How do Trees Survive Winter?
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Fossil records tell us that about 250 million years ago, there wasn't a tree on Earth designedto survive in temperatures below freezing. They were all built for life in the tropics,where it's always warm, water is always liquid, and leaves are safe year-round without fearof frost.If you took a tropical tree (whether ancient or modern) and transported it to Siberia orPatagonia in winter, its water would freeze into sharp-edged ice crystals, fatally puncturingthe living cells in all of its leaves. The same thing that happens to lettuce and spinachwhen it freezes.Cold weather also means that water in the tree's plumbing system freezes, and dangerousbubbles form in the ice from air that was previously dissolved in the liquid water.The ice itself ...
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Fossil records tell us that about 250 million years ago, there wasn't a tree on Earth designedto survive in temperatures below freezing. They were all built for life in the tropics,where it's always warm, water is always liquid, and leaves are safe year-round without fearof frost.If you took a tropical tree (whether ancient or modern) and transported it to Siberia orPatagonia in winter, its water would freeze into sharp-edged ice crystals, fatally puncturingthe living cells in all of its leaves. The same thing that happens to lettuce and spinachwhen it freezes.Cold weather also means that water in the tree's plumbing system freezes, and dangerousbubbles form in the ice from air that was previously dissolved in the liquid water.The ice itself ...
