Here in SE Utah, we are living in a geologically young, rapidly eroding landscape and we have the Colorado River to thank for sculpting such a beautiful and dynamic area.  We talk with Joel Pederson, professor and Department Head of Geomorphology at Utah State University about his continuing research on incision rates of the Colorado River across the Colorado Plateau.  We talk about some new advancements in age dating and why the area around Moab is currently the fastest eroding reach of the River.

Sculpting a Plateau

The Little Colorado River (LCR) is a culturally and spiritually significant drainage for many people in the southwest.  The LCR also provides sediment load to the main stem of the Colorado River for the production of sandbars downstream AND it is an important spawning ground for and home to the largest population of Humpback Chub.  We talk with Phoebe Brown, river guide and researcher, about her studies that involve understanding the interactions of phosphorus and the growth rates of the Humpback Chub.

Studying Growth Rates of the Humpback Chub

Sagebrush once stretched across almost 500,000 square miles from the Dakotas to California. Each year, a million acres is lost to invasive species, catastrophic wildfire, development, improper grazing and climate change.  Matt Cahill is the director of the Sagebrush Sea program for The Nature Conservancy.  Matt advocates that scientific solutions and large-scale collaboration are needed to reverse the trend in sagebrush. We talk with Matt about what is being done to save this vital landscape.

The Space between the Mountains

It is well known at this point that humans are using more water out of the Colorado River, then the river can support…for humans as well as other life forms that live along and within the river. Agriculture is using approximately 80% of that water.   We talk with Aaron Derwingson, Water Projects Director of the Colorado River Program for the Nature Conservancy.  Aaron and his team do freshwater conservation restoration projects across the whole Colorado River Basin, involving a combination of work from science and policy to direct project work on the grounds. By working to build relationships with the agricultural community, the team hopes to help ensure that there are sufficient water supplies for both people and nature.

Working Together for River Conservation

Rangelands are vast, natural grasslands, shrublands, woodlands, wetlands, and deserts that support grazing and browsing mammals and they are primarily natural ecosystems with native vegetation.These rangelands can become degraded by fire or improper grazing. We talk with Kari Veblen, professor of Rangeland Ecology at Utah State University about her research that focuses on the ecology and management of rangelands.  Her research emphasizes multi-use landscapes, public and private, that are managed simultaneously for wildlife conservation and sustainable livestock production.  The ultimate goal of her work is to inform sustainable management of rangeland ecosystems.

Restoration on the Range

From the perspective of an archaeologist, the physical body of an ancient person is a gift because a body is a time capsule of the past.  They lived in that space and that time, and their bodies are manifestations of what was there.  We talk with archaeologist Erin Baxter, teacher and Curator of Anthropology at Denver Museum of Nature and Science, about her work unraveling the ancient southwest culture and her fascination with the archaeology of death.

Finding Collaboration and Trust Uncovering the Past

As photosynthesis happens, trees take in carbon from the atmosphere and store it in the form of sugars or carbohydrates.  These sugars can be stored for many years in trees as a sort of “memory” and used to support their growth and metabolism during times of stress, like a drought.  We talk with Drew Peltier, ecophysiologist and professor at the University of Nevada, Las Vegas.  Drew’s interests and research center on understanding how climate influences tree growth in our changing environment.

Memory In Trees

This show is part of a series exploring Science Moab’s School to Science Program, connecting students with scientists in the field, the lab, and beyond. This program began in 2021 and to date has mentored over 57 local students.  In this episode, we talk with mentor Mary Langworthy, Public Programs Manager at the Moab Museum, and Klayre Humphreys, junior at Grand County High School.  Mary has sponsored several day long job shadows with local students facilitated by Science Moab.  Klayre spent a day at the museum with Mary in the spring of 2024 and ended up delving into the world of shark teeth which ultimately helped Moab Museum staff update and enhance their exhibit.

Day at the Museum

Sunset Crater, the most recent cinder cone in the San Francisco Volcanic Field, is estimated to have erupted between A.D. 1085 and 1090. In areas where the resulting lava flows were greater than 30cm thick, people may have been forced to migrate, leaving behind long-established homesteads and agricultural fields.  On the positive side, lower elevation areas with cinder fall in the range of 3-10 cm would have become more suitable for farming, due to the beneficial effects of the cinder mulch. We talk with Volcanologist Michael Ort, who, together with a team of scientists, has unraveled the timing of these events and the implications of volcanic activity for humans at the time.

Living with Volcanoes

Utah is home to over 800 rock glaciers.  These masses of ice covered with rock debris are key to perennial streams and alpine biodiversity, but they are poorly understood.  We talk with Scott Hotaling, Assistant Professor in the Department of Watershed Sciences at Utah State University, who is studying the rare stonefly in order to gain understanding of how alpine streams are faring as glaciers recede under a warming and drying climate.

Rock Glaciers and Water Sustainability

Plants and insects are the key members of food webs because they are not only abundant and diverse, but they also provide food for many other animals higher up the food chain.  We talk with Moria Robinson, Assistant Professor of Biology at Utah State University, about variations in these food webs as climate in the western U.S. dries and warms.  In particular, we look at the interactions of rabbit brush and caterpillars.

Changing Food Webs

A podcast exploring the science and learning about the scientists from southeast Utah and the Colorado Plateau. Produced by Science Moab, KZMU, and USU Extension

Sculpting a Plateau

Science Moab

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