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Filtering phytoplankton from lake water

By Alaska Science Center
Scientist in boat wearing gloves while filtering phytoplankton from lake water for analysis of mercury content.
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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.