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Chemical quality of rivers revealed by small freshwater shrimp

Harlequinmania

By Harlequinmania,
in General Reefkeeping_

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Harlequinmania

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Biological markers detect the presence of toxic substances in the environment. In implementing the European water framework directive, scientists use Gammarus, a small freshwater shrimp present in all rivers, as a marker. They observe the impact of contamination on the main vital functions of the animal, which thus serves as a sentinel for rivers.

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1000 Gallon Tank in the Hole 

http://www.sgreefclub.com/forum/topic/120957-1000-gallon-3d-hole-in-the-wall/ 

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