High carbon dioxide levels spur Southern pines to grow mo...( and others weighed basketfuls of needl...)

High carbon dioxide levels spur Southern pines to grow more needles

and others weighed basketfuls of needles that had fallen into collection baskets at the FACE site, she said.

While those needles had already dropped from the trees, she could backtrack to the time the needles were produced "by making some assumptions about foliage longevity," she explained.

She and others also measured and counted growing needles and branches by ascending climbable towers at the FACE site.

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Contact: Monte Basgall
monte.basgall@duke.edu
919-681-8057
Duke University
11-Aug-2005

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