.
It’s not even that hard to understand. Yes Yellowstone is large, but there are a finite number of elk herds and the wolves move to follow and prey upon the elk herds.
Wolf packs can kill 20 elk per year per wolf, there are 120 wolves inside the park and 500 immediately around the park wandering inside it and killing elk that wander outside.
At the peak there were 18k elk in the park and now the numbers are down to 2000. There’s plenty of evidence that the decline is a direct result of the wolves.
Controlling elk population has tons of 2nd and 3rd order effects which have also been well documented.
ForOldHack 2 hours ago [-]
Here on HN we are looking at the effects and beliefs of the people reading the studies? What effect does this have on us?
Many downvoted comments etc. ( and much thanks for explaining the population numbers!)
asacrowflies 4 hours ago [-]
The science is pretty clear on this Im not sure what you exactly are criticizing other than you don't like the vibes or vaguely incredulous? It doesn't take many wolves to change the behavior of nearly every herbivore they prey upon. Which then changes the river bank erosion. Which causes hundreds of more species to change behavior.... Trophic Cascades are not really up for debate .
4 hours ago [-]
ForOldHack 2 hours ago [-]
No one here used apex predictor, but many described it. The science is clear that we need to study this more, much more. We only know a brief glimpse on terms of geologic time.
The effect on quaking aspens in Pardo is also something we need to study long term. Are the two related?
- Elk quit loitering along streams, so willow and cottonwood shot up, anchoring soil and narrowing channels.
- The new woody growth gave beavers lumber; their colonies jumped from one in 1996 to a dozen within fifteen years, raising water tables and rebuilding wetlands.
- With healthier riparian zones came deeper pools, colder water, and a surge in native trout and song-bird nests.
[1] https://phys.org/news/2025-02-predators-ecosystems-yellowsto...
Ecological baselines are inherently arbitrary—there’s no objectively “correct” state of nature to return to. The systems we call degraded are often just different, not necessarily worse. So when we talk about progress in this context, we’re really measuring against a value-laden idea of what we think nature should look like, not some neutral truth.
That doesn’t mean rewilding is bad—but I do think we should acknowledge that we’re shaping nature to fit human values, not restoring it to some pure, original state.
Perhaps without an apex predator the prey species would evolve out of the overpopulation problem eventually. However, species that evolve with a predator tend to reproduce more quickly, which helps avoid being completely wiped out by the predator - when the population constraint impose by the predator is removed, the prey population explodes, leading to particularly pronounced problems.
(Perhaps if we had to contend with some homo-vampirus, we wouldn't have global climate change...)
Overall, humans already interfered in the shape of the ecosystem by removing wolves. You're correct that there's no objective 'correct' state for an ecosystem. But it is worthwhile to help balance ecosystems, especially when they have been unbalanced by our own interventions. Without restoration work, we're headed to a world with humans, livestock, and the few species that manage to live on our margins.
Philosophically though you're correct- humans very easily see themselves as "apart" from the environment, when really we're just another mammal doing our thing. We are nature as much as we are in it, even for all of our tools and manufacturing.
When you "destroy" an ecosystem, a new one will take its place. The remaining animals and plants will converge on a new balanced state.
The ecosystems we admire today are often that new balance after humans destroyed the natural one.
In almost all cases, when a collapsed ecosystem reaches homeostasis again, the result is a more fragile and less diverse balance than what was there previously.
One of the hallmarks of human engineered environments is how shallow and fragile they are. Changes, like the reintroduction of wolves, are "good" because they give us deeper and more resilient environments
It's wild, because it's so easy to measure and asses: an ecological desert, dying ecosystem, rich in single overgrazing specie is unequivocally bad.
Rich, lush ecosystems sustaining great biodiversity and ecologically unique features (eg chalk streams or temperate rainforests in the UK) are good. Killing everything for the sake of one specie: Bad.
More on that if your position is honest: https://www.monbiot.com/2025/05/12/the-commoner-kings/
We could try to build what was there before the forest, but it would be extremely disruptive to all the people who live there, and what for? The Forest isn't very useful today, but it's pretty and we know it's stable, and it has some uses, we grow some trees there, we farm some pigs and ponies, tourists come to see it - there are many worse options.
† Acorns are poisonous. Don't eat acorns without proper preparation. Unless you're a pig or a squirrel or something. In which case how are you reading this note?
Biodiversity is a good measure of ecosystem health, no? Is it really a human value?
Some are ancient, but have adapted to thrive in some human environments, but have spread well past their original areas by colonialism, slave trade, shipping, and war. The idea that modern mosquitoes are some "natural" ecosystem element is pretty funny. Perhaps they have destroyed the habitat that once existed and driven out competing species which once fit into the niche, but they are in most places relatively modern in ways other biting flies are not. The growing effects of malaria are not only on humans, but other animals including both chimps and reptiles as well.
Anopheles/Aedes/Culex mosquitos are the grey goo of insects, driving other flies, midges, and even mosquitos (which local fish and larval predators have evolved with) to exinction. Treat them like the infection they are.
250 million people have malaria, and 600k, mostly children die from it yearly.
And yet, I see a lot more people defending the mosquitos than the humans.
I remember someone moaning about how we had driven a species to extinction.
We're a funny lot, really. I've learned not to take us too seriously; especially the folks that take themselves very seriously.
Nobody was much concerned when we eradicated another infectious virus. Unlike Smallpox there was no "military rationale" for keeping copies on ice, so Rinderpest is gone. It appears that its close human relation, Measles, will be around for a long time though because "I don't believe in facts" trumps "My child has died of a preventable disease". So that's certainly evidence for you're "We're a funny lot" theory.
It sure sounds like we're just choosing the species we like. It's like a big walled garden.
It's not choosing species we like as much as that there was previously an equilibrium all ecosystems trend towards, and our influence (killing the wolves) lead to significant ecosystem imbalances that hurt more than just wolves.
Do wolves fix ecosystems? CSU study debunks claims about Yellowstone reintroduction
https://eu.coloradoan.com/story/news/2024/02/09/colorado-sta...
A good story: Media bias in trophic cascade research in Yellowstone National Park
https://academic.oup.com/book/26688/chapter-abstract/1954809...
> The average height of willows in fenced and dammed plots 20 years after the initiation of the experiment exceeded 350 cm, while the height in controls averaged less than 180 cm
> This suggests that well watered plants could tolerate relatively heavy browsing. It also shows that the absence of engineering by beavers suppressed willow growth to a similar extent as did browsing
They posit that the growth in control groups not matching the fenced areas is evidence of wolves reintroduction not having the effects they are said to have. It is a pretty unconvincing argument since there are so many other variables involved. They also prove that IF the wolves have indirectly lead to either the return of beaver dams, or reduced elk browsing, there is undoubtedly an impact in tree growth, which is a positive result regardless.
Their theory that things will never return to their original state, and instead will settle into a new alternate equilibrium is probably correct, but does not seem like the definitive blow to the wolf theory that it’s made out to be.
However, the introduction of wolves did, incontrovertibly, add a system element that had not been present before. Exactly what that element was, and how it expressed is up for interpretation :-)
It also proves the worth of just simple studies over a long period of time. Science used to do a lot of that, and it was very interesting, as many appear on hacker news, but now it seems that cut-n-done grab more popular news.
It also bears the question: what longitudinal studies are popular here besides this one, and retro computing?
Fixed!
https://eu.coloradoan.com/story/news/2024/02/09/colorado-sta... | https://archive.is/k0NqZ
https://academic.oup.com/book/26688/chapter-abstract/1954809... | https://annas-archive[.]org/md5/3d5be21998575e23a28fdaa53ff5...
(You will have to replace "[.]" with "." in the above link in case that wasn't obvious.)
https://www.nps.gov/yell/learn/ys-24-1-the-challenge-of-unde...
TL;DR - the observed reduction of the elk herd correlated with wolf introduction, but also with an increase in cougars, grizzly bears, and even bison, all of which either reduce or compete with elk. Human hunting also added pressure, but that has been limited as the herd size reduced. It is complicated.
"The greater good" is a bit abstract, and your framing suggests it's somehow separate from "the people who live there". A different framing of this question is should individuals be able to degrade ecosystem wealth in order to maximize their personal wealth?
This is the climate story in microcosm. We all know burning carbon is against the "greater good", but if we can pretend that our high-energy lifestyle is somehow independent and unconnected to the planetary ecological systems that support us, then of course, why shouldn't I mortgage my descendants' future for some toys today.
It's not just predators vs livestock, there are a bunch of things that we didn't used to understand about ecosystems that we do now. The societal cost of letting people displace or kill wild animals with abandon is quite high.
Zoonotic diseases are the first to come to mind. How many preventable cases of Plague or Lyme disease is that livestock worth to us?
Eradicating predators created a very convenient, intermittent period where this was less of a necessity, but it also had quite negative externalities.
So the question isn't "is the greater good more important than the people who live there?", but more "is the greater good more important than the convenience of some people who live there?"
This is a question we have to ask ourselves a lot; nobody wants to live near a landfill, a prison, a sewage treatment plant etc, and yet we want them for the greater good.
https://cpw.widencollective.com/assets/share/asset/pzqhipzb1... (see Funding)
Cursory search shows that not just Colorado does this.
"is the greater good more important than the original people who lived there?"
"Gray wolves were reintroduced ... to help control the numbers of elk that were eating young trees"
https://fwp.mt.gov/aboutfwp/public-comment-opportunities Click on the dropdown for “Fall 2025–Winter 2026 Furbearer and Wolf Trapping and Hunting Seasons and Quotas.”
> Montana Fish, Wildlife and Parks (MTFWP) is proposing new, despicable wolf hunting regulations that could allow up to 500 wolves to be killed. This would increase the number of wolves that can be killed next season by 50 percent, nearly half the state’s entire wolf population. MTFWP is also pushing expanded hunting and trapping rules, including allowing hunters to kill up to 30 wolves per person.
> This proposal comes despite livestock losses remaining near historic lows, with only 35 confirmed cattle deaths in 2024, and a significant drop in the number of wolves killed due to livestock conflicts. It is also worth noting that revenue from wolf hunting licenses is among the lowest ever recorded – which helps explain why these expanded rules are less about science and more about politics, profit, and desperation.
> The Montana Fish and Wildlife Commission will vote on this proposal at its next meeting on August 21. In the meantime, public comments are open through August 4, and wolves need your voice. In your comment, consider including the following:
- There is no scientific or ethical reason to kill this many wolves.
- Wolves pose no significant threat to humans.
- Wolves help maintain healthy prey populations by targeting the weak or sick, which may help control the spread of chronic wasting disease in elk and deer.
- Legal hunting can increase poaching.
- Traps and snares are cruel, outdated, and often harm pets and endangered species.
https://www.accuweather.com/en/weather-news/scientists-debun...
https://doctorspaghetti.org/pastafarians-pirates-and-climate...
We also know that dog predation of frisbees is a real problem for healthy disc populations.
Moving a few wolfs, I would hardly call that effort! Stopping regulations and allowing some hunters in Yellowstone would have similar effects!
It is more like morons, who do not understand biology are in goverment! Overprotection allowed elk overpopulation!
Then in a few years it will be "Look, we hunted the herbivores sustainably, but their numbers keep plummeting. That's caused by those evil carnivores. Luckily, we can propose a gun-based solution!"
Waiting for someone to reply to this doing exactly this
I suggest reading Candide by Voltaire, first published 266 years as a critique to the philosophy you are currently espousing.
[0] : https://en.wikipedia.org/wiki/Problem_of_evil
[1] : https://en.wikipedia.org/wiki/Best_of_all_possible_worlds
regaurdless of what was intended your downvote and reply shows a lack of good faith.
But is see This has a human imperialist reaction: why don't we just micro manage everything!
Can other ecosystems do this? Or is Yellowstone the only one?
- intact enough to have quick bounce back behavior upon species reintroduction and
- small enough for you to have a good idea about which species are present
- come with a built-in control variable: the civilian space on the other side of the border represents what would have happened if we had let economics have its way with the land
Maybe you don't need quite that level of protection to see such effects, but generally you do need some. Throwing some wolves at a once-forest that's now half way to being a desert will not always save that forest.
2,200,000 acres, with 100 wolves.
Then they've made the claim that those 100 wolves in 2.2million acres has resulted in plants and fish returning? As opposed to their efforts doing nothing at all?
That said, I believe wolves had a profound effect on the Yellowstone ecosystem, particularly on elk and deer populations. Before their reintroduction, those species had few natural predators beyond hunters, vehicles, bears, and the occasional mountain lion. The imbalance led to overgrazing and the spread of diseases like Chronic Wasting Disease (CWD) in elk.
They've studied it and came to these conclusions, yes. Have you studied it and come to different conclusions?
[1]: https://news.ycombinator.com/item?id=44674445
The reintroduction of wolves is associated with an immediate, steady, and durable decline in elk - i.e. pushed the ecosystem past an inflection point into a new equilibrium.
It’s an interesting question and this could be empirically tested if human hunting would be slowly reduced.
Without risk of harm, elk and deer linger near water. This tramples the shoreline. And they love eating noshing on (aspen) saplings. Over time, the shorelines become barren.
With the reintroduction of wolves, shorelines are no longer safe havens. Aspens have returned. With aspens, song birds have returned. Trees shade the water (eg streams), so fish are happier. Trees stabilize the top soil, reducing erosion, allows other plants to become reestablished.
I dimly recall beavers returned too.
--
Aha. I was mostly right (or hallucinating). Here's perplexity link for "impact of return of wolves to yellowstone".
https://www.perplexity.ai/search/impact-of-return-of-wolves-...
I learned about the birds returning because of the wolves while volunteering at Audubon. That linked summary doesn't go into those details.
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Update: I should've read the OC first. My bad. TIL: (too many) bison also negatively impact riverbanks. I had thought (misremembered) that overall impact of bison was positive. Does Yellowstone need more cougars?
I’ll say that I’ve not read the article so if it’s in the article then I would rather you just point to that, rather than make this response.
After all, off in a democracy an expert expects to be paid by taxpayers to make decisions that affect the taxpayer the expert should be, at the very least, be able to explain himself in an intelligible manner.
Thats the bare minimum of expectations. I also expect the taxpayer funded expert to provided full access to his data, notes and analysis software.
Im considered an expert in thermodynamics, materials science and E&M. The people that pay me routinely don't understand what I'm working on, but they expect me to explain myself.
But the experts did explain themselves. They’ve published numerous studies on how small wolf populations impact the larger ecosystem.
It’s not even that hard to understand. Yes Yellowstone is large, but there are a finite number of elk herds and the wolves move to follow and prey upon the elk herds.
Wolf packs can kill 20 elk per year per wolf, there are 120 wolves inside the park and 500 immediately around the park wandering inside it and killing elk that wander outside.
At the peak there were 18k elk in the park and now the numbers are down to 2000. There’s plenty of evidence that the decline is a direct result of the wolves.
Controlling elk population has tons of 2nd and 3rd order effects which have also been well documented.
Many downvoted comments etc. ( and much thanks for explaining the population numbers!)
The effect on quaking aspens in Pardo is also something we need to study long term. Are the two related?