Colorado

Ants in Colorado are on the move due to climate change

Published

2 years ago

April 10, 2024

Ants in Colorado are on the move due to climate change

Ants in Gregory Canyon in Boulder, Colorado. Credit: Anna Paraskevopoulos/CU Boulder

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 mom, 6-year-old son found dead in Canyonlands National Park in apparent murder-suicide

Published

11 hours ago

January 10, 2026

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Colorado mom, 6-year-old son found dead in Canyonlands National Park in apparent murder-suicide

A Colorado woman and her 6-year-old son were found dead in Canyonlands National Park near Moab, Utah, this week in what appears to be a murder-suicide, law enforcement officials said.

Park rangers responded to a suspicious vehicle parked in a no-camping area near Shafer Trail in the Island in the Sky district of Canyonlands at 8:15 a.m. Thursday, the San Juan County, Utah, Sheriff’s Office said in a news release.

Park rangers found an unresponsive 6-year-old boy in the vehicle and started life-saving measures, but the boy was pronounced dead when he arrived at the hospital.

The woman was found dead outside of the vehicle.

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Battle with the Blue Jackets | Colorado Avalanche

Published

23 hours ago

January 10, 2026

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Battle with the Blue Jackets | Colorado Avalanche

Columbus Blue Jackets (18-18-7) @ Colorado Avalanche (32-4-7)

2 p.m. MT | Ball Arena | Watch: Altitude, Altitude+ | Listen: Altitude Sports Radio (92.5 FM)

After a homestand-opening win on Thursday, the Avalanche hosts the Columbus Blue Jackets for Next Gen Night on Saturday. This is the second and final regular-season matchup between the teams in 2025-26, as the Avalanche defeated the Blue Jackets 4-1 in Columbus on October 16th.

A Big Night at Ball

Josh Manson recorded the first two-goal and four-point game of his career, along with a Gordie Howe hat trick, as the Avalanche defeated the Ottawa Senators 8-2 at Ball Arena on Thursday. Manson was one of five Avs to post at least three points on Thursday, alongside Nathan MacKinnon (1g/3a), Ross Colton (3a), Brock Nelson (2g/1a) and Cale Makar (1g/2a). Additionally, Brent Burns added a goal for Colorado while Scott Wedgewood stopped 29 of the 31 shots he faced in net for the Avs. With the victory, the Avalanche extended its home win streak to 16 games.

At 10:11 of the first period, Manson opened the scoring with his third goal of the season via a shot from the point through traffic. MacKinnon doubled Colorado’s lead at 17:14 of the first period with his 36th goal of the season via a shot from the slot set up by Necas. The Avs took a 3-0 lead at 2:35 of the second period when Makar scored his 13th tally of the season via a left-circle shot after receiving a drop pass from MacKinnon. At 5:08 of the middle frame, Shane Pinto put the Senators on the board. The Senators momentarily made it 3-2 with 13:41 remaining in the second period, but the goal was disallowed after the Avs successfully challenged for offside. After the disallowed tally, the clock was reset to 13:48.

Necas gave the Avs a 4-1 lead on the power play at 11:46 of the second period with his 20th goal of the season via a sharp-angle one-timer from the bottom of the left circle set up by MacKinnon. At 12:03 of the middle frame, Burns made it 5-1 with his sixth goal of the season via a right-point shot through traffic. Nelson gave the Avs a 6-1 lead on a five-on-three power play at 14:23 of the second period with his 20th goal of the season via a right-circle one-timer set up by MacKinnon’s cross-ice feed. The Avalanche took a 7-1 lead at 16:48 of the middle frame when Manson scored his second goal of the game and fourth of the season via a one-timer from the point set up by Jack Drury’s feed. At 18:04 of the middle frame, Nelson scored his second tally of the game and 21st of the season via a right-circle one-timer set up by Ilya Solovyov’s feed from the left point. Brady Tkachuk made it 8-2 with a shorthanded goal from the doorstep at 7:03 of the third period.

Leading the Way

Nate the Great

MacKinnon leads the NHL in goals (36) and points (78) while ranking tied for third in assists (42).

All Hail Cale

Makar leads NHL defensemen in points (51) and assists (38) while ranking third in goals by blueliners (13). Among all NHL skaters, he’s seventh in assists.

Marty Party

Necas is seventh in the NHL in points (55) and tied for ninth in assists (35).

Series History

In 70 previous regular-season games against the Blue Jackets, the Avalanche has a record of 45-19-1-5.

Defeat on the Road

The Blue Jackets lost 5-3 to the Vegas Golden Knights at T-Mobile Arena on Thursday. In the first period, Columbus took a 2-0 lead after goals from Boone Jenner at 8:24 and Kent Johnson at 10:41 before Reilly Smith put Vegas on the board at 12:20. The Golden Knights took a 4-2 lead after second-period goals from Smith at 5:19, Jack Eichel at 13:07 and Mark Stone on the power play at 18:44. Kirill Marchenko scored for the Blue Jackets to make it 4-3 at 14:28 of the third period before Brett Howden gave the Golden Knights a 5-3 lead at 16:14 of the final frame.

Contributors Against Columbus

MacKinnon has posted 26 points (7g/19a) in 22 games against the Blue Jackets.

In nine contests against Columbus, Makar has registered 17 points (6g/11a).

Necas has recorded 21 points (4g/17a) in 26 games against the Blue Jackets.

Producing Offense for Ohio’s Team

Zach Werenski leads the Blue Jackets in points (46) and assists (30) while ranking tied for first in goals (16).

Marchenko is tied for the team lead in goals (16) while ranking second in points (35) and tied for second in assists (19).

Dmitri Voronkov is third on the Blue Jackets in points (28) and goals (15).

A Numbers Game

30

Colorado’s 30 five-on-five goals since December 19th (10 games) are the most in the NHL during that span.

63

The Avalanche’s 63 second-period goals lead the NHL.

3.94

Colorado’s 3.94 goals per game since December 1st lead the NHL during that span.

Quote That Left a Mark

“It was fun. I don’t think he’s ever seen that before. He’s seen me fight. He’s maybe seen me score. But I don’t think he’s ever seen—actually, nobody’s ever seen that before out of me in the NHL. So, it was a first for everybody, including myself.”

— Josh Manson on recording a Gordie Howe hat trick with his father, former NHLer Dave Manson, in attendance

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Colorado man heads to Washington, D.C., to gain support for Marshall Fire survivors

Published

1 day ago

January 9, 2026

Press Room

Colorado man heads to Washington, D.C., to gain support for Marshall Fire survivors

Four years after the fire, recovery is still incomplete for some Marshall Fire victims. A Colorado man is joining wildfire survivors from across the country to push lawmakers to make changes and provide support for survivors still rebuilding.

Recently, a historic $640 million settlement was reached with Xcel Energy, but the Coloradans who lost everything in the Marshall Fire might not be receiving all the money that they’re owed. Some settlements could be taxed, while others were paid in full.

Benjamin Carter

“I was the fourth responding fire engine to the Marshall Fire. By the end of the night, I was triaging homes in the neighborhood that I grew up in,” said former firefighter Benjamin Carter. “I’ve seen how much the community’s hurting, and I just wanted to do whatever I could to help.”

Carter is now fighting for those who lost their homes, including his mother. He’s working with an organization called After the Fire, joining up with wildfire survivors in Oregon, Hawaii and California. This week, Carter flew to Washington, D.C., to speak with lawmakers about how they can help survivors rebuild.

In 2024, lawmakers passed the Federal Disaster Tax Relief Act, which exempted wildfire survivors from taxes on related settlements, among other tax relief. But the bill expired last week, shortly after Xcel agreed to settle over the Marshall Fire.

“If the people don’t have to pay taxes on the damages, then it helps them rebuild,” Carter explained. “Some of the smaller attorneys still haven’t received payment, so all those people will be subject to those taxes; all the attorney fees, and what the actual settlements end up being. And, of what they’re actually getting at the end of the day, that’s been a huge challenge.”

Congress has already proposed extension options. But Carter hopes that by sharing their stories, legislators will act before survivors lose anything else.

“With a lot going on in Washington and everything, the representatives don’t always know about all the issues. And so, we want to educate them on this issue and hopefully gain their support,” Carter said.

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