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Most Poisonous Lake World Record
Anderson Lake, located in Port Townsend, Washington has the unpleasant distinction to be known as the most poisonous lake.

Since 2008, Anderson Lake has been plagued with soaring levels of anatoxin-a, a potent nerve toxin produced by blue-green algae. The safety threshold for the toxin, which can kill in four minutes after ingestion, is one microgram per liter; Anderson Lake readings were at 172,640 micrograms per liter.

Blue-green algae occurs naturally and is usually benign, but at times, certain types will begin pumping out toxins. Researchers at Oregon State University are securitizing types of blue-green algae that live in Anderson Lake to see if the cyanobacteria contains the same DNA as those commonly found in similar freshwater lakes.

 
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Ecology Shapes Evolution and Evolution can Shape Ecology - Some 300 to 500 years ago the damming of the Connecticut streams stranded some alewife herring in inland lakes which resulted in changes of the alewife and well as critters that feed on them such as water fleas.


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