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  1. Why Leaves Fall from Trees in Autumn

    • As winter descends, trees in temperate and boreal zones face punishingly cold temperatures and frigid winds, conditions that would damage leaves, so trees have to reduce themselves to their toughest part… See more

    How Pigments Play A Part

    It’s all about chlorophyll—the green pigment that allows plants to absorb sunlight and turn it into food that can be stored for winter dormancy, much as a bear stores fat fo… See more

    The National Wildlife Federation Blog
    Best Weather For Colorful Falls

    The most-dazzling displays of scarlet and crimson occur in autumns marked by warm, bright days and cool, crisp nights with temperatures above freezing. Sun-lit autumn da… See more

    The National Wildlife Federation Blog
    Losing Leaves

    Eventually, autumn leaves must fall. By the end of summer, they may be damaged by insects, disease or general wear and tear and ready for renewal. They are equipped to self-destr… See more

    The National Wildlife Federation Blog
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  2. It turns out autumnal leaf drop is a form of self-protection. While evergreen plants in cold climates have thick waxes and resins to protect their leaves from freezing and fracturing, deciduous species generally have thin leaves that are susceptible to cold temperatures.
    www.britannica.com/story/why-do-leaves-fall-in-autumn
    www.britannica.com/story/why-do-leaves-fall-in-autumn
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  3. Why Do Leaves Fall in Autumn? | Britannica

    In temperate regions of the world, autumn is marked by the brightly colored foliage that slowly drops from trees and shrubs to carpet the ground. But why do some plants shed their leaves before winter? It turns out autumnal leaf drop is …

     
  4. Why Do Leaves Fall in Autumn? | Weather.com - The …

    Apr 2, 2019 · One of the most common visuals of fall is the sight of red, orange and yellow leaves falling from trees and coloring the ground. However, why this happens is not as well known.

  5. Why Trees Lose Their Leaves in the Fall - Scientific …

    Mar 30, 2024 · This article takes a look into why trees lose their leaves in the fall, examining the biological and environmental mechanisms that drive this process. From water conservation and energy efficiency to the hormonal changes that …

  6. Why Leaves Really Fall Off Trees : Krulwich …

    Oct 30, 2009 · It's because trees use "scissors" to cut their leaves off. We call this season the "fall" because all around us right now (if you live near leaf-dropping trees in a temporal zone), leaves...

  7. The chemistry behind leaves changing colour and …

    This is why they provide the last colour we see before the leaves fall from trees. Trees lose their leaves to conserve energy during winter. As we head towards the colder months, at the base of each leaf stalk – where it attaches to the branch …

  8. The Science Behind Fall Foliage - American Forests

    Oct 2, 2017 · It’s officially been fall for a little more than a week, and for anyone who lives near a deciduous tree — one that sheds its leaves in the fall — this means some beautiful sights are about to occur. But why do trees go through …

  9. Why Leaves Fall in the Fall - Science | AAAS

    Feb 20, 2009 · Leaf cells might undergo an annual chain of events that kills them, causing leaves to drop from trees every autumn. Jupiter Images. The annual spectacle of leaves turning color and falling to the ground has long inspired …

  10. The science behind fall foliage | UNC-Chapel Hill

    What benefit do trees derive from their leaves changing and falling? It gets colder with shorter day lengths during winter, and rather than expend any energy to maintain their leaves, trees shed them and go dormant.

  11. Why do leaves fall off trees? - BBC Bitesize

    Simply, trees actively shed their leaves because there’s no use for them anymore. Doing this also ensures the tree’s long-term survival. If it didn’t do it every year, the water in the cells of...

  12. How do trees change in the fall? - U.S. National Park …

    Sep 25, 2019 · Broadleaf trees are responsible for the colorful annual display that defines autumn. For most of the year, a bright green chemical called chlorophyll supports photosynthesis in leaves. When the days grow shorter, chlorophyll …

  13. The Colors of Fall Leaves Are Shaped by Climate Change and …

  14. Science of Fall Colors - US Forest Service

  15. Which factors trigger leaf die-off in autumn? - ScienceDaily

  16. Why do leaves change color in the fall? - Smithsonian Institution

  17. The Science Behind Falling Leaves - Premier Tree Solutions

  18. How do leaves change color and why do they fall? The science of …

  19. Autumn Leaves Falling/Blowing From Trees on a Windy Fall Day

  20. See 24 Beautiful Photos of Fall Foliage in Its Most Vibrant Colors

  21. When Do Leaves Change Color This Year? - Better Homes

  22. 'Bomb cyclone' leaves 2 women dead as falling trees wreak …