Filtering phytoplankton from lake water
![Scientist in boat wearing gloves while filtering phytoplankton from lake water for analysis of mercury content.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/full_width/public/media/images/P6210236.jpeg?itok=j1d3h0J7)
Detailed Description
Phytoplankton is filtered from lake water for analysis of mercury content. Photo courtesy of U.S. National Park Service, Public Domain.
Sources/Usage
Public Domain.
Photo courtesy of U.S. National Park Service, Public Domain.