Impact of road salt on butterflies examined

The availability of the micronutrient could alter selection on foraging behavior for butterflies and other roadside developing invertebrates, research shows. Living things require micronutrients such as sodium and iron in sparing amounts, but they can play a big role in development. While a moderate rise in sodium can have some seeming benefits, too much of a good thing is toxic; for instance, the researchers saw markedly higher mortality rate in some subjects.

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