Mesocosms dosed with different concentrations of a neonicotinoid compound
Photo of a mesocosm like that utilized in the study. The rocks are colonized with natural stream communities of aquatic insects. Fresh stream water is circulated through the mesocosm, and individual mesocosms are dosed with different concentrations of a neonicotinoid compound.
From USGS study: Ecological consequences of neonicotinoid mixtures in streams