Surviving the Chill: The Marvels of Cold-Weather Stream Life

November 6, 2024

Surviving the Chill: The Marvels of Cold-Weather Stream Life

Magic is happening out there

During winter, rivers and streams are often thought of less as we’re holed up in our homes, cozy under blankets next to a roaring fireplace. However, magic is happening out there. In the frigid embrace of below-freezing temperatures, bodies of water transform into icy landscapes, presenting a challenging yet opportunistic environment for plants and wildlife. 


Plants


When the cold sets in and ice blankets the water’s surface, vegetation along rivers and streams starts winter dormancy. Many plants retreat into a state of suspended animation, conserving energy by losing leaves until the thaw of the spring. But, beneath the frozen surface, their roots continue to sustain life by holding onto water and waiting for warmer days. The submerged plants decompose, providing food for aquatic life during winter months. 


Deep in the river beds, bacteria and other decomposers take advantage of the lower oxygen levels and begin to clean house. Leaves and other organic materials that fell in the Fall start breaking down into new sediment. This sediment will ultimately feed new plant growth life as the seasons change and warm up again.


Wildlife


For wildlife inhabiting the frigid landscape of frozen streams and rivers, adapting to winter’s icy embrace becomes a matter of survival. Aquatic species such as fish become sluggish, slowing their metabolism to conserve energy in the face of limited food. Trout seek out deeper pools where the water remains relatively unfrozen, providing a refuge against the cold. The cool part about cold-blooded fish like trout, salmon and pike is they can adjust their body temperature to the environment in which they live. Therefore, even at low temperatures, their bodies allow them to swim easily, even if they are a little slower. 


Amphibians and some insects, on the other hand, may hibernate in terrestrial habitats surrounding the water bodies, awaiting the warmer temperatures of spring. They employ various strategies, from burrowing into the soil to seeking refuge in decaying vegetation, to endure the harsh winter conditions.


The icy cold


While winter poses challenges for both flora and fauna, the ice itself plays a crucial role in maintaining aquatic ecosystem health. Ice acts like an insulating layer, protecting the water beneath from extreme temperature fluctuations which could ultimately harm aquatic life. In some areas, where cold enough, the frozen surfaces of streams and rivers can offer more room to roam as they become winter highways for certain species. Animals like coyotes, foxes and elk can travel more efficiently in search of harder-to-find food or suitable shelter. 


Truthfully, we think rivers and streams are just as, if not more, beautiful in the winter than in the summer. It’s captivating to think about the adaptability of nature during this time. It’s also important to remember that while most river projects and activities happen in the warmer months, the winter should not be forgotten. Important changes happen then, too. It’s essential to recognize and appreciate the resilience of plants and wildlife that endure and thrive amid frosting conditions. It’s up to all of us to keep our rivers healthy in every season so that when winter circles back around, plants and wildlife that depend on our rivers are set up to thrive.


Ideas to help rivers in the winter:


Avoid excessive use of de-icers and salts.

Conserve water. 

Avoid clearing vegetation along riverbanks. 

Support conservation organizations like Forever Our Rivers.

Practice responsible winter fishing.

Report and clean up pollution.

By Brian Riepe June 19, 2025
In the West, our rivers are more than just waterways—they’re the lifeblood of our wild landscapes. Whether you’re running cattle, growing peaches, casting a fly, navigating a rapid or simply soaking in a riverside sunset, you’ve felt the power and the serenity of these waters. But how do we know if our rivers are healthy? That’s where restoration, monitoring—and you—come in. At Forever Our Rivers, we improve water quality and restore wildlife along rivers and streams throughout the Southwest including the Gunnison, Verde, South Platte, Dolores, Escalante—even the mighty Colorado. But rivers aren’t static. Once a project is finished, active, skilled monitoring is key to ensure the restoration remains effective. Volunteers are needed now more than ever. And volunteering can take many forms. If you’re not excited about spending the day removing tamarisk with a chain saw, a less arduous way to contribute is by learning to monitor water and habitat health on your local river. It’s easier than you might think—and it’s fascinating. Through research that began in 2018, Western Colorado University students and volunteers led by Associate Professor of Wildlife and Conservation Biology Pat Magee helped shape local policy by monitoring great blue heron nesting sites. Their data led to community outreach and new habitat protections along the Slate River near Crested Butte, Colorado. The volunteers, people like you and me, are helping baby chicks survive. Across the Southwest, groups we collaborate with also rely on volunteers to protect and restore river ecosystems. Running now through May 3, Friends of the Verde is seeking volunteers to help with the third annual Bio Blitz , a community-driven event inviting volunteers to help identify as many living species as possible within the Verde Watershed. Rivers Edge West currently lists sixteen volunteer or educational events taking place in the Grand Valley over the next twelve months. The Roaring Fork Conservancy is seeking volunteers April 25 – 29 for the annual Watershed Cleanup on the Fryingpan and Roaring Fork rivers near Carbondale, Colorado. Sometimes you can even get paid to help, Conservation Legacy’s youth crews collect essential water quality data while building job skills and deepening their connection to nature. You can read more about these success stories in the links below. Whether you’re a student, retiree or weekend warrior, there’s a place for you. You don’t need a science degree—just a love for rivers and a willingness to learn. Together, we can keep our waterways clean, our habitats healthy and our communities strong. Want to help? Reply to this email or visit Forever Our Rivers to find a conservation group near you. See you on the water, Brian Riepe Grant Program Lead
By Brian Riepe June 19, 2025
In the West, our rivers are more than just waterways—they’re the lifeblood of our wild landscapes. Whether you’re running cattle, growing peaches, casting a fly, navigating a rapid or simply soaking in a riverside sunset, you’ve felt the power and the serenity of these waters. But how do we know if our rivers are healthy? That’s where restoration, monitoring—and you—come in. At Forever Our Rivers, we improve water quality and restore wildlife along rivers and streams throughout the Southwest including the Gunnison, Verde, South Platte, Dolores, Escalante—even the mighty Colorado. But rivers aren’t static. Once a project is finished, active, skilled monitoring is key to ensure the restoration remains effective. Volunteers are needed now more than ever. And volunteering can take many forms. If you’re not excited about spending the day removing tamarisk with a chain saw, a less arduous way to contribute is by learning to monitor water and habitat health on your local river. It’s easier than you might think—and it’s fascinating. Through research that began in 2018, Western Colorado University students and volunteers led by Associate Professor of Wildlife and Conservation Biology Pat Magee helped shape local policy by monitoring great blue heron nesting sites. Their data led to community outreach and new habitat protections along the Slate River near Crested Butte, Colorado. The volunteers, people like you and me, are helping baby chicks survive. Across the Southwest, groups we collaborate with also rely on volunteers to protect and restore river ecosystems. Running now through May 3, Friends of the Verde is seeking volunteers to help with the third annual Bio Blitz , a community-driven event inviting volunteers to help identify as many living species as possible within the Verde Watershed. Rivers Edge West currently lists sixteen volunteer or educational events taking place in the Grand Valley over the next twelve months. The Roaring Fork Conservancy is seeking volunteers April 25 – 29 for the annual Watershed Cleanup on the Fryingpan and Roaring Fork rivers near Carbondale, Colorado. Sometimes you can even get paid to help, Conservation Legacy’s youth crews collect essential water quality data while building job skills and deepening their connection to nature. You can read more about these success stories in the links below. Whether you’re a student, retiree or weekend warrior, there’s a place for you. You don’t need a science degree—just a love for rivers and a willingness to learn. Together, we can keep our waterways clean, our habitats healthy and our communities strong. Want to help? Reply to this email or visit Forever Our Rivers to find a conservation group near you. See you on the water, Brian Riepe Grant Program Lead
By Brian Riepe June 19, 2025
The warmer, sunny weather in Crested Butte this week makes me smile as I know spring isn’t far behind. Soon the Sandhill cranes will begin their migration, and flowers will ever so slowly peek out from the forest floor. But we are in no hurry here at the headwaters of the Colorado River. A long and snowy winter in the northern Rockies has left high elevations north of the Colorado and Utah Borders buried deep under several feet of snow. Even so, nature is calling us all to step outside and enjoy the longer days. And now, like never before, is the time when people need nature—and nature needs us. At Forever Our Rivers, January blew in with encouraging momentum. Heading into our tenth year, with strong partnerships across the four corners region, strategies to improve wildlife habitat for moose, otters, fish and songbirds were in place, and in the southern reaches of the Colorado River basin boots were already on the ground. Communities large and small were behind an extraordinary push to save our state’s rivers, ramp up habitat restoration and care, and assist communities with water quality and quantity. In fact, as we started out this year, it looked like we would be able to accelerate the pace of local river conservation and also work on wildfire mitigation. But now, I’m sorry to report that we and other local conservation organizations are facing major challenges. The current freeze and imminent loss of federal conservation funds will significantly impact our efforts and those of our partners. Many are still trying to assess and predict what’s coming next. Forever Our Rivers is working diligently to keep programs going through other forms of funding. Thankfully, people like you care. That’s why I’m asking for your help given the unprecedented nature of this year’s financial uncertainty. If you or someone you know is interested in stepping in to empower healthy rivers there are many cash-free and tax savvy giving options. Please visit our Ways to Give page for more information. Gifts from donor-advised funds, gifts of stock and minimum required distributions from an IRA are all excellent ways to make a gift and potentially reduce your income taxes. If we can close the shortfall of the sudden and unexpected loss of conservation funding, we can continue to save critical waterways in Colorado. Please know there is no better way to make a local difference than conserving the rivers and streams you treasure. You can improve the outlook for rivers today and into the future. Feel free to email myself or our grant program lead Brian Riepe , anytime with questions, comments, rivers news, or your favorite book recommendations. Ann Johnston Executive Director Forever Our Rivers Foundation
By Brian Riepe June 19, 2025
Welcome to our first edition of Currents, the updated monthly newsletter from Forever Our Rivers
By Brian Riepe June 19, 2025
Welcome to our first edition of Currents, the updated monthly newsletter from Forever Our Rivers
By Brian Riepe December 16, 2024
This Holiday Season, Help Make Snow Angels with Forever Our Rivers
By Brian Riepe December 12, 2024
Rivers Offer Relief from Daily Stress, Boost Mental Health
By Jennifer Swift November 6, 2024
Visit Your Rivers in Recognition of Mental Health Awareness
By Jennifer Swift November 6, 2024
Forever Our Rivers Receives Accreditation
By Jennifer Swift November 6, 2024
White Fluff, River Health and Wildlife
Show More