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Return of wolves to Yellowstone has led to a surge in aspen trees

https://www.livescience.com/animals/land-mammals/return-of-wolves-to-yellowstone-has-led-to-a-surge-in-aspen-trees-unseen-for-80-years
108•geox•4d ago•57 comments

Linux on Snapdragon X Elite: Linaro and Tuxedo Pave the Way for ARM64 Laptops

https://www.linaro.org/blog/linux-on-snapdragon-x-elite/
168•MarcusE1W•7h ago•96 comments

Beetroot juice lowers blood pressure in older people by changing oral microbiome

https://news.exeter.ac.uk/faculty-of-health-and-life-sciences/beetroot-juice-lowers-blood-pressure-in-older-people-by-changing-oral-microbiome/
57•lightlyused•1h ago•16 comments

Chemical process produces critical battery metals with no waste

https://spectrum.ieee.org/nmc-battery-aspiring-materials
160•stubish•10h ago•10 comments

Hierarchical Reasoning Model

https://arxiv.org/abs/2506.21734
125•hansmayer•7h ago•47 comments

High-performance RISC-V processors: UltraRISC UR-DP1000, Zhihe A210, SpacemIT K3

https://www.cnx-software.com/2025/07/22/three-high-performance-risc-v-processors-to-watch-in-h2-2025-ultrarisc-ur-dp1000-zizhe-a210-and-spacemit-k3/
37•fork-bomber•4d ago•7 comments

Fast and cheap bulk storage: using LVM to cache HDDs on SSDs

https://quantum5.ca/2025/05/11/fast-cheap-bulk-storage-using-lvm-to-cache-hdds-on-ssds/
145•todsacerdoti•11h ago•30 comments

Smallest particulate matter air quality sensor for ultra-compact IoT devices

https://www.bosch-sensortec.com/news/worlds-smallest-particulate-matter-sensor-bmv080.html
118•Liftyee•11h ago•37 comments

4k NASA employees opt to leave agency through deferred resignation program

https://www.kcrw.com/news/shows/npr/npr-story/nx-s1-5481304
133•ProAm•9h ago•151 comments

When we get Komooted

https://bikepacking.com/plog/when-we-get-komooted/
317•atakan_gurkan•7h ago•165 comments

A low power 1U Raspberry Pi cluster server for inexpensive colocation (2021)

https://github.com/pawl/raspberry-pi-1u-server
87•LorenDB•3d ago•35 comments

Janet: Lightweight, Expressive, Modern Lisp

https://janet-lang.org
116•veqq•13h ago•49 comments

The future is not self-hosted, but self-sovereign

https://www.robertmao.com/blog/en/the-future-is-not-self-hosted-but-self-sovereign
77•robmao•10h ago•70 comments

Constrained languages are easier to optimize

https://jyn.dev/constrained-languages-are-easier-to-optimize/
32•PaulHoule•5h ago•20 comments

Coronary artery calcium testing can reveal plaque in arteries, but is underused

https://www.nytimes.com/2025/07/26/health/coronary-artery-calcium-heart.html
134•brandonb•16h ago•129 comments

Cable bacteria are living batteries

https://www.asimov.press/p/cable-bacteria
65•mailyk•3d ago•17 comments

StackSafe: Taming Recursion in Rust Without Stack Overflow

https://fast.github.io/blog/stacksafe-taming-recursion-in-rust-without-stack-overflow/
8•andylokandy•3d ago•3 comments

Purple Earth hypothesis

https://en.wikipedia.org/wiki/Purple_Earth_hypothesis
255•colinprince•3d ago•68 comments

How we rooted Copilot

https://research.eye.security/how-we-rooted-copilot/
327•uponasmile•22h ago•133 comments

BlueOS Kernel – Written in Rust, compatible with POSIX

https://github.com/vivoblueos/kernel
20•dacapoday•3d ago•1 comments

Rust running on every GPU

https://rust-gpu.github.io/blog/2025/07/25/rust-on-every-gpu/
568•littlestymaar•1d ago•195 comments

No AI Content

https://eclecticlight.co/2025/07/27/last-week-on-my-mac-%f0%9f%a6%89-no-ai-content/
55•frizlab•3h ago•38 comments

16colo.rs: ANSI/ASCII art archive

https://16colo.rs/
73•debo_•3d ago•17 comments

Resizable structs in Zig

https://tristanpemble.com/resizable-structs-in-zig/
136•rvrb•16h ago•61 comments

Low cost mmWave 60GHz radar sensor for advanced sensing

https://www.infineon.com/part/BGT60TR13C
102•teleforce•3d ago•36 comments

Personal aviation is about to get interesting (2023)

https://www.elidourado.com/p/personal-aviation
130•JumpCrisscross•15h ago•105 comments

What went wrong for Yahoo

https://dfarq.homeip.net/what-went-wrong-for-yahoo/
208•giuliomagnifico•20h ago•199 comments

Teach Yourself Programming in Ten Years (1998)

https://norvig.com/21-days.html
121•smartmic•17h ago•58 comments

Implementing dynamic scope for Fennel and Lua

https://andreyor.st/posts/2025-06-09-implementing-dynamic-scope-for-fennel-and-lua/
19•Bogdanp•3d ago•0 comments

The natural diamond industry is getting rocked. Thank the lab-grown variety

https://www.cbc.ca/news/business/lab-grown-diamonds-1.7592336
235•geox•1d ago•290 comments
Open in hackernews

Return of wolves to Yellowstone has led to a surge in aspen trees

https://www.livescience.com/animals/land-mammals/return-of-wolves-to-yellowstone-has-led-to-a-surge-in-aspen-trees-unseen-for-80-years
106•geox•4d ago
Paper: https://www.sciencedirect.com/science/article/pii/S037811272...

Comments

incomingpain•4d 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•2h 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.

asacrowflies•2h 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 .
ForOldHack•31m 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?

laughingcurve•2h 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.
mousethatroared•2h 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•1h 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•27m 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!)

scott_w•1h 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.

williamdclt•2h 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•2h 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.

[1]: https://news.ycombinator.com/item?id=44674445

isatty•29m ago
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•2h 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•1h 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.

rustyconover•1h ago
Yellowstone is a national park, you can’t hunt anything inside the park’s boundaries. Wolves can.
bhaak•1h ago
Yellowstone park has a policy of natural regulation (since the 70s IIRC). The surrounding areas not necessarily.
scott_w•1h 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.
specialist•1h 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".

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.

--

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?

owenthejumper•2h 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
hagbard_c•2h 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.
ysavir•1h 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•1h 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•1h 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.
mc32•1h 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.
rgreek42•1h ago
Surely this is the best of all possible worlds, Dr. Pangloss.
jebarker•1h 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.
quickthrowman•56m 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•39m 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.)

[0] : https://en.wikipedia.org/wiki/Problem_of_evil

[1] : https://en.wikipedia.org/wiki/Best_of_all_possible_worlds

chuckadams•21m ago
I suspect that "being right in the mathematical sense" is the very thing that Voltaire was lampooning.
thfuran•33m ago
I don’t really see how you got there from what they actually said.
narcraft•20m 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.
throw83944i888•48m 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•41m ago
For clarification, I wouldn't say stopping regulation. It should be "updating regulation" - either increasing hunt quotas, or having an 'open season' time.
cadamsdotcom•2h 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__•46m 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.

atentaten•2h ago
How does returning wolves to ecosystem effect the mountain lion population? Can we balance things out or are we shuffling problems around?
jebarker•1h 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.
djoldman•1h ago
The subtitle explains:

"Gray wolves were reintroduced ... to help control the numbers of elk that were eating young trees"

flkenosad•1h ago
They should try it in nfld
mkw5053•1h ago
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.

[1] https://phys.org/news/2025-02-predators-ecosystems-yellowsto...

sushibowl•1h 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

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...

ChuckMcM•1h 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•42m 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?

bitexploder•44m ago
https://esajournals.onlinelibrary.wiley.com/doi/10.1002/ecm.... CSU study
ricardobeat•34m ago
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.

GlibMonkeyDeath•33m ago
And this one from the National Park Service web site, funded by NSF:

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.

troupo•29m ago
I also read it as "biodiversity is a good thing"
thom•1h ago
Not sure where opinion ended up on this, are there dissenting voices still?

https://www.accuweather.com/en/weather-news/scientists-debun...

ForOldHack•53m 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.
declan_roberts•47m 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•42m 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!

ceejayoz•13m ago
Humans hunt very differently than wolves. The impacts on elk behavior are thus potentially very different.
arnon•39m ago
Finally some good news today
rr808•7m 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?
kingkawn•6m ago
Yes
jeffbee•5m ago
Welfare ranchers grazing on BLM land? Yes.