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Horizon Discovery
Horizon Discovery

Microbial Life Beneath the Ice

Researchers uncover a diverse microbial community living beneath 27 meters of ice in Antarctica’s Lake Vida.

By | November 27, 2012

Lake Vida field camp, erected for about a month in 2010 in the Victoria Valley, AntarcticaCourtesy of Emanuele Kuhn, Desert Research Institute, Reno, NevadaThe super salty waters of Lake Vida in Antarctica have been isolated from the surface by a thick layer of ice for nearly 3,000 years, but that doesn’t mean they don’t harbor a diverse array of microbial life. Drilling through the ice and taking samples of the water below, microbial environmentalist Alison Murray of the Desert Research Institute in Reno, Nevada, and her colleagues found troves of metabolically active microbes in the oxygen-free, very salty water, or brine.

“Lake Vida is not a nice place to make a living in,” coauthor Peter Doran of the University of Illinois at Chicago told Nature. “It is quite remarkable that something wants to live in that cold, dark, and salty environment at all.”

The findings, published yesterday (November 26) in the Proceedings of the National Academy of Sciences, push the boundaries of the extreme conditions that can support life on Earth, the authors said. Having been isolated from external carbon sources for thousands of years, the microbes appear to have found new ways to generate energy, including interacting with the underlying sediment to produce molecular hydrogen, which is known to support certain bacterial life in deep gold mines.

“For sure, there is a lot of energy in the brine,” Murray told Nature. “Carbon may be the primary energy source, but hydrogen may be vital to sustain the lake’s microbial life in the long-term.”

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Avatar of: kitapbigi

kitapbigi

Posts: 20

February 11, 2013

 

To Dave20640, 65% is the proportion of the 2,000 retracted articles, not of all articles published. If 200,000 articles were published, that would be only 2/3 of one percent of all articles published; not a stunning number. I didn't see anything in the article (or the linked material) that indicated whether 2,000 was large or not, by comparison. What perplexes me is that these people think they are not going to get caught. That makes me wonder if there's a lot more going on than we know about, that they do know about. I then wonder why we don't see, in these reports, information that they were asked if, in their experience, this kind of behavior is widespread. Not that we would necessarily be confident about the veracity of their observations. kredi hesaplama-evim şahane - fragman izle - mobilya modelleri

 

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