Winter road salting reshapes next summer’s butterflies
Anti-ice treatments can have sex-specific effects
By Susan Milius, 13:37 PM June 10, 2014
Salting roads in winter can tweak the physiques of butterflies the next summer.
Milkweeds and oaks, plants that caterpillars graze on, collected from alongside a country road carried higher sodium concentrations than the same species growing at least 100 meters from the splash and drift of deicing salt, says Emilie Snell-Rood of the University of Minnesota in St. Paul.
Monarch (Danaus plexippus) caterpillars raised on the sodium-boosted plants turned into males with extra thoracic muscles and f...
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