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Dan MacNulty

@danmacnulty.bsky.social
139 followers 99 following 38 posts

Ecologist, Professor, Utah State University

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Dan MacNulty @danmacnulty.bsky.social · 20/04/2026
BBC: There’s a lovely film on Youtube called How Wolves Change Rivers. It describes how wolf reintroduction to Yellowstone precipitated a series of ecological benefits…It’s a beautiful and uplifting notion but, according to some scientists, total nonsense.🧪 www.discoverwildlife.com/animal-facts...
discoverwildlife.com
“They felt they’d been deceived.” Was Yellowstone’s celebrated wolf reintroduction all it’s cracked up to be? | Discover Wildlife
It’s over 30 years since wolves were reintroduced to Yellowstone but the pay-off for the park is disputed
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Dan MacNulty @danmacnulty.bsky.social · 27/02/2026
Appreciate this thoughtful op-ed recognizing that "wolves are not magical levers that can single-handedly reset complex ecosystems." www.explorebigsky.com/dispatches-f...
explorebigsky.com
Dispatches from the Wild: Rethinking Yellowstone’s wolves | Explore Big Sky
The myth of a perfect trophic cascade By Benjamin Alva Polley EBS COLUMNIST For years, Yellowstone’s wolves have been held up as the poster animals for ecological redemption. Some people say they are ...
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Dan MacNulty @danmacnulty.bsky.social · 21/02/2026
Thirty years after wolf reintroduction, has Yellowstone’s celebrated “trophic cascade” — popularized by How Wolves Change Rivers — delivered what many claim? BBC Wildlife Magazine (March 2026) revisits the debate. Access here (free sign-in required): 🧪 www.ziniounlimited.com/article/bbc-...
Grey wolf standing in Yellowstone’s Lamar Valley beside a coyote, with sagebrush grassland and large boulders in the foreground; image from BBC Wildlife Magazine March 2026 feature on wolf reintroduction.
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Dan MacNulty @danmacnulty.bsky.social · 06/02/2026
A new exchange in @esajournals.bsky.social highlights a common omission in the Yellowstone trophic cascade story: >100 beavers were reintroduced, spanning years before and after wolf reintroduction. 🧪 Beschta et al (comment): doi.org/10.1002/ecm.... Hobbs et al (reply): doi.org/10.1002/ecm....
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Dan MacNulty @danmacnulty.bsky.social · 22/01/2026
New critique prompts correction of high-profile Yellowstone aspen study. Correction fixes a math error, but lack of young aspen across >50% of sampled sites complicates story of “widespread” aspen recovery after wolf reintroduction. 🧪 www.eurekalert.org/news-release...
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Dan MacNulty @danmacnulty.bsky.social · 06/01/2026
In LiveScience, Ripple defends his willow paper by saying “the basic scientific logic of the paper is solid.” Yet the analysis relies on a tautology: re-expressing height as “volume” and treating it as new evidence. That is circular reasoning, not solid logic. 🧪 www.livescience.com/animals/land...
livescience.com
Did reintroducing Wolves to Yellowstone really cause an ecological cascade?
Previous research on the effect of wolves on the food web has been criticized, raising questions about the predator’s role in the Yellowstone ecosystem.
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Dan MacNulty @danmacnulty.bsky.social · 04/01/2026
Painter et al.’s reply fixes the math but sidesteps the bigger problem: mean-based effect sizes from zero-inflated, non-equilibrium data are misleading indicators of trophic cascade strength. The claim of a strong & ecologically significant aspen cascade remains overstated. 🧪 doi.org/10.1016/j.fo...
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Dan MacNulty @danmacnulty.bsky.social · 30/12/2025
Our critique is now published in Forest Ecology & Management. We show why the corrected 17.5× increase in average sapling density still overstates aspen recovery: mean-based metrics are driven by a small minority of plots, while most showed little or no change. 🧪 authors.elsevier.com/a/1mMLU1L%7E...
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Dan MacNulty @danmacnulty.bsky.social · 28/12/2025
Painter et al. have issued a corrigendum conceding that the headline 152× increase in aspen sapling density was an error (now 17.5×), consistent with our critique. But the revised result still relies on averages that mask how most aspen stands showed little or no change. 🧪 doi.org/10.1016/j.fo...
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Dan MacNulty @danmacnulty.bsky.social · 10/12/2025
“The narrative that wolves are a kind of silver bullet that saved the aspen in Northern Yellowstone is oversimplified” - Nick Bergeron, USU researcher🧪 mountainjournal.org/have-wolves-...
mountainjournal.org
Have Wolves Saved Yellowstone’s Aspens? - Mountain Journal
Claims that wolves have rescued Yellowstone National Park aspen trees through a ‘trophic cascade’ oversimplify a complex story
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Dan MacNulty @danmacnulty.bsky.social · 02/12/2025
IFLScience reports that Ripple et al. “stand by their original assessment” and “have prepared a detailed reply explaining why [MacNulty et al.’s] criticisms are inaccurate.” Their reply “is set to be published as soon as possible.”🧪 www.iflscience.com/yellowstones...
iflscience.com
Yellowstone’s Wolves And The Controversy Racking Ecologists Right Now
Who will be top dog in the battle of the wolf researchers?
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Dan MacNulty @danmacnulty.bsky.social · 20/11/2025
"For readers, the lesson is plain. Big claims deserve clear tests that do not stack the deck or skip steps."🧪
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Dan MacNulty @danmacnulty.bsky.social · 17/11/2025
The story of Wolf 1329M provides a textbook example of the source-sink dynamic that limits the spread of Yellowstone wolves beyond the Greater Yellowstone Ecosystem. 🧪 wyofile.com/what-happens...
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Dan MacNulty @danmacnulty.bsky.social · 16/11/2025
World’s largest sage grouse lek and longest mule deer migration threatened by oil & gas lease sale in western Wyoming. wyofile.com/drilling-lea... Public comments due Monday, 17Nov. eplanning.blm.gov/eplanning-ui...
wyofile.com
Drilling lease slated 2 miles from world’s largest sage grouse lek, center punching planet’s longest mule deer migration - WyoFile
Parcel 0712 is part of a complex of oil and gas leases in ecologically valuable sagebrush-steppe that the Bureau of Land Management has proposed for auction in June.
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Dan MacNulty @danmacnulty.bsky.social · 03/11/2025
🧪Now that the flaws in Ripple et al. (2025) are on record, it’ll be an interesting test of scientific integrity to see if and how that paper is used. This Science letter, for instance, cites Ripple et al. (2025) in calling for strict wolf protection across Europe. www.science.org/doi/10.1126/...
science.org
Restore strict protection for wolves in Europe
After centuries of persecution that drove wolf (Canis lupus) populations to the brink of extinction in most European countries (1), conservation measures and changes in land use have allowed the speci...
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Dan MacNulty @danmacnulty.bsky.social · 02/11/2025
🧪About that “152×” Yellowstone aspen claim (see WaPo headline). In a new preprint we show it’s a math error that inflated the effect by 768%. Corrected: 17.5×. Preprint: doi.org/10.32942/X2W...
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Dan MacNulty @danmacnulty.bsky.social · 26/10/2025
Claims about “wolves reshaping ecosystems” are powerful—but only if they’re accurate. This Aspen Times article on Colorado’s wolf reintroduction shows why getting the Yellowstone trophic cascade story right matters for public understanding and policy: www.aspentimes.com/news/colorad...
aspentimes.com
Could Colorado see widespread ecosystem changes from wolf restoration?
In Yellowstone National Park — where gray wolves were reintroduced starting in 1995 — researchers have gone back and forth on whether the restoration of wolves has impacted the ecosystem.
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Dan MacNulty @danmacnulty.bsky.social · 23/10/2025
🧪 phys.org/news/2025-10...
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Dan MacNulty @danmacnulty.bsky.social · 14/10/2025
🧪You may have heard that large-carnivore recovery in Yellowstone National Park triggered one of the world’s strongest trophic cascades. Our new open-access article explains why that story doesn’t hold up: www.sciencedirect.com/science/arti...
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Dan MacNulty @danmacnulty.bsky.social · 20/08/2025
wyofile.com/feedgrounds-...
wyofile.com
Feedgrounds grow elk herds? Wolves, grizzlies might mop up benefits, study finds. - WyoFile
U.S. Geological Survey analysis using demographic data from 13 Greater Yellowstone Ecosystem elk herds suggests few overall benefits from feeding, including for hunting.
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Dan MacNulty @danmacnulty.bsky.social · 09/08/2025
🧪 New preprint We critically evaluate claims of a strong trophic cascade in Yellowstone following wolf recovery, identifying major methodological flaws that undermine this conclusion. Read the full analysis here (open access): doi.org/10.32942/X2Q... #Ecology #Yellowstone #TrophicCascades
doi.org
Flawed analysis invalidates claim of a strong Yellowstone trophic cascade after wolf reintroduction: A comment on Ripple et al. (2025)
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Reposted by Dan MacNulty
WyoFile @wyofile.com · 05/02/2025
A bill that threatened to decimate Wyoming's mountain lion populations fell spectacularly flat on Tuesday. Environmental groups, hunting orgs, houndsmen and citizens testified by the dozen encouraging lawmakers to kill a La Barge representative’s proposal to do away with science-based management.
wyofile.com
Mountain lion ‘eradication bill’ backed up a tree by overwhelming opposition - WyoFile
Environmental groups, outfitters, hunters, houndsmen testified by the dozen against a measure that would have stripped cougars of any protections, and wildlife professionals of management authority.
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Dan MacNulty @danmacnulty.bsky.social · 03/02/2025
www.nytimes.com/2025/02/01/o...
nytimes.com
Overlooked No More: Annie Easley, Who Helped Take Spaceflight to New Heights
She broke barriers at NASA and contributed to its earliest space missions as a rocket scientist, mathematician and computer programmer.
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Dan MacNulty @danmacnulty.bsky.social · 25/01/2025
Two bills seeking to roughly halve Montana’s wolf population pass out of committee. HB 222 and HB 176 seek to reduce Montana’s wolf population by expanding the hunting season and lifting hunting and trapping limits. montanafreepress.org/2025/01/24/t...
montanafreepress.org
Two bills seeking to roughly halve Montana’s wolf population pass out of committee
HB 176 and 222, which seek to reduce wolf numbers, will advance to the Montana House for a floor vote.
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Dan MacNulty @danmacnulty.bsky.social · 21/01/2025
Montana seeks to cap its wolf population at 450. House Bill 176 proposes several measures to reduce wolf numbers when the population is at or above 450, including allowing a single hunter to kill an unlimited number of wolves. Hearing: today, 3 PM MST. bills.legmt.gov#/laws/bill/2...
bills.legmt.gov
Bill Explorer
Explore, track, and stay informed on legislative bills in Montana with the Montana Legislature Bill Explorer application. Access detailed information, monitor bill progress, and engage with the legis...
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Dan MacNulty @danmacnulty.bsky.social · 16/12/2024
New open access paper by John Benson & colleagues explores the drivers of group cohesion in social canids. Cohesion varies widely, shaped by life history, prey, group size, and humans. In wolves, it declines as pack size grows or human disturbance increases. 🧪 doi.org/10.1002/ecy....
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Reposted by Dan MacNulty
Dan MacNulty @danmacnulty.bsky.social · 09/12/2024
Our new paper offers rare insights into the ecology of wolves in the High Arctic. GPS tracking revealed relatively high wolf densities, year-round territories, and likely sustainable muskox predation—but also potential risks to endangered Peary caribou. doi.org/10.1002/jwmg...
doi.org
TWS Journals
Wolves in a productive area of Canada's High Arctic remain on territories year-round at densities similar to populations farther south, primarily preying on muskoxen and Arctic hares. The high densit...
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Dan MacNulty @danmacnulty.bsky.social · 09/12/2024
Our new paper offers rare insights into the ecology of wolves in the High Arctic. GPS tracking revealed relatively high wolf densities, year-round territories, and likely sustainable muskox predation—but also potential risks to endangered Peary caribou. doi.org/10.1002/jwmg...
doi.org
TWS Journals
Wolves in a productive area of Canada's High Arctic remain on territories year-round at densities similar to populations farther south, primarily preying on muskoxen and Arctic hares. The high densit...
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Dan MacNulty @danmacnulty.bsky.social · 08/12/2024
Much appreciate @soseaemerald.bsky.social for helping the public understand our recent paper debunking the myth that fear of wolves drives aspen recovery in Yellowstone. The lead image features another wily canid—the coyote. doi.org/10.1002/ecm.... southseattleemerald.org/news/2024/12...
southseattleemerald.org
Weekend Reads | Elk, Wolves, and Habitat Recovery in Yellowstone National Park
There's an old saying: "Never let the truth stand in the way of a good story." This weekend's read is the truth behind a really good story about habitat recovery in Yellowstone National Park. In case ...
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