Source: OREGON STATE UNIVERSITY submitted to NRP
FINE FUELS MANAGEMENT TO IMPROVE WYOMING BIG SAGEBRUSH PLANT COMMUNITIES USING DORMANT SEASON GRAZING
Sponsoring Institution
National Institute of Food and Agriculture
Project Status
COMPLETE
Funding Source
Reporting Frequency
Annual
Accession No.
1019854
Grant No.
2019-68008-29914
Cumulative Award Amt.
$299,797.00
Proposal No.
2018-09115
Multistate No.
(N/A)
Project Start Date
Sep 1, 2019
Project End Date
Aug 31, 2023
Grant Year
2019
Program Code
[A1701]- Critical Agricultural Research and Extension: CARE
Recipient Organization
OREGON STATE UNIVERSITY
(N/A)
CORVALLIS,OR 97331
Performing Department
AG Animal & Rglnd Sciences Ext
Non Technical Summary
The sagebrush ecosystem is one of the most endangered ecosystems in America due to multiple threats, including non-native annual grass invasion and increased frequency and size of wildfires. Large wildfire increases the invasibility of sagebrush ecosystems on a massive geographical scale. Our goal is to implement an integrated ecological approach that combines extension with research that focuses on grazing to promote robust sagebrush plant communities within Oregon, Idaho, and Nevada. Our extension objectives contribute to the goal with at least: 1) 75% of the participants improving their knowledge of ecological outcomes related to dormant season grazing; 2) 75% of participants learning applied uses for remote sensing technologies and the implications to manage fine fuels; and 3) 75% of participants learning about basic rangeland ecology principles with at least 75 individuals using Google Earth Pro and GIS technologies to develop land management plans. Our research objectives test our hypothesis that dormant season grazing can be used at the landscape scale beyond traditional use to: 1) reduce fine fuels tolower fire risks benefiting less fire-adapted native plant species; and 2) promoteperennial bunchgrasses by taking advantage of phenological differences between native and invasive annual grasses, and by reducing the amount of plant litter. We address the need to develop management tools and strategies that positively impact sagebrush ecosystems through the development of dormant season grazing practices (Program Area Priorities 4); specifically, tools and strategies that promote plant communities that are resistant to invasive annual grasses within the sagebrush steppe.
Animal Health Component
100%
Research Effort Categories
Basic
(N/A)
Applied
100%
Developmental
(N/A)
Classification

Knowledge Area (KA)Subject of Investigation (SOI)Field of Science (FOS)Percent
1210790107080%
1210790203020%
Knowledge Area
121 - Management of Range Resources;

Subject Of Investigation
0790 - Rangelands, other;

Field Of Science
2030 - Geology; 1070 - Ecology;
Goals / Objectives
Our goal is to implement an integrated ecological approach that combines extension with research that focuses on grazing to promote robust sagebrush plant communities within Oregon, Idaho, and Nevada. Our extension objectives contribute to the goal with at least: 1) 75% of the participants improving their knowledge of ecological outcomes related to dormant season grazing; 2) 75% of participants learning applied uses for remote sensing technologies and the implications to manage fine fuels; and 3) 75% of participants learning about basic rangeland ecology principles with at least 75 individuals using Google Earth Pro and GIS technologies to develop land management plans. Our research objectives test our hypothesis that dormant season grazing can be used at the landscape scale beyond traditional use to: 1) reduce fine fuels tolower fire risks benefiting less fire-adapted native plant species; and 2) promoteperennial bunchgrasses by taking advantage of phenological differences between native and invasive annual grasses, and by reducing the amount of plant litter.
Project Methods
Our team will use multiple methods to implement the current extension and research project.Extension: Our team will equip land managers with science-based information and skills to promote a healthy sagebrush steppe using innovative extension curriculum within Canvas--a prominent learning management system. We have an established GEP-GIS Hybrid Extension Course with 60 permanently available videos related to rangeland principles and mapping using the free, user-friendly GEP program. The Extension team will train land managers how to use GIS tools to map in the context of a science-based ecological framework to build a rangeland management plan. To do so, our extension team will conduct at least 18 courses--consisting of 126 classes (3 hrs each). Furthermore, we will provide 12 annual Dormant Season Grazing Field Days with collaborators in ID, NV, and OR, and two Tri State Fine Fuels Management Field Days.Research: Our hypothesis that dormant season cattle grazing--between October 15th and February 28th--can be used at the landscape scale to: 1) reduce fine fuels enough tolower fire risks benefiting less fire-adapted native plant species; and 2) promoteperennial bunchgrasses by taking advantage of phenological differences between native and IAGs, and by reducing the amount of plant litter on the soil surface. There are three pastures within the project--McIntyre (MCI; 7,737 acres), South Camp Kettle (SCK; 6,100 acres), and Saddle Butte (SB; 9,329 acres). Together, the project team identified a target area within each pasture where to focus experimental treatments. Two exclosures with four treatments are randomly placed within the target area of each pasture.Field Measurements: Within each pasture, modified BLM Assessment, Inventory, and Monitoring Program (AIM) sampling methods will be used for fuel and vegetation measurements. Within each treatment plots (150 X 150 m), there will be three, 50 m transects to assess biomass (fine fuel loads), density, cover, plant height, and fuel continuity. Herbaceous biomass will be measured by clipping all material by functional group within 15, 0.20 m2 quadrats/plot. Herbaceous litter will also be collected in the 0.20 m2 quadrats. Samples will be dried for 48 hrs at 60°C to estimate fuel loads. Herbaceous fine fuel load (and litter) measurements will be collected prior to the grazing season and repeated for at least two years post-grazing treatment to evaluate plot production.Line-point intercept method will be used to estimate the cover of all plant species, litter, and ground surface along each of the 50 m transects. A pin flag will be dropped every 1-m for a total of 150 points per treatment plot. To measure the density and height of shrub species (< 15 cm in height), perennial bunchgrasses, perennial forbs, annual grasses, and annual forbs, ten quadrats (0.25 m2 quadrats) will be placed along each transect (30 total). Because of the low density of shrubs, shrub volume/biomass will be measured using 1-m belt transects along each line. Fuel continuity will be assessed using canopy gap measurements along all transects; canopy gaps will be measured between all species regardless of life span that are greater than 20 cm. All vegetation measurements will be collected pre-grazing treatment and repeated for at least two years post-treatment.Pasture-scale: live herbaceous fuel load: At the pasture-scale, we intend to utilize multi-temporal Landsat 8 and Sentinel-2 imagery to map the phenology of native and annual grasses as a proxy for live herbaceous fuel load. We will also utilize this method to assess changes in fuel load from treatments. Live herbaceous fuel load will be mapped at the 30 m scale by correlating vegetation indices from Landsat 8/Sentinel-2 to clipped plant material in the study plots. Landsat 8 satellite imagery is freely available every 16 days (dependent upon cloud cover) at 30 m, while the Sentinel-2 constellation, Sentinel-2A and Sentinel-2B imagery, is freely available every five days. Sentinel-2 imagery has similar visible, near-infrared (NIR), and shortwave-infrared (SWIR) bands as Landsat; however, there are four visible bands at 10 m; 6 NIR bands at 20 m; and 2 SWIR bands at 20 m.Plot-scale-moisture, biomass, height: Finer-scale estimates of fine fuels including herbaceous fuel moisture, biomass, and height will be made at the plot scale. These estimates will be made using a combination of fine-resolution aerial imagery, satellite imagery, and ground-based imagery, as available. The ground-based imagery may be collected using the Co-PIs Terrestrial Laser Scanner (TLS), Unmanned Aerial Systems (UAS, if available), and/or monopods outfitted with a digital camera. Imagery collected from the UAS or monopods will be collected in a fashion to support SfM photogrammetry techniques to derive point clouds. The point clouds will then be used to derive biomass (based on volume) and height.Data Interpretation: A randomized complete block design will be used to evaluate the effects of dormant- season grazing on fine fuels loads (biomass) and subsequent perennial bunchgrass density and cover in the field. Within the target area of each of the three pastures, our team randomly placed two exclosure (fenced) locations with four paddocks (treatments) that we assigned randomly. Each exclosure site (block) contains: 1) a permanent fence for no cattle grazing (No Graze), 2) a letdown fences allowing grazing during the traditional grazing season (Traditional Graze), 3) a letdown fences for dormant season grazing (Dormant Graze), and a contiguous non-fenced plot dormant season grazed beyond traditional use (Traditional + Dormant Graze). All statistical analyses will be conducted using linear mixed-effect models using R[89]. Effects of grazing treatments on fine fuel reduction and native plant performance will be analyzed using mixed model analysis of variance (ANOVA) for a randomized block design. Covariance structure will be estimated using the Akaike's information criterion, with Grazing treatments specified as fixed effects while Pasture and block specified as random effects. There will be two replicates on each pasture, and analysis between block variance will determine if we can combine all six blocks from the three pastures to give us six replicates. For all analysis of variance models, main and interaction effects and associated differences in treatment means will be considered significant at α = 0.05. When significant main or interaction effects are detected, we will use the LSMEANS procedure to determine differences in treatment means. The satellite imagery will be analyzed using Google Earth Engine, implementing time series and classification methods. Vegetation indices, reflectance values, and other metrics will be derived from the satellite imagery and input into a machine learning algorithm (e.g., random forests or other) to estimate levels of herbaceous fuel load. Plot-scale measurements of biomass and height will be estimated using derived point clouds from imagery. Biomass will be estimated using canopy volume from the point clouds. Height will be derived directly from the point clouds. Field-level plot measurements will be used to validate and model uncertainties. Fuel moisture will be estimated from vegetation indices at the plot scale and/or using time-series from Landsat/Sentinel. Fuel moisture will be empirically derived from the indices and field data. Evaluation: Research and extension activities will be evaluated by the advisory group and collaborators. Key project personnel and advisory group will review data produced from the research project. An Extension Evaluation Specialist will assess short-, medium-, and long-term outcomes for all extension events, including pre- and post-tests with a final survey a year after extension events--to evaluate increased knowledge and any change in behavior.

Progress 09/01/19 to 08/31/22

Outputs
Target Audience:The Fine Fuels Management Research and Extension Project targeted a broad audience through strategic efforts across the duration of the project. Our team reached: public land management agency personnel, federal and state wildlife agency personnel, public land grazing operators and private landowners, local natural resource agency and weed management personnel, livestock & natural resource extension faculty, natural resource non-profit organizations, the general public, policy makers, and the academic community. The target audience was focused in the states of Idaho, Oregon, and Nevada where research and extension efforts occurred. Our team shared information with a secondary audience beyond these three states. In particular, land managers, researchers, and non-profit organizations within the United States and beyond were targeted through the Society of Range Management presentations. From 2019-2020, our team targeted the above audiences through a variety of extension efforts. The four extension events included a Tri-State Fine Fuels Management Field Day, the Idaho Rangeland Fall Forum, the Idaho Range Livestock Symposium, and two Fine Fuel Management Annual Meetings between the Bureau of Land Management personnel and the Project Advisory Committee. In 2020, the global COVID pandemic limited in-person events and created opportunities to implement innovative content across different teaching modalities. From 2020-2021, our team continued providing our target audience with content. During the first year of the COVID pandemic, we provided Train-the-Trainer Rangeland Monitoring Workshop about Designing, Interpreting, and Applying Rangeland Monitoring to Management. Additionally, we provided the workshop, Establishing Land Management Plans with Useful GIS Tools, as well as held fine fuel management meetings with the Bureau of Land Management and the project advisory committee. From 2021-2022, the outreach focused on curriculum development to reach a broad audience interested in asynchronous fine fuels management content. In particular, we created the online course, Land Management Planning for Public Agencies and Profitable Ranches--a Self-Paced Course. Additionally, we created an online virtual fine fuels management field tour for our broad audience, and similar to previous years held fine fuel management meetings with the Bureau of Land Management and the project advisory committee. From 2022-2023, our team resumed both in-person and online efforts to disseminate project content and results. We adapted the online, asynchronous land management planning course, created a virtual tour highlighting fine fuels management efforts in Nevada, hosted a Tri-State Fine Fuels Management Field Day, and held administrative meetings with the Bureau of Land Management and the project advisory committee. Changes/Problems:There were several major changes/problems that required flexibility and adapting with the program director's consent. The primary problem was the COVID-19 pandemic, which severely limited the full execution of extension objectives as written in the proposal. We addressed the lack of in-person programming during the COVID-19 pandemic with innovative, online resources. From March 2020 through March 2022, our team developed online opportunities and resources to address the stated extension objectives. For example, we created online meetings, updates, and courses. Another major change in the project was when Co-PI, Dr. April Hulet, changed institutions, which resulted in the sub-award and services through the University of Idaho being discontinued prior to project closure. Dr. Hulet and Dr. Ghimire were important team members whose lost capacity reduced project team outcomes through extension and evaluation. What opportunities for training and professional development has the project provided?Our team provided several opportunities for training and professional development consistent with extension learning objectives. In-person training and professional development was limited during the COVID-19 pandemic so all efforts were diversified for synchronous participation--in-person and virtual. Furthermore, innovative extension efforts created trainings that could be implemented both synchronously and asynchronously. For example, the Land Management Planning for Public Agencies and Profitable Ranches was offered synchronously and asynchronously to address deficiencies in knowledge for rangeland and natural resource professionals in the Northern Great Basin. The extension course consists of over 100 videos and streamlined curriculum that walks land managers how to generate a land management plan using the science-based Threat-Based Land Management Tool developed at the Eastern Oregon Agricultural Research Center-Burns. Additionally, our team provided in-person training and professional development through a Tri-State Fine Fuels Management Field Tour, as well as through a Fine Fuels Management Virtual Tour Website hosted by the Oregon State University College of Agricultural Sciences. Both mediums highlighted fine fuels management on public lands and highlighted science-based presentations from leading grazing and ecological researchers. In-person field days focused on ecological outcomes on the extension and research site in southeastern Oregon, whereas the virtual field tour highlighted projects implemented in southwestern Idaho on public lands managed by the Bureau of Land Management. The website also includes how fine fuels are managed on public lands through the perspective of a mining company in northern Nevada. Biannual Fine Fuels Management Meetings with rangeland, wildlife, and natural resource professionals, as well as private land managers in Malheur County. The opportunity was to provide professional development information for public agency personnel and private land managers so they are able to make more informed decisions based on local data from the project. How have the results been disseminated to communities of interest?Results from the current project was distributed widely with the intent of reaching a broad and diverse audience. Our results were primarily distributed through in-person events. However, due to the COVID-19 pandemic, our team innovated ways to offer the content online via synchronous and asynchronous modalities. All asynchronous products, like the Land Management Planning resource and the Fine Fuels Management Virtual Tour, were highlighted on social media and Extension Service eNewsletters. What do you plan to do during the next reporting period to accomplish the goals? Nothing Reported

Impacts
What was accomplished under these goals? Our goal is to implement an integrated ecological approach that combines extension with research that focuses on grazing to promote robust sagebrush plant communities within Oregon, Idaho, and Nevada. To accomplish the project goal, our team incorporated extension and research objectives. It is important to note that the project was initiated just prior to the COVID-19 pandemic and face-to-face interaction was strictly limited by state policy. As a result, extension programming was modified to offer content through different teaching modalities. Our extension objectives contribute to the goal with at least: 1) 75% of the participants improving their knowledge of ecological outcomes related to dormant season grazing. Major extension activities completed include two Tri-State Field Days and a publicly accessible online Fine Fuels Management Virtual Tour for Idaho, Oregon, and Nevada. After analyzing pre- and post-test knowledge of topics with an evaluation instrument, at least 75% of the participants (n=113) increased their understanding of ecological outcomes related to dormant season grazing after visiting the research plot at the event. The second extension objective contributed towards out project goal by having 75% of participants learning applied uses for remote sensing technologies and the implications to manage fine fuels. Major activities towards supporting this learning objective included highlighting applied uses for remote sensing at two Tri-State Field Days, a Society for Range Management Virtual Annual Meeting, and a Train-the-Trainer Rangeland Monitoring Workshop about Designing, Interpreting, and Applying Rangeland Monitoring to Management. Our pre- and post-test instruments yielded at least 75 of participants (n=277) improved their understanding of applied uses for remote sensing technologies. Extension efforts highlighted the use of GIS tools, publicly available datasets (e.g., precipitation), and existing field data to estimate herbaceous litter biomass. The third extension objective was to have 75% of participants learning about basic rangeland ecology principles with at least 75 individuals using Google Earth Pro and GIS technologies to develop land management plans. Both public and private land managers used GIS tools to facilitate land management planning to improve rangeland conditions, which included managing fine fuels (i.e., invasive annual grasses). Activity towards supporting this learning objective included synchronous and asynchronous Land Management Planning workshops, a Society for Range Management Virtual Workshop at an annual meeting, and extension efforts at the Idaho Rangeland Symposium and the Idaho Fall Forum. Participants learned about the Threat-Based Land Management Tool, based out of the Eastern Oregon Agricultural Research Center-Burns, that equipped them with an ecological framework for land management planning. Pre-test and post-tests demonstrated participants improved their understanding of land management planning and systematically using GIS resources to identify and map ecological threats. Our research objectives test our hypothesis that dormant season grazing can be used at the landscape scalebeyond traditionaluse to: 1) reduce fine fuels tolower fire risks benefiting less fire-adapted native plant species; and 2) promoteperennial bunchgrasses by taking advantage of phenological differences between native and invasive annual grasses, and by reducing the amount of plant litter. Each year, out team collected field data at the experimental site. For three years, remote sensing data were collected to generate structural models to help estimate herbaceous biomass. After 2 yr of grazing treatments, biomass, density, cover, and fuel continuity did not differ between treatments (P > 0.05). However, biomass measurements were significantly different between years, which is likely due to greater than normal precipitation in 2019 and 2020. Between 2018 and 2019, annual grass biomass increased by 81% (666-1 212 kg ha−1) and perennial grass biomass increased by 165% (118-313 kg ha−1). Litter biomass decreased by approximately 15% in every year since 2018 (2 374, 2 012, and 1 678 kg ha−1 in 2018-2020). There were not significant differences in cover or density of annual and perennial grasses between treatments and years. Our results indicate that 2 yr may not be adequate time for dormant season grazing treatments to be effective in reducing the abundance of medusahead and that after 2 yr of treatments, dormant season grazing does not have a detrimental effect on perennial vegetation. Furthermore, we highlight the potential use and transferability of remote sensing-derived products to estimate litter biomass on sagebrush rangelands in southeastern Oregon, and link fire regime attributes (fire-free period) with litter biomass spatial patterns at the landscape scale. Each June, from 2018 to 2021, we measured litter biomass in 24 field plots (60 m × 60 m). Two remote sensing-derived datasets were used to predict litter biomass measured in the field plots. The first dataset used was the 30-m annual net primary production (NPP) product partitioned into plant functional traits (annual grass, perennial grass, shrub, and tree) from the Rangeland Analysis Platform (RAP). The second dataset included topographic variables (heat load index -HLI- and site exposure index -SEI-) computed from the USGS 30-m National Elevation Dataset. Through a frequentist model averaging approach (FMA), we determined that the NPP of annual and perennial grasses, as well as HLI and SEI, were important predictors of field-measured litter biomass in 2018, with the model featuring a high overall fit (R2 = 0.61). Model transferability based on extrapolating the FMA predictive relationships from 2018 to the following years provided similar overall fits (R2 ≈ 0.5). The fire-free period had a significant effect on the litter biomass accumulation on rangelands within the study site, with greater litter biomass in areas where the fire-free period was <10 years. We concluded that the proposed remote sensing-derived products could be a key instrument to equip rangeland managers with additional information towards fuel management, fire management, and restoration efforts.

Publications

  • Type: Journal Articles Status: Published Year Published: 2023 Citation: Price, W.J., Hulet, A., Jensen, K.S., Strand, E.K., Boyd, C.S., Davies, K.W., Johnson, D.D., Perryman, B.L., Di, Y. and Arispe, S.A. (2023). Managing Medusahead Using Dormant Season Grazing in the Northern Great Basin. Rangeland Ecology & Management, 90:146-156. https://doi.org/10.1016/j.rama.2023.04.006
  • Type: Journal Articles Status: Published Year Published: 2023 Citation: Fern�ndez-Guisuraga, J.M., Calvo-Galv�n, L., Fernandes, P.M., Hulet, A., Perryman, B., Schultz, B., Jensen, S., Enterkine J., Boyd, C., Davies, K.W., Johnson, D.D., Wollstein, K., Price, W.J., Arispe, S.A. (2023). Estimates of Fine Fuel Litter Biomass in the Northern Great Basin Reveal Increases During Short Fire-Free Intervals Associated with Invasive Annual Grasses. Science of the Total Environment, 860, 160634. https://doi.org/10.1016/j.scitotenv.2022.160634
  • Type: Journal Articles Status: Published Year Published: 2023 Citation: Arispe, S.A., Johnson, D.D., Wollstein, K.L., Hulet, A., Jensen, K.S., Shultz, B.W., Sprinkle, J.E., McDaniel, M., Ryan, T., Cunningham, S., McKenzie, M. (2023). Strategic Partnerships to Leverage Small Wins for Fine Fuels Management. Rangeland Ecology & Management 89:94-103. https://doi.org/10.1016/j.rama.2023.01.012
  • Type: Theses/Dissertations Status: Published Year Published: 2021 Citation: Price III, William J. Managing Fine Fuels Using Dormant Season Grazing: Improving Wyoming Big Sagebrush Communities in the Northern Great Basin. Diss. University of Idaho, 2021.


Progress 09/01/21 to 08/31/22

Outputs
Target Audience:The target audience reached by our efforts during this reporting period include public and private rangeland managers, as well as university students taking a rangeland ecology and managment course. Changes/Problems:Due to the COVID pandemic, a 12-month no-cost extension was requested during this reporting period. These extension program impacts will be recorded during the next reporting period. What opportunities for training and professional development has the project provided?Opportunities for training and professional development provided by the project included teh following activities: 1) Two meetings with the Vale District BLM, advisory committee, collaborating scientists, grazing operators, and Extension Service personnel. 2) Presentation to USDA-NIFA CARE personnel and other funded scientists. 3) Online training related to rangeland management planning for public agency personnel and private land managers. How have the results been disseminated to communities of interest?Results were disseminated to the communities of interest through in-person & virtual meetings, online websites, and through online Extension Service portal. What do you plan to do during the next reporting period to accomplish the goals?During the next reporting period, we will have short- and medium-term impact related to fine fuels management. In particular, we will have more data related to extension programming that only resumed after restrictive COVID regulations earlier this year.

Impacts
What was accomplished under these goals? The goal is to implement an integrated ecological approach that combines extension with research that focuses on grazing to promote robust sagebrush plant communities within Oregon, Idaho, and Nevada. To accomplish extension objectives, we created a self-paced,land management course aimed at equipping public and private land managers with skills to create land management plans using a science-based framework--Land Management Planning for Public Agencies and Profitable Ranches. Due to the COVID pandemic, our team created a website to host a virtual website whereby our audience is able to learn about fine fuels management themes important in the Northern Great Basin--Fine Fuels Management Virtual Tour. To accomplish research objectives, we collected and analyzed data testing our hypothesis that dormant season grazing can be used at the landscape scale beyond traditional use to improve degraded rangeland conditions. We implemented dormant season grazing during the 2021-2022 winter, from October 15, 2021 through February 28, 2022. During that time, nearly 2,146 AUMs removed nearly 815 tons of fine fuels from experimental pastures.

Publications


    Progress 09/01/20 to 08/31/21

    Outputs
    Target Audience:Since the last reporting period, our team has reached 141 participants. The target audience consisted of: Federal land management employees State land management employees Extension Service personnel University students Private land managers Note that state and local governments, as well as the public institutions involved in extension educatiion have implemented COVID-19 policies and/or mandates to promote public health. Therefore, our extension has primarily been virtually. Changes/Problems:There are two changes in the Extension Service approach our team is taking due to the current global COVID-19 pandemic. Public health mandates and university policy continue limiting in-person events so our team is converting them to online products that will be permanently available to participants. For example, the hybrid Google Earth Pro-GIS extension course is being developed to limit in-person contact. Participants will be able to enroll in the course from the comfort of their home. Next, the dormant season grazing field days in each of the three states will now be a virtual field day or tour. We are using innovative technologies to create a website where participants can experience the dormant season grazing endeavors from a distance. This change would allow participants permanent access to the content. What opportunities for training and professional development has the project provided? 1) JoshEnterkineand Monica Vermillion trained OSU and UI students on data collection. Monica completed her M.S. thesis and based on her thesis work, was hired by the USFS as a remote sensing scientist 2) Code and workflow have been developed in collaboration with other university employees to process Structure-from-Motion data, which will be published and shared freely How have the results been disseminated to communities of interest?Results were disseminated to the target audience through in-person and virtual meetings and events. What do you plan to do during the next reporting period to accomplish the goals?To accomplish goals in the next reporting period, we will focus on transferring extension content to online formats. It will allow us to comply with state, local, and university public health policy. Furthermore, we will report ecological outcomes associated with the grazing treatments we proposed.

    Impacts
    What was accomplished under these goals? The sagebrush ecosystem occupied over 62 million hectares across the western U.S. and southwestern Canada and is one of the world's most imperiled ecosystems.Non-native annual grass invasion, increased frequency and size of wildfires endanger the sagebrush ecosystem. Our team has implemented anextension eventsin Nevada, Oregon, and Idaho, and a research project in Oregon to mitigate these negative ecological threats. Since the last reporting period, we have reached 141 public and private land managers to increase their understanding and skills related to ecological threats across the sagebrush steppe. Furthermore, grazing treatments associated with the research objectives removed nearly 700 tons of fine fuels that cannot carry over to the next fire season. Due to dormant season grazing, five grazing operators were able to save $80,000 in costs associated with grazing during the dormant season on public rangelands. Our goal is to implement an integrated ecological approach that combines extension with research that focuses on grazing to promote robust sagebrush plant communities within Oregon, Idaho, and Nevada. EO 1:75% of the participants improving their knowledge of ecological outcomes related to dormant season grazing 1) Major activities completed: Two meetings with public and privateland managers 2) Data collected: understanding of ecological outcomes related to dormantseasongrazing 3) Summary statistics and discussion of results: Update related to dormant season grazing project 4) Key outcomes:20 participants increased their knowledge of dormant season grazing outcomes. EO 2:75% of participants learning applied uses for remote sensing technologies and the implications to manage fine fuels 1) Major activities completed: 1 Extension Event 2) Data collected: Understanding of GIS and remote sensing, as well as the direct application at the landscape level to monitor rangeland health. 3) Summary statistics and discussion of results: 17 participants increased their skill and understanding. 4) Key outcomes or other accomplishments realized: Participants increased their understanding of annual grass life-cycle and their skills to identify ecological threats. EO 3:75% of participants learning about basic rangeland ecology principles with at least 75 individuals using Google Earth Pro and GIS technologies to develop land management plans 1) Major activities completed: One workshop at the Society for Range Management. 2) Data collected: pre- and post-test knowledge related too GIS & remote sensing application while developing land management plans. 3) Summary statistics and discussion of results: 124 participants 4) Key outcomes or other accomplishments realized.More than 75% of participants increased theirunderstanding of using Google Earth Pro to develop land management plans. Our research objectives test our hypothesis that dormant season grazing can be used at the landscape scalebeyond traditionaluse to: RO1:reduce fine fuels tolower fire risks benefiting less fire-adapted native plant species 1) Major activities completed: Grazingressearchproject 2) Data collected: herbaceous and shrub cover, density, gap, biomass, and height. We refined our biomass model using the June 2020 image dataset and found our predictive capability to be lower than in the June 2019 dataset. We developed a number of approaches for translating volume fromSfMto biomass and found that our biggest inhibitor is identifying the ground surface. Sensitivity analyses have been performed to determine the most adequate quality level (ergo processing time) that can capture plant volumes. We further refined the sampling frames for field data collection so that processing is more reliable and more readily automated, and importantly tracks and records error metrics and processing steps for quality control and repeatability. Analysis has been refined to include a method to classify the ground/litter surface in the point clouds enabling separate volumetric calculations and establishing a greater understanding of the relationship between volumetric estimations and biomass measurements. 3) Summary statistics and discussion of results: Nearly 750 tons of fine fuels were removed from the treatment area. 4) Key outcomes or other accomplishments realized. While there were no significant differences in either herbaceous or shrub measurements, it is important to point out treatments are not negatively affecting plant response. RO2:promoteperennial bunchgrasses by taking advantage of phenological differences between native and invasive annual grasses, and by reducing the amount of plant litter 1) Major experiment conducted: We implemented the collection of data to determine if treatments were moving plants in a trajectory related to the researchhyopothesis. 2) Data collected:Data collected: herbaceous and shrub cover, density, gap, biomass, and height. 3) Summary statistics and discussion of results:The results after two years suggest that current stocking rate for all treatments will not: 1) reduce annual grass fine fuels, and 2) promote perennial grasses by taking advantage of phenological differences between perennial and winter annual grasses. Our results also suggest that the current stocking rate is not detrimental to perennial vegetation. The annual grass and litter biomass and cover results suggest that for dormant season grazing to successfully reducemedusahead, it is necessary to conduct grazing treatments for more than two years. 4) Key outcomes or other accomplishments realized: Current grazing treatments are not detrimental to plant communities within our system.

    Publications

    • Type: Journal Articles Status: Under Review Year Published: 2021 Citation: Managing Medusahead Using Dormant Season Grazing in the Northern Great Basin Authors: William John Price; April Hulet; K. Scott Jensen; Eva K. Strand; Chad S. Boyd; Kirk W. Davies; Dustin D. Johnson; Barry Perryman; Yanming Di; Sergio A. Arispe


    Progress 09/01/19 to 08/31/20

    Outputs
    Target Audience:The target audience reached by extension efforts are from Oregon, Idaho and Nevada. Specifically, the current reporting targeted cattle producers, federal and state public land managers, allied industry representatives, extension educators, and the general public interested in the sagebrush steppe health. Changes/Problems: The global COVID-19 pandemic provides a major challenge to all university and agency personnel collaborating on the current grant. Statewide ordinances are limiting in-person activities and travel restrictions are implemented at the university level. Due to the remote location, research is being fully implemented at the experimental site. However, extension events are limited from March 16th through the present. Our team is building online extension curriculum to follow through with extension efforts associated with our extension goals. The Google Earth Pro-Geographical Information System Extension Curriculum will be deployed as an online non-credit course in February 2021. The pandemic has limnited acces to computers and data processing, specifically for remote sensing procedures at Boise State University. We are currently working through the obstables to increase our efficiency. Additionally, inclement weather during fall 2019 caused our team to postpone an Oregon Fine Fuels Field Day Extension event that was planned with committed collaborators. The field day was originally postponed until Spring 2020 and then the COVID-19 prevented that event from occuring. Finally, measuring moisture using remote sensing and rangeland procedures was inefficient and unreliable. After communicating with the NIFA Program Manager, we were encouraged to move forward without the moisture component. What opportunities for training and professional development has the project provided? Monica trained an undergraduate student researcher (Juliette Flowers) on data and image processing as part of the Structure-from-Motion workflow development. How have the results been disseminated to communities of interest?The results have been disseminated to communities of interest. Specifically, information has been shared with public land management agencies, research scientists, allied-industry personnel, non-profit organizations, and the general public. Events include: Tri-State Fine Fuels Management FIeld Day (Oregon) Rangeland Fall Forum (Idaho) Idaho Range Livestock Symposium What do you plan to do during the next reporting period to accomplish the goals? · Complete data analysis for vegetation and fuel data (2018-2020) · Complete MS thesis · Submit manuscript to Rangeland Ecology and Management focused on the fuel and vegetation short-term response to dormant season grazing. · Collect fuel and vegetation data June 2021. · Hold an annual fine fuels management field day in Pocatello, ID (Fall 2021). Train land managers through Google Earth Pro-GIS Extension Course

    Impacts
    What was accomplished under these goals? Our extension objectives contribute to the goal with at least: 1) 75% of the participants improving their knowledge of ecological outcomes related to dormant season grazing; Of the 90 participants at two extension events, 100% improved their knowledge of ecological outcomes related to dormant season grazing. 2) 75% of participants learning applied uses for remote sensing technologies and the implications to manage fine fuels; and of the 25 participants at one extension event, 100% improved their understanding of applied uses for remote sensing technologies. 3) 75% of participants learning about basic rangeland ecology principles with at least 75 individuals using Google Earth Pro and GIS technologies to develop land management plans. no data to report. Our research objectives test our hypothesis that dormant season grazing can be used at the landscape scale beyond traditional use to: 1) reduce fine fuels tolower fire risks benefiting less fire-adapted native plant species; and · Fuel and vegetation measurements were completed in June 2019 and 2020. These include plant density, cover, plant height, fuel continuity, and biomass. · A description of environmental variables of research locations was extracted using ArcGIS tools (including slope, aspect, and solar radiation). · Soil pits were described for research locations and soil texturing is currently being conducted at the UI-Boise laboratory using the hydrometer method. · Precipitation data was retrieved from the Utah Climate Center website for the Owyhee Dam Global Historical Climatology Network weather station. · Dormant season grazing was implemented October 2019. · Attended research meetings with partners including the BLM, ranchers, and advisors. · Worked with ranchers to determine dormant season grazing numbers, collect animal unit months from ranchers for traditional grazing period and dormant season grazing period. 2) promoteperennial bunchgrasses by taking advantage of phenological differences between native and invasive annual grasses, and by reducing the amount of plant litter. · Exotic Annual Grass Cover: Exotic annual grass cover increased in South Camp Kettle and Saddle Butte pastures, and slightly decreased in McIntyre. When comparing exotic annual grass cover at the treatment level (no graze, traditional grazed, dormant grazed, and traditional + dormant grazed), an increase between 5 and 10% was measured across all four treatments. Species composition by functional group remained relatively unchanged from 2018 to 2019, with medusahead (Taniatherum caput-medusae) accounting for 82% and 80% of hits, and cheatgrass (Bromus tectorum) accounting for 10% and 16% in each year. Field brome (Bromus arvensis) and ventenata (Ventenata dubia) were present but minimal both years. Native Perennial Grass Cover: There were small changes in the cover of native perennial grasses at the pasture level, and cover stayed similar across all four treatments. The largest change was the increase of cover of western wheatgrass (Pascopyrum smithii); in 2018 it was not measured, and in 2019 it had an average cover of 3.3% across all six sites. This change was most prominent in the Saddle Butte pasture where it went from not being measured in 2018 to having 10% cover in the southern exclosure and 8.8% cover in the northern exclosure. Sandberg bluegrass (Poa secunda) decreased in total cover from 5.7% to 3.1%. Bluebunch wheatgrass (Pseudoroegneria spicata) and Idaho fescue (Festuca idahoensis) stayed consistent from 2018 and 2019 in both functional group composition and total cover. Litter Cover: At the pasture level, litter decreased on 5 out of the 6 pastures and ranged from a 1% to 12% decrease. At South Camp Kettle South litter cover increase by 17%. At the treatment level, the largest change that was measured was in the no graze, where litter cover decreased by ~12%. · Both annual and perennial grass biomass increased in 2019 compared to 2018. This increase was seen in all three pastures and all four treatments. Difference may be due to a number of factors including, but limited to, precipitation, rotational grazing, and the timing of data collection. Annual grass biomass increased by 344 kg/ha, 1060 kg/ha, and 183 kg/ha between 2018 and 2019 at South Camp Kettle, Saddle Butte, and McIntyre, respectively. Annual grass biomass on the No Graze treatment increased by 864 kg/ha from 2018 and 2019. Grazing treatments on average increased in annual grass biomass by 417 kg/ha between the two years; the Tradition + Dormant grazing treatment had the smallest increase of annual grass biomass (299 kg/ha between the two years). Perennial grass biomass also increased from 2018 to 2019. At South Camp Kettle, perennial grass biomass increased from 74 kg/ha to 153 kg/ha. At Saddle Butte there was an increase of 296 kg/ha between the two years, and at McIntyre there was an increase of 200 kg/ha. Perennial grass biomass increased by 253 kg/ha on the No Graze treatment plots, and on average 171 kg/ha on the three grazing treatments. Litter biomass is of particular interest due to medusahead's ability to germinate within the litter and its strong contribution to fuel continuity across the landscape. Litter biomass increased by 284 kg/ha at South Camp Kettle from 2018 to 2019. On Saddle Butte and McIntyre, litter biomass decreased by 1028 kg/ha and 450 kg/ha, respectively, between 2018 and 2019. Across all treatment litter biomass decreased. On the No Graze treatment, litter went from 2467 kg/ha in 2018 to 2092 kg/ha in 2019. When grazed once (either Traditional or Dormant season), there was an average decrease of 256 kg/ha. The Traditional + Dormant treatment decreased litter biomass by 704 kg/ha from 2018 to 2019.

    Publications

    • Type: Theses/Dissertations Status: Under Review Year Published: 2020 Citation: Vermillion, Monica, A Sense of Scale: Mapping Exotic Annual Grasses with Satellite Imagery Across a Landscape and Quantifying their Biomass at a Plot Level with Structure from Motion in a Semi-Arid Ecosystem, MS Geophysics, Boise State University, August 2020
    • Type: Conference Papers and Presentations Status: Published Year Published: 2020 Citation: Price, W., Hulet, A., and Arispe, S.A. (2020). Fine Fuels Management to Improve Wyoming Big Sagebrush Plant Communities Using Dormant Season Grazing. In: 73rd Society for Range Management Annual Meeting. Denver, CO; February 16-20, 2020.
    • Type: Conference Papers and Presentations Status: Published Year Published: 2019 Citation: Johnson, K., Price, W., Hulet, A., Perryman, B., Glenn, N., and Arispe, S.A. (2019). Dormant Season Grazing to Manage Biomass on Public Lands within the Sagebrush Steppe of Southeastern Oregon. In: Texas Section Society for Range Management Annual Meeting. Kerrville, TX; October 9-11, 2019.
    • Type: Conference Papers and Presentations Status: Published Year Published: 2020 Citation: Malliaras, A., Mikesell, D., Champion, J., and Arispe, S.A. (2020). Characterizing Cattle Behavior in the Rugged Rangeland of SE Oregon Using Low-Cost GPS Collars. In: 73rd Society for Range Management Annual Meeting. Denver, CO; February 16-20, 2020.
    • Type: Conference Papers and Presentations Status: Published Year Published: 2020 Citation: Malliaras, A.N., Mikesell, D., Champion, J., and Arispe, S.A. (2020). Characterizing Cattle Behavior in the Rugged Rangeland of SE Oregon Using Low-Cost GPS Collars. In: 2020 Undergraduate Research Showcase. 112.
    • Type: Conference Papers and Presentations Status: Published Year Published: 2020 Citation: Managing Fine Fuels at the Landscape Scale on Public Lands Using Dormant Season Grazing. In: Targeted Grazing to Reduce Fine Fuels in the Great Basin Symposium at the 73rd Society for Range Management Annual Meeting. Denver, CO, February 16-20, 2020.