Colorado
Ants in Colorado are on the move due to climate change
Over the past 60 years, climate change has forced certain ant species, unable to tolerate higher temperatures, out of their original habitats in Gregory Canyon near Boulder, Colorado, according to a new research published April 9 in the journal Ecology.
The resulting biodiversity change could potentially alter local ecosystems, according to first author Anna Paraskevopoulos, a Ph.D. student in the Department of Ecology and Evolutionary Biology at the University of Colorado Boulder.
Like all insects, ants are ectothermic, meaning their body temperature, metabolism and other bodily functions depend on the environment’s temperature. As a result, ants are sensitive to temperature fluctuations, making them a good marker to study the impact climate change has on ecosystems.
More than six decades ago, CU Boulder entomologist Robert Gregg and his student John Browne surveyed the ant populations in Gregory Canyon. After reading their study, Paraskevopoulos and her team set off to investigate whether the ant community had changed since. The researchers sampled the same survey sites on roughly the same dates between 2021 and 2022 as Browne and Gregg did in 1957 and 1958. The team collected hundreds of ant samples from different parts of Gregory Canyon, each with its own unique environment. For example, the canyon’s north-facing slope is a forest with cool temperatures, dominated by pine and fir trees. The south-facing slope is primarily shrubland, while streams and ditches shape the canyon bottom area.
While the city of Boulder has expanded greatly since the original study, Gregory Canyon has remained a natural environment and largely unaffected by land-use change.
“This gave us an opportunity to study the isolated impacts of climate change. In many other studies, the effect of land use and climate change are often entangled,” Paraskevopoulos said.
While she and her team discovered some ant species that were not recorded previously in the canyon, several other ant species had expanded their habitats and dominated the sites.
The team found while the total number of ant species in Gregory Canyon had increased from what was recorded in the earlier paper, several species had expanded their habitats to a broader region and now dominated the sites. At the same time, some other ants Browne and Gregg observed had become less widespread or were even undetected.
“Across the different environments and habitats in the canyon, we’re seeing the composition of ant species becoming more similar,” said Julian Resasco, the paper’s senior author and an assistant professor in the Department of Ecology and Evolutionary Biology.
The team said 12 ant species have become hard to find compared with six decades ago. Ant species that foraged across a broader range of temperatures are now more widespread, while species that foraged across a narrower range of temperatures have become rare, potentially because they are more sensitive to temperature changes, or are facing increased competition from other ant species that managed to expand their habitats.
An ‘insect apocalypse’
Despite their tiny size, ants are essential ecosystem engineers. They supply soil with air through making tunnels and chambers underground, and accelerate the decomposition of dead plants and animals. Different ant species may play unique roles in the ecosystem, such as dispersing certain types of seeds or preying on specific bugs.
“If the ecosystem has only a single type of ant, it could mean that the animal is only contributing to ecosystem functioning in one way, potentially reducing ecosystem stability,” Paraskevopoulos said.
It remains unclear how changes in ant populations in Gregory Canyon have affected the local ecosystem. But when a species disappears, it affects other organisms that rely on them for food, pollination or pest control, Paraskevopoulos said.
The finding illustrates that changes in ant biodiversity could be happening all around the world in both urban and wild spaces as a result of climate change. Globally, insect populations and diversity are rapidly declining, and the study adds another piece of evidence to what many scientists call an ongoing “insect apocalypse.”
An analysis across 16 studies shows that insect populations have declined by 45% in the last four decades. In North America, the monarch butterfly population has fallen by 90% in the last 20 years. In Colorado, one in five native bumblebees is at risk.
“In response to climate change, species are changing the ranges where they’re occurring. Some of them are spreading and becoming winners, while others are crashing and becoming losers. This work helps us understand how those communities reshuffle, which could have implications on how ecosystems function,” Resasco said.
More information:
Anna W. Paraskevopoulos et al, Temperature‐driven homogenization of an ant community over 60 years in a montane ecosystem, Ecology (2024). DOI: 10.1002/ecy.4302
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Ants in Colorado are on the move due to climate change (2024, April 10)
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Colorado
Colorado man sentenced to over 40 years in prison for murder of ex-girlfriend
A Boulder County man was sentenced to 48 years in prison for murdering his ex-girlfriend and dumping her body in 2024.
The Boulder County Sheriff’s Office said Christine Barron Olivas’s body was discovered in a remote area of unincorporated Boulder County on Sept. 14, 2024. She was last seen leaving the neighborhood with her boyfriend, Carlos Dosal, the week prior.
The coroner’s office determined the cause of her death was strangulation.
In Feb. 2026, Dosal pleaded guilty to second-degree murder as a crime of domestic violence in her death. On Saturday, the judge sentenced him to 48 years in the Colorado Department of Corrections.
Colorado
Saturday Night Showdown | Colorado Avalanche
Leading the Way
Nate the Great
MacKinnon is tied for fifth in the NHL in points (10), while ranking tied for seventh in goals (4) and tied for ninth in assists (6).
All Hail Cale
Cale Makar is tied for first in goals (4) among NHL defensemen,
Toewser Laser
Among NHL blueliners, Devon Toews is tied for third in points (7) while ranking tied for fifth in assists (5) and tied for sixth in goals (2).
Series History
The Avalanche and Wild have met in the playoffs on three previous occasions, all in the Round One, with Minnesota winning in 2003 and 2014 in seven games while Colorado was victorious in six contests in 2008.
Making Plays Against Minnesota
MacKinnon has posted 16 points (4g/12a) in nine playoff games against the Wild, in addition to 70 points (27g/43a) in 55 regular-season contests.
Makar has registered three points (2g/1a) in two playoff contests against Minnesota, along with 26 points (6g/20a) in 29 regular-season games.
Necas has recorded five points (1g/4a) in two playoff games against the Wild, in addition to nine points (5g/4a) in 15 regular-season games.
Scoring in the Twin Cities
Quinn Hughes is tied for the Wild lead in points (11) and assists (8) while ranking tied for second in goals (3).
Kaprizov is tied for first on the Wild in assists (8) and points (11) while ranking tied for second in goals (3).
Matt Boldy leads the Wild in goals (6) while ranking third in points (10) and tied for fourth in assists (4).
A Numbers Game
4.50
Colorado’s 4.50 goals per game on the road in the playoffs are tied for the most in the NHL.
39
MacKinnon’s 39 playoff goals since 2020-21 are the second most in the NHL.
2.17
The Avalanche’s 2.17 goals against per game in the playoffs are the second fewest in the NHL.
Quote That Left a Mark
“It should definitely get you up and excited. It’s gonna be a good test. [It’s a] great building and [it’s] against a desperate team. It’s gonna be great.”
— Gabriel Landeskog on playing in Minnesota
Colorado
Colorado Gov. Jared Polis signs state budget, with Medicaid taking brunt of cuts to close $1.5 billion gap
Colorado Gov. Jared Polis on Friday, May 8, signed into law a $46.8 billion state budget that cuts healthcare spending but preserves funding for K-12 education.
The budget applies to the 2026-27 fiscal year, which begins on July 1, and caps months of work by lawmakers, who wrestled with how to close a roughly $1.5 billion gap that ultimately forced reductions to Medicaid funding and other programs.
“This year was incredibly difficult and challenged each of us in a myriad of ways that put our values to the test,” said Rep. Emily Sirtota, a Denver Democrat and chair of the bipartisan Joint Budget Committee, which crafts the state’s spending plan before it is voted on by the full legislature. “It’s a zero-sum game. A dollar here means a dollar less over here.”
The state’s spending gap was the result of several factors.
The legislature is limited in how it can spend under the Taxpayer’s Bill of Rights, or TABOR, an amendment to the state constitution approved by voters in 1992 that limits government revenue growth to the rate of population growth plus inflation.
Lawmakers are also dealing with the consequences of increased spending on programs they created or expanded in recent years, some of which have seen their costs balloon beyond their original estimates. Costs for Medicaid services, in particular, have surged, driven by inflation, expanded benefits and greater demand for expensive, long-term care services due to Colorado’s aging population.
Medicaid cuts
Medicaid recently eclipsed K-12 education as the single-largest chunk of the state’s general fund and now accounts for roughly one-third of all spending from that fund.
Lawmakers, who are required by the state constitution to pass a deficit-free budget, said they had no choice but to cut Medicaid funding as a result.
That includes a 2% reduction to the state’s reimbursement rate for most Medicaid providers. The budget also institutes a $3,000 cap on adult dental benefits, limits billable hours for at-home caregivers of family members with severe disabilities to 56 hours per week and phases out, by Jan. 1, automatic enrollment for children with disabilities to receive 24/7 care as adults.
The budget also cuts benefits and places new limits on Cover All Coloradans, a program created by the legislature in 2022 that provides identical coverage as Medicaid to low-income immigrant children and pregnant women, regardless of their immigration status.
That includes an end to long-term care services for new enrollees, a $1,100 limit on dental benefits, and an annual enrollment cap of 25,000 for children 18 or younger. The cuts come as spending on the program has grown more than 600% beyond its original estimate, going from roughly $14.7 million to an estimated $104.5 million for the 2025-26 fiscal year.
While the budget still represents an overall increase in Medicaid spending compared to this year, funding is roughly half of what it would have been had lawmakers not made any changes to benefits and provider rates, which total about $270 million in savings for the state.
Healthcare leaders say the cuts will exacerbate an already challenging environment for providers, who are bracing for less federal support after Congress last year passed sweeping Medicaid cuts and declined to renew enhanced subsidies for the Affordable Care Act.
For rural hospitals in particular, Medicaid is one of their key funding drivers.
“While a 2% (Medicaid reimbursement rate cut) doesn’t sound like a whole lot, when we already have close to 50% of our rural hospitals statewide operating in the red and 70% with unsustainable margins, facing another 2% (cut) on top of that is just devastating,” said Michelle Mills, CEO for the Colorado Rural Health Center, which represents rural hospitals on the Western Slope and Eastern Plains.
If the state provides less reimbursement for Medicaid services, Mills said it will lead to fewer providers accepting Medicaid plans. That in turn will mean fewer care options for people, particularly in Colorado’s rural counties, where healthcare services are already more limited.
“I feel like all of the decisions and cuts that they’re making are hitting everyone,” she said.
Rep. Rick Taggart, a Grand Junction Republican and budget committee member, said cuts to healthcare led to “a lot of tears.”

“This was a tough budget, and nobody won in this budget, but we did what we had to do by way of the (state) constitution,” he said.
While Medicaid saw some of the biggest cuts, lawmakers also trimmed spending from a suite of other programs, including financial aid for adoptive parents and grants providing mental health support for law enforcement.
Preserving K-12 education
One of the brighter spots for Polis and lawmakers in the budget is K-12 education.
After years of chronically underfunding the state’s schools, lawmakers in 2024 rolled out a revamped funding formula and abolished what was known as the budget stabilization factor, a Great Recession-era mechanism that had allowed the state to skirt its constitutional funding obligation to schools for more than a decade.
The new funding formula went into effect this school year, and the state is set to continue delivering higher levels of K-12 funding in the 2026-27 fiscal year budget. The budget allocates roughly $10.19 billion in K-12 funding, an increase of roughly $194.8 million, though the specifics of that spending are still being worked out in a separate bill, the 2026 School Finance Act, which has yet to pass the legislature.
The finance act guides how state and local funds are allocated to Colorado’s 178 school districts on a per-pupil basis. As it stands now, the bill is on track to increase per-pupil funding by $440 per student for the 2026-27 fiscal year, for a total of $12,314 per student.
“We are not returning to the days of underfunding our schools and a budget stabilization factor,” Polis said.

Still, there are challenges on the horizon for some districts.
Combined with a proposed three-year averaging model for student counts instead of the current four-year averaging, recent dips in student enrollment across the state will weigh more heavily on how much funding is allocated to each district. The shift to three-year averaging advances the state’s plan to gradually phase in the new school finance formula by 2030-31.
With several districts seeing decreased year-over-year enrollment and rising operational expenses like healthcare, some Western Slope school districts are poised to see less funding compared to this year, while others are seeing their increases eaten up by inflation.
A note on wolves
The topic of Colorado’s spending on gray wolf reintroduction hasn’t gone away, and while Medicaid headlined much of the budget discussions, lawmakers also used the spending plan to send a message on the future of the wolf program.
While the budget allocates $2.1 from the general fund to Colorado Parks and Wildlife to spend on wolf reintroduction, it also contains a footnote from lawmakers asking the agency not to use the money to acquire new wolves.
Footnotes are not legally binding, but rather serve as a direction or guidance from lawmakers to agencies on how they want certain funds spent.
Under the footnote, the wildlife agency could still use gifts, grants, donations and non-license revenue from its wildlife cash fund to bring additional wolves to Colorado. Most of the agency’s wolf funding goes toward personnel, followed by operating costs, compensation for ranchers and conflict minimization programs and tools.
Education reporter Andrea Teres-Martinez and wildlife and environmental reporter Ali Longwell contributed to this story.
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