
Fire in the Southwest Series, Ep.2: The Grassification of the Sonoran Desert with Ecologist Mary Lata
06/11/24 • 46 min
What is it like to watch vegetation type-conversion in real time? How are invasive grasses changing the ecology of the desert and broader Southwest? What's being done to protect and restore Southwest ponderosa pine forests?
This episode with Tonto National Forest fire ecologist Mary Lata dives into the fire regimes of the Southwest, how they're changing by the year, how invasive grasses are influencing those changes, and particularly how she's beginning to see more fire in the Sonoran Desert, where fire was not historically common. We also spoke about her work within the Four Forest Restoration Project, which aims to restore and protect the significant ponderosa pine forests within the Apache-Sitgreaves, Coconino, Kaibab and Tonto national forests.
Mary was preparing for a public meeting the day of our conversation and had a few great slides that she showed me during our conversation, so I've uploaded the full video of our conversation to Youtube for folks who would like some more context for the topics we discussed in the podcast.
This episode and our entire series on Fire in the Southwest was made possible with support from The Southwest Fire Science Consortium and the Arizona Wildfire Initiative.
Timstamps:
01:11 - Introduction
05:42 - Mary's Background and Career
10:04 - Four Forest Restoration Initiative
13:05 - Growing up Near Badlands National Park
15:33 - Different Ecosystems and Fire Regimes of the Southwest
17:19 - The Sonoran Desert
19:39 - Witnessing Desert Conversion Over Time
20:14 - Should Human-Caused Ignitions Be Part Of A Fire Regime?
22:05 - Lightning Caused Fires Versus Human Caused Fire
23:52 - Mary's Love of Nebraska
27:01 - Grasslands In The Great Plains
30:36 - Current Restoration Work and Climate Change Impacts on Southwest Fire Regimes
34:11 - What is Assisted Migration and Can It Help The Southwest?
38:04 - The Changing Role Of Disturbance In Grassland Systems
39:24 - Grassification of the Sonoran Desert.
45:13 - Outro
What is it like to watch vegetation type-conversion in real time? How are invasive grasses changing the ecology of the desert and broader Southwest? What's being done to protect and restore Southwest ponderosa pine forests?
This episode with Tonto National Forest fire ecologist Mary Lata dives into the fire regimes of the Southwest, how they're changing by the year, how invasive grasses are influencing those changes, and particularly how she's beginning to see more fire in the Sonoran Desert, where fire was not historically common. We also spoke about her work within the Four Forest Restoration Project, which aims to restore and protect the significant ponderosa pine forests within the Apache-Sitgreaves, Coconino, Kaibab and Tonto national forests.
Mary was preparing for a public meeting the day of our conversation and had a few great slides that she showed me during our conversation, so I've uploaded the full video of our conversation to Youtube for folks who would like some more context for the topics we discussed in the podcast.
This episode and our entire series on Fire in the Southwest was made possible with support from The Southwest Fire Science Consortium and the Arizona Wildfire Initiative.
Timstamps:
01:11 - Introduction
05:42 - Mary's Background and Career
10:04 - Four Forest Restoration Initiative
13:05 - Growing up Near Badlands National Park
15:33 - Different Ecosystems and Fire Regimes of the Southwest
17:19 - The Sonoran Desert
19:39 - Witnessing Desert Conversion Over Time
20:14 - Should Human-Caused Ignitions Be Part Of A Fire Regime?
22:05 - Lightning Caused Fires Versus Human Caused Fire
23:52 - Mary's Love of Nebraska
27:01 - Grasslands In The Great Plains
30:36 - Current Restoration Work and Climate Change Impacts on Southwest Fire Regimes
34:11 - What is Assisted Migration and Can It Help The Southwest?
38:04 - The Changing Role Of Disturbance In Grassland Systems
39:24 - Grassification of the Sonoran Desert.
45:13 - Outro
Previous Episode

Fire in the Southwest Series, Ep. 1: Southwest Fire Regimes and Post-Fire Community Support with Mary Stuever
Welcome to the first part of our six-episode series all about the Southwest, sponsored by the Southwest Fire Science Consortium and the Arizona Wildfire Initiative!
In this episode, which is serving as an introduction to the series, we spoke with Mary Stuever, who is the Cimarron District Forester for New Mexico Forestry Division. Mary has a breadth of experience across disciplines in the fire world, which is well-reflected in our conversation. She's worked in suppression, prevention, fire ecology, community education, post-fire support and public information, among other roles in her long career in fire. As such, we touched on everything from her background in suppression (and subsequent health problems from smoke exposure) to her time providing post-fire community support for the folks in Mora, NM, which was devastated by the 2022 Calf Canyon/Hermits Peak Fire. Mora was not only impacted by the fire itself, but also by subsequent flooding and debris flows that destroyed wells, choked out acequias (critical agricultural waterways) and destroyed untold homes, properties and livelihoods.
Mary reflected on the situation she found herself in in such a devastating post-fire environment, including what was needed and opportunities she saw for helping other communities prepare for similar situations. She also gave us a quick Southwest Fire Ecology 101 lesson, and was all around a great guest to chat about the huge diversity of wildfire issues facing the Southwest right now. Most of the topics we spoke to will be elaborated on in greater detail in upcoming episodes, so we hope you'll stick around and listen in as we release more episodes of this series over the next six weeks.
For more information on post-fire impacts in Mora, check out some of the fantastic reporting Patrick Lohmann of Source NM did both during and after the fire.
For more information about our sponsor for this series, the Southwest Fire Science Consortium, check out their website, which is chock-full of resources related to Southwest fire ecology, research, management and communications.
You can learn more about the Arizona Wildfire Initiative and their great work in community outreach, science communications and fire education on their website.
Timestamps:
08:55 - Role Of Fire In The Landscape
10:10 - Health Issues in Wildland Firefighting
12:13 - Basing Operational Decisions On Smoke Exposure
14:18 - Fire Ecology of the Southwest 101
23:22 - Intersecting Cultures And Fire Management in the Southwest
25:34 - Ecosystem-Specific Challenges and Different Tactics For Different Landscapes
27:51 - Mary's Experience Providing Post-Fire Support In Mora, NM (Following Calf Canyon/Hermits Peak)
36:29 - Post-Fire Recommendations For The Southwest
40:49 - Utilizing Art And Theater For Fire Education
44:03 - Bringing Community Members In As Partners
Next Episode

Fire in the Southwest Series, Ep. 3: Integrating Indigenous Knowledge into Western Fire Management with Jon Martin
Welcome to our third episode of our Fire in the Southwest series! In this episode, we spoke with Jon Martin, who is the Director of Native American Forest and Rangeland Management Programming at the Ecological Restoration Institute at Northern Arizona University. Jon spent three decades working in forestry before retiring, and now uses his extensive interagency background to find pathways that can help tribes achieve their management goals within a Western fire management framework.
This topic is especially prescient right now, as the Wildfire Commission Report was explicit in its recommendations to incorporate more Indigenous knowledge into land management (see: recommendations 12, 15, 16). However, while this directive is a step in the right direction, actually accomplishing it will require overcoming significant workforce and budget constraints at the ground level, especially within tribal communities.
Jon and Amanda spoke about what this integration of different management practices can look like, how to overcome those barriers, the differences between cultural and agency fire, as well as the fundamental question of whether or not the differences between cultural and agency fire can be meaningfully reconciled. Jon also provided a great example of this integration working (the San Carlos Apache Tribe's use of Crisis Strategy/Infrastructure Bill funding). Finally, we wrapped the episode up with a discussion about the nature of federal land agency employment, which all but requires employees to move locations every 3-5 years to move up in their careers. Jon spoke about how the collaborative/shared stewardship pathway that is needed to meaningfully integrate Indigenous management into Western management requires a wholesale commitment to developing interagency relationships, and how this should be a major priority moving forward.
"It’s not about going out and managing forests, silvicultural prescription or even forest management," Jon said in our conversation. "It’s become all about people management, almost a social science. I think people are starting to realize that. It’s a softer approach but it’s very real.”
This conversation and the rest of our Fire in the Southwest series is supported by the Southwest Fire Science Consortium, as well as the Arizona Wildfire Initiative. We're so grateful for their support!
Time stamps:
06:23 - Jon's Background and Navajo Upbringing
09:42 - Northern Arizona University And Its Programs
11:51 - Native American Forest And Rangeland Management Program
13:00 - San Carlos Apache Tribe
14:12 - Western Land Management Agencies Working With Tribes
15:38 - Opportunities And Funding Becoming Available To Bolster Tribal Management
18:45 - Fire History and Research in the Piñon Juniper Ecosystems of the Southwest
20:38 - Indigenous Fire History In Piñon Juniper Ecosystems
22:41 - Culturally Informed Management In Higher Elevation Forests
25:56 - Increasing Acknowledgement Of Cultural Burning
26:33 - Wildland Fire Management And Mitigation Report Directives for Indigenous Burning
28:10 - San Carlos Apache Tribe—Wildfire Crisis Strategy Funding Leading to Tribal Management Success Story
29:34 - Collaborative Efforts Require Long-Term Commitments and Relationship Building
33:50 - Tribal Management Is Inherently Collaborative
34:20 - Jon's Career Wins
37:32 - End
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