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FLORA AND FAUNA
Plants frozen for centuries come back to life
by Staff Writers
Edmonton, Alberta (UPI) May 28, 2013


A moss (Aulacomnium turgidum), one of seven plants frozen under Teardrop Glacier roughly 400 years ago and induced to grow new stems and shoots in a lab. Image courtesy of Catherine La Farge.

Plants that haven't seen daylight since they were frozen more than 400 years ago during the "Little Ice Age" are sprouting new growth, Canadian scientists say.

The plant life has been coming back to life as glaciers in Canada's high arctic region have been retreating at an accelerated rate since 2004, researchers at the University of Alberta reported.

The retreating glaciers have exposed land -- and the frozen plant life -- that had not seen light of day since a widespread climatic cooling lasting roughly from 1550 to 1850, a period dubbed the Little Ice Age.

The "back-from-the-dead" capability of the plants, known as bryophytes, could provide insights into to how ecosystems recover from the planet's cyclic long periods of ice coverage, the researchers said.

The researchers said they were surprised by an emergence of the bryophytes buried under ice for so long.

"When we looked at them in detail and brought them to the lab, I could see some of the stems actually had new growth of green lateral branches, and that said to me that these guys are regenerating in the field, and that blew my mind," study lead author Catherine La Farge told BBC News.

The retreating ice is uncovering an array of life including cyanobacteria and green terrestrial algae, she said, and many of the species being revealed are entirely new to science.

"It's a whole world of what's coming out from underneath the glaciers that really needs to be studied," she said.

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FLORA AND FAUNA
Biological clock scientists share Asian prize
Hong Kong (AFP) May 28, 2013
Three scientists whose groundbreaking studies using fruit flies helped to uncover the workings of the human biological clock were Tuesday named the winners of the $1 million Shaw Prize. US scientists Jeffrey Hall, Michael Rosbash and Michael Young received the award "for their discovery of molecular mechanisms underlying circadian rhythms", the prize organisers said in a statement. Biolo ... read more


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