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Yellow-cedar are dying in Alaska: scientists now know why

February 29, 2012

Full Article at http://www.fs.fed.us/pnw/news/2012/02/yellow-cedar.shtml

Yellow-cedar, a culturally and economically valuable tree in southeastern Alaska and adjacent parts of British Columbia,  has been dying off across large expanses of these areas for the  past 100 years. But no one could say why—until now.

“The cause of tree death, called yellow-cedar decline, is now known to be a form of root freezing that occurs during cold weather in late winter and early spring, but only when snow is not present on the ground,” explains Pacific Northwest Research Station scientist Paul Hennon, co-lead of a synthesis paper recently      published in the February issue of the journal BioScience. “When present, snow protects the fine, shallow roots from extreme soil temperatures. The shallow rooting of yellow-cedar, early spring growth, and its unique vulnerability to freezing injury also contribute to this problem.”

Full Article at http://www.fs.fed.us/pnw/news/2012/02/yellow-cedar.shtml

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