Dispersal stabilizes coupled ecological and evolutionary dynamics in a host-parasitoid system

• 成果类型: Article
• 署名作者: Nell, Lucas A.; Kishinevsky, Miriam; Bosch, Michael J.; Sinclair, Calvin; Bhat, Karuna; Ernst, Nathan; Boulaleh, Hamze; Oliver, Kerry M.; Ives, Anthony R.
• 署名单位: University of Wisconsin System; University of Wisconsin Madison; University System of Georgia; University of Georgia; Stanford University; United States Department of Agriculture (USDA)
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-8555
• DOI: 10.1126/science.adg4602
• 发表日期: 2024-03-15
• 页码: 1240-1244
• 关键词: rapid evolution; pea aphids; population; persistence; resistance; selection; models

摘要

When ecological and evolutionary dynamics occur on comparable timescales, persistence of the ensuing eco-evolutionary dynamics requires both ecological and evolutionary stability. This unites key questions in ecology and evolution: How do species coexist, and what maintains genetic variation in a population? In this work, we investigated a host-parasitoid system in which pea aphid hosts rapidly evolve resistance to Aphidius ervi parasitoids. Field data and mathematical simulations showed that heterogeneity in parasitoid dispersal can generate variation in parasitism-mediated selection on hosts through time and space. Experiments showed how evolutionary trade-offs plus moderate host dispersal across this selection mosaic cause host-parasitoid coexistence and maintenance of genetic variation in host resistance. Our results show how dispersal can stabilize both the ecological and evolutionary components of eco-evolutionary dynamics.