Grant Tyler J, Fisher Kelsey E, Krishnan Niranjana, Mullins Alexander N, Hellmich Richard L, Sappington Thomas W, Adelman James S, Coats Joel R, Hartzler Robert G, Pleasants John M, Bradbury Steven P
Research scientist, Iowa State University, Ames, Iowa.
Postdoctoral scholar, Iowa State University, Ames, Iowa.
Bioscience. 2022 Nov 9;72(12):1176-1203. doi: 10.1093/biosci/biac094. eCollection 2022 Dec.
The North American monarch butterfly (Danaus plexippus) is a candidate species for listing under the Endangered Species Act. Multiple factors are associated with the decline in the eastern population, including the loss of breeding and foraging habitat and pesticide use. Establishing habitat in agricultural landscapes of the North Central region of the United States is critical to increasing reproduction during the summer. We integrated spatially explicit modeling with empirical movement ecology and pesticide toxicology studies to simulate population outcomes for different habitat establishment scenarios. Because of their mobility, we conclude that breeding monarchs in the North Central states should be resilient to pesticide use and habitat fragmentation. Consequently, we predict that adult monarch recruitment can be enhanced even if new habitat is established near pesticide-treated crop fields. Our research has improved the understanding of monarch population dynamics at the landscape scale by examining the interactions among monarch movement ecology, habitat fragmentation, and pesticide use.
北美黑脉金斑蝶（Danaus plexippus）是《濒危物种法》规定的候选列入物种。多种因素与东部种群数量的下降有关，包括繁殖和觅食栖息地的丧失以及农药的使用。在美国中北部地区的农业景观中建立栖息地对于夏季繁殖数量的增加至关重要。我们将空间明确模型与实证迁移生态学和农药毒理学研究相结合，以模拟不同栖息地建立情景下的种群结果。由于它们的迁移性，我们得出结论，美国中北部各州的繁殖黑脉金斑蝶应该能够抵御农药使用和栖息地破碎化的影响。因此，我们预测，即使在经过农药处理的农田附近建立新的栖息地，成年黑脉金斑蝶的补充数量也可以增加。我们的研究通过考察黑脉金斑蝶迁移生态学、栖息地破碎化和农药使用之间的相互作用，增进了对景观尺度上黑脉金斑蝶种群动态的理解。
