Scientists in the Antarctic glacial lakes found in samples of new species

The researchers said Hodgson Antarctic lake sediments microbiological analysis discovered the first scientific field unknown bacterial species.



Hodgson from the air overlooking the lake, which is located in the middle of the U-shaped rock.

Frozen up almost 10 years of Hodgson Lake basin soil samples contained in a large number of bacteria organisms, including some extreme microbes. British Antarctic Survey and the University of Northumberland researchers wrote in a paper: “microbiological analysis showed that the presence in the sample rich biodiversity.” Antarctic lakes investigations have brought a surprising biodiversity, and according to reports, the famous lake of Lake Vostok sample contains 3,507 kinds of organisms DNA.

Hodgson Lake is a 2 km long, 1.5 km wide freshwater lake, is located in Alexandria Island Citadel Bastion Hill neighborhood. Hodgson was the same lake as Lake Vostok is a glacial lake, but now only at about 4 meters thick ice under. Although ice thickness of only 4 meters, but the ice before it reaches 500 m thick, and at about 1.35 million years ago began thinning.

By identifying the magnetic field present in the sample reversal events as well as other analytical techniques, researchers were able to confirm that the lake bottom sediments formed about 9.3 million years ago, plus or minus 9,000 years. In Hodgson Lake samples, the lake itself is not life to survive. But researchers at about 100 meters deep lake sediments revealed rich biodiversity. They discovered a series in the sample of bacteria, actinomycetes and mainly Proteobacteria, and only about 77% of the DNA sequence to match the known species.

Antarctic lakes are sometimes found in those environments speculation and environment similar to Europa, scientists inferred Fengyun icy satellites of Jupiter may be out there. In addition, this study also allows us to understand the lives of thousands of years ago survived the type, and their lives completely isolated from other cases how to breed. Authors David Pearce said: “These organisms survive in such a unique environment of the facts, it may mean that they form a unique mode of reproduction, which could bring us an exciting discovery.”

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