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Evaluating the Suitability of Roadway Corridors for Use by Monarch Butterflies (2020)

Chapter: Appendix A - Manager Workflow Diagram: Use of Roadside Habitat for Monarchs Decision Support Tools

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Page 105
Suggested Citation:"Appendix A - Manager Workflow Diagram: Use of Roadside Habitat for Monarchs Decision Support Tools." National Academies of Sciences, Engineering, and Medicine. 2020. Evaluating the Suitability of Roadway Corridors for Use by Monarch Butterflies. Washington, DC: The National Academies Press. doi: 10.17226/25693.
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Page 105
Page 106
Suggested Citation:"Appendix A - Manager Workflow Diagram: Use of Roadside Habitat for Monarchs Decision Support Tools." National Academies of Sciences, Engineering, and Medicine. 2020. Evaluating the Suitability of Roadway Corridors for Use by Monarch Butterflies. Washington, DC: The National Academies Press. doi: 10.17226/25693.
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Page 106

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A P P E N D I X A Manager Workflow Diagram: Use of Roadside Habitat for Monarchs Decision Support Tools A-1

DETAILED WORKFLOW ROADSIDE MONARCH HABITAT ASSESSMENT TOOL USERS • Roadside Vegetation Managers • Biologists/Environmental Compliance staff • Natural Resource specialists & seasonal staff USE CASES • Identify roadside ROWs for which revegetation is already planned due to road work and which should include milkweed and nectar producing forbs • Identify currently vegetated roadside ROWs for creation or enhancement of monarch habitat • Identify roadside ROWs to exclude from creation or enhancement of monarch habitat due to threats • Estimate progress towards quantitative objectives (1 milkweed per 11 ft of roadway) or compliance requirements (e.g., CCAA) • Inventory existing monarch habitat within a road system Strategy/PrioritizationCall to Action Exploration Discovery Assessment Implementation Execution Adaptation Product A Product B Product C Product D Where should I look? What’s actually there? What does it mean? What should I do? The user—either a decision maker or someone hoping to influence a decision maker—must first determine that incorporating monarch habitat into ROW management is worth exploring. An interest in conservation, a mandate, or regulatory requirements might serve as the call to action. The user will explore existing guidance and tools to identify one that is compatible with their objectives. If the user discovers the NCHRP toolset and determines it is the most suitable, they will access the tools in preparation for use. Typically, managers choose between one of two strategies: (1) install habitat in appropriate areas as opportunities arise or (2) alter management to promote habitat across the road system. Users will use Product A to evaluate suitable locations and prioritize actions. The information provided by Product A will inform where in- situ habitat assessments will occur. Product B provides the protocol and data collection forms for habitat assessments. The user will develop an assessment plan, considering personnel, timing, materials, and budget. Often but not always, the user will recruit others to execute the assessment plan. Once priority locations are identified, field data collectors will collect necessary materials, determine an efficient sampling route, travel to the sample points, establish plots, collect data, and upload collected data through the mobile collection app. If using datasheets, they will transfer data to the app after data is collected. The user will need to access the field data and translate those data into interpretable information. Product C aggregates data, calculates habitat function, and presents this information to the user in an interpretable format. If necessary, the user can then share this information with the decision maker. The user, in coordination with the decision maker if necessary, .will determine a plan of action for installing habitat or altering management prescriptions. Product D provides best management practices and site-specific management actions based on the results of Product C. Repeated assessments are conducted to evaluate effectiveness. The user will need to store data in a secure, accessible location for future use. Assessments repeated over time can be used to adaptively manage the monarch habitat strategy. The initial strategy should be revisited at least annually to maximize the effectiveness of the strategy.

Next: Appendix B - User Guide for the Landscape Prioritization Model for Roadside Habitat for Monarchs »
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Roadsides provide promising monarch habitat as they frequently contain nectar and host plants; however, they also present a range of risks, including pesticide spillover, vehicle collisions, contaminant runoff, and non-native vegetation.

The TRB National Cooperative Highway Research Program's NCHRP Research Report 942: Evaluating the Suitability of Roadway Corridors for Use by Monarch Butterflies provides guidance for roadside managers to determine the potential of their roadway corridors as habitat for monarch butterflies.

The report also includes several tools and decision-support mechanisms to optimize habitat potential in a manner that is compatible with the continued operation and maintenance of the roadside.

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