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Folders: ROOT > ScienceBase Catalog > National and Regional Climate Adaptation Science Centers > Midwest CASC > FY 2020 Projects > Evaluating the Role of Climate on Midwestern Butterfly Trajectories, Monarch Declines, and the Broader “Insect Apocalypse” ( Show direct descendants )
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ROOT _ScienceBase Catalog __National and Regional Climate Adaptation Science Centers ___Midwest CASC ____FY 2020 Projects _____Evaluating the Role of Climate on Midwestern Butterfly Trajectories, Monarch Declines, and the Broader “Insect Apocalypse” Filters
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Mounting evidence shows overall insect abundances are in decline globally. Habitat loss, climate change, and pesticides have all been implicated, but their relative effects have never been evaluated in a comprehensive large-scale study. We harmonized 17 years of land use, climate, multiple classes of pesticides, and butterfly survey data across 81 counties in five states in the US Midwest. We find community-wide declines in total butterfly abundance and species richness to be most strongly associated with insecticides in general, and for butterfly species richness the use of neonicotinoid-treated seeds in particular. This included the abundance of the migratory monarch (Danaus plexippus), whose decline is the focus...
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