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Funded Project |
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Funding Program:
Western Region Work Groups |
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Project Title:
Process-Based Modeling of Ecological Thresholds: Managing Bromus tectorum Invaded Communities |
Project Directors (PDs):
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Lead State: CO Lead Organization: Colorado State University |
| Undesignated Funding: $79,948 |
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Start Date: Jan-01-2008 End Date: Mar-14-2009 |
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Pests Involved: Bromus tectorum |
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Site/Commodity: Rangeland |
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Summary:
Land managers from Colorado and Wyoming have formed a diverse partnership to manage one of the most prolific invaders of western rangelands, Bromus tectorum. Bromus increases fire frequency, decreases wildlife and livestock habitat value and limits use of prescribed fire as a management tool. The project will develop IPM practices to restore and maintain ecosystem processes that sustain desirable ecological states in low production agroecosystems. A combination of process-based simulation modeling and field experiments will evaluate chemical control, seeding, and grazing to offset the effects of Bromus invasion under different fire histories. Bromus invasion risk assessment maps of southern Rocky Mountain production areas will be developed for rapid response and IPM prescription. WIPMC priorities will be met through studies and modeling of Bromus ecology and development of IPM practices, which will be disseminated in a publication, a stakeholder workshop and a website.
Objectives: Objective 1: Model impacts of Bromus invasion under an array of IPM and environmental conditions in the Southern Rocky Mountain Ecoregion by adapting SAVANNA, a spatially explicit process-based model. This addresses the WIPMC priorities to develop and implement models in pest management and will predict the effects of IPM practices on habitat for native species of concern. The information generated is the essential foundation for future work that will compare the costs, benefits and impacts of adopting these IPM practices. Objective 2: Measure effects of fire and IPM practices (herbicide application and seeding of native herbaceous species) on Bromus and the native plant community, and generate data vital to the accurate parameterization of the SAVANNA model. These data will inform management decisions and modeling exercises of Objective 1. This objective addresses the WIPMC priorities to study the biology and ecology of invasive species, and to develop and implement IPM tactics for the control of Bromus and protection of species of concern. Objective 3: Produce invasion risk assessment maps for Bromus in the Southern Rocky Mountain Ecoregion. This will address the WIPMC priority to assess the potential impacts of Bromus across production areas and enable rapid response in at risk areas. Objective 4: Publish findings in a peer-reviewed journal article and report results in a format accessible to managers on a website linked to the Mountain West IPM Network website. This addresses WIPMC priorities for outreach and demonstration activities specific to IPM implementation, and documentation of costs and benefits of implementing IPM practices. Objective 5: Conduct a workshop for extension agents, land managers, and the interdisciplinary research team focusing on presentation of project findings, feedback on the project website and developing the foundation of a decision support tool for managers. This addresses the WIPMC priority for outreach and demonstration activities specific to IPM. |
| Website: Process-Based Modeling of Ecological Thresholds: Managing Bromus tectorum Invaded Communities |
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