The Colorado Delta was one of the great deltas of the world. After decades of Colorado water being routed for human use, flows decreased, salinity increased and the ecosystem began to collapse. The river usually no longer reaches the sea. The clam Mulinia modesta was once the dominant species in the area, with 25-50 clams per square meter, but is now rare. Piles ("cheniers") of trillions of their shells can be seen today, a monument to a tremendous environmental crime. #clamFacts
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photo sources: https://www.geo.arizona.edu/ceam/Hecold/hecolcd.htm
https://news.cornell.edu/stories/2016/10/colorado-rivers-dead-clams-tell-tales-carbon-emission
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