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Collecting dragonfly larvae for the Dragonfly Mercury Project

September 2018 (approx.)

Detailed Description

Between 2009 and 2018, scientists conducted a national scale assessment of mercury accumulation in the National Park System using dragonfly larvae as biosentinels (species that accumulate a pollutant in their tissues as an index of exposure to other organisms without significant adverse effects to the biosentinel) through a citizen science network called the Dragonfly Mercury Project.


Public Domain.