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Giant Balls of Bacteria Pile Up on Arctic Lake Beds
Arctic lakes are stark environments full of extremes. The creatures that live in them must endure blasting ultraviolet radiation for 24 hours a day in the summer, months of icy darkness in the winter, and low levels of life-sustaining nutrients. Still, some manage to survive and even flourish under those severe conditions: Take, for example, the sea tomato.

Sea tomatoes are round, plump colonies of toxin-producing cyanobacteria. Scientists reported last week that they have recently observed sea tomatoes stacking up on some Greenland lake bottoms like tomatoes piled haphazardly on a grocery display.



 
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Brazilian Elodea Introduced into Lake By Aquarium Dump - Brazilian elodea is a common aquarium plant that invaded Griffy Lake in the past. Officials can’t say for sure, but there was significant evidence that the Brazilian elodea was introduced after aquariums were dumped into the lake.


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