Evaluating the Suitability of Roadway Corridors for Use by Monarch Butterflies

National Academies of Sciences, Engineering, and Medicine

doi:10.17226/25693

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Evaluating the Suitability of Roadway Corridors for Use by Monarch Butterflies

(2020)

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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.

Contributor(s): National Academies of Sciences, Engineering, and Medicine; Transportation Research Board; National Cooperative Highway Research Program; Alison B. Cariveau, Wendy Caldwell, Eric Lonsdorf, Chris Nootenboom, Karen Tuerk, Emilie Snell-Rood, University of Minnesota; Environmental Incentives Eric Anderson; Kristen A. Baum, Oklahoma State University; Jennifer Hopwood, Xerces Society for Invertebrate Conservation; University of Wisconsin Karen Oberhauser

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Suggested Citation

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. https://doi.org/10.17226/25693.

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Publication Info

208 pages | 8.5 x 11 | DOI: https://doi.org/10.17226/25693

Chapters		skim
Front Matter	i-x
Summary	1-6
Chapter 1 - Background	7-14
Chapter 2 - General Research Approach	15-19
Chapter 3 - Product A: Landscape Prioritization Model for Roadside Habitat for Monarchs	20-28
Chapter 4 - Product B: Rapid Assessment of Roadside Habitat for Monarchs	29-46
Chapter 5 - Product C: Roadside Monarch Habitat Calculator	47-61
Chapter 6 - Product D: Best Management Strategies and Decision Support	62-95
Chapter 7 - Conclusions and Suggested Research	96-98
Bibliography	99-103
Acronyms	104-104
Appendix A - Manager Workflow Diagram: Use of Roadside Habitat for Monarchs Decision Support Tools	105-106
Appendix B - User Guide for the Landscape Prioritization Model for Roadside Habitat for Monarchs	107-112
Appendix C - Rapid Assessment of Roadside Habitat for Monarchs: Field Protocol and Datasheet	113-122
Appendix D - User Guide for Rapid Assessment of Roadside Habitat for Monarchs and Habitat Calculator: Monarch Habitat Evaluator Tool	123-158
Appendix E - Best Management Practices Resource Sheet: Monarch Butterflies, Weeds, and Herbicides	159-164
Appendix F - Regionally Specific Roadside Milkweed Recognition Fact Sheets	165-200

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