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Content Tagged "permafrost"

Maturing Metagenomics Needs Ground Rules

For every known star in our universe, there are billions of microbes here on Earth. But scientists are unable to culture most of these species in the lab. One approach to getting to know these beguiling bugs is to look at the big picture of their community. Metagenomics aims to characterize the overall genomic profile… [Read More]

Microbes as the unknown variable in thawing permafrost

Permafrost covers a quarter of the Earth’s land surface and stores significant amounts of carbon. As global temperatures rise and cause the frozen soils to thaw, so have concerns on the fate of the stored carbon and on the global climate. One of the recent studies that looked at this question was conducted by researchers… [Read More]

Permafrost study referenced in ScienceNews

In Nature in December, a team of researchers at the Department of Energy’s Joint Genome Institute in Walnut Creek, Calif., and colleagues reported one such microbe’s draft genome — put together from DNA acquired from the semifrozen dirt in an Alaskan black spruce forest. The Alaskan microbe carries genes tuned to transform organic matter into methane, a finding that… [Read More]

Permafrost metagenome study on VOA Special English report

The researchers say one gram of the soil could contain thousands of different kinds of microbes and billions of cells. They say these organisms had never before been cultured in a laboratory. JANET JANSSON:  “So more than ninety percent of those bacteria and other microorganisms in permafrost, we had no idea what they were.” Read… [Read More]

Microbial response to the thawing Arctic

The frozen Arctic soils keep an estimated 1,672 billion metric tons of carbon out of the Earth’s atmosphere, more than 250 times the amount of greenhouse gas emissions attributed to the United States in the year 2009. Rising global temperatures have led to increasing concerns on the potential impacts of thawing permafrost upon the carbon… [Read More]

Permafrost soil metagenome study on Voice of America

Lead author Janet Jansson, senior scientist at the Lawrence Berkeley National Laboratory in California says the trapped microorganisms in permafrost are still active. Jansson and colleagues at the U.S. Geological Survey and the Joint Genome Institute at the Department of Energy set out to identify microbes in permafrost and find out what they would do once… [Read More]

Permafrost soil metagenome study on Medill News Reports

Microbes frozen for thousands of years can spring to life and digest the carbon to release heat-trapping gases into the atmosphere, amplifying warming and melting. Scientists can’t yet predict how much of the carbon stored in Arctic permafrost will reach the atmosphere, but microbes could play a pivotal role. Read more on Medill Reports Chicago [Read More]

Permafrost soil metagenome study on Examiner.com

The carbon dioxide contained in the polar caps is estimated to be 1,672 billion metric tons. The slow but steady melting of the polar regions from global warming has and will continue to release more carbon as carbon dioxide as the ice sheets melt.More interesting and more potentially dangerous is the effect that melting ice… [Read More]

Permafrost soil metagenome study in Gizmodo

A team of researchers from Berkeley took chunks of permafrost soil from Alaska, and shipped them back to the lab to thaw them out in controlled conditions. As they woke up, the gassy little microorganisms trapped in the melting ice spewed out more methane than the contestants in a bean-eating competition. Read more in Gizmodo [Read More]

Permafrost soil metagenome study in Alaska Dispatch

Researchers have carted chunks of Alaska permafrost off to California, where have learned that allowing the once frozen soil to thaw wakes up hungry microbes, according to newscientist.com, which also offered a cautionary tale. Read more in the Alaska Dispatch [Read More]