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Winter is phasing into spring across much of the U.S., and that can make for big weather swings. How do plants handle the transition?
As Boston University biologist Richard Primack explains, trees and shrubs in cold-weather zones have evolved to handle shifts from cold to warm and back. Now, though, climate change is scrambling the signals faster than some species can adapt.
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Jennifer Weeks
Senior Environment + Energy Editor
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A late snowfall could set back the growth of this budding lilac.
oddharmonic/Flickr
Richard B. Primack, Boston University
Trees and shrubs in cold-weather climates rely on certain signals, such as temperature and light, to know when to leaf out and bloom. Climate change is scrambling those signals.
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