A USGS scientist analyzes dragonfly larvae samples for mercury as part of the Dragonfly Mercury Project.
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A USGS scientist analyzes dragonfly larvae samples for mercury as part of the Dragonfly Mercury Project.
USGS scientist Tylor Rosera analyzes dragonfly larvae samples for mercury as part of the Dragonfly Mercury Project.
linkUSGS scientist Tylor Rosera analyzes dragonfly larvae samples for mercury as part of the Dragonfly Mercury Project.
USGS scientist Tylor Rosera analyzes dragonfly larvae samples for mercury as part of the Dragonfly Mercury Project.
linkUSGS scientist Tylor Rosera analyzes dragonfly larvae samples for mercury as part of the Dragonfly Mercury Project.
Mercury Research Laboratory team at the Forest Products Laboratory in Madison, Wisconsin
Mercury Research Laboratory team at the Forest Products Laboratory in Madison, Wisconsin
USGS scientist Mike Tate sets up the mass spectrometer for mercury isotope measurements.
USGS scientist Mike Tate sets up the mass spectrometer for mercury isotope measurements.
![Man at edge of lake crouched over collecting water sample](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/DPK%20sampling%20at%20Green%20Lake%20%282%29.jpg?itok=r5SaIdSX)
Scientist Emeritus Dave Krabbenhoft collecting water sample at edge of Green Lake, Minnesota (Kandiyohi County).
Scientist Emeritus Dave Krabbenhoft collecting water sample at edge of Green Lake, Minnesota (Kandiyohi County).
![Close up photo of zebra mussels washed up on shore of small inland lake in Minnesota](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/media/images/Closeup%20of%20Green%20Lake%20shoreline%20mess%20%281%29.jpg?itok=GqcnFDRh)
Close up of the Green Lake, Minnesota (Kandiyohi County) shoreline showing zebra mussels washed up on shore, October 2021
Close up of the Green Lake, Minnesota (Kandiyohi County) shoreline showing zebra mussels washed up on shore, October 2021