Fall Nature

Fall Nature Fall nature is marked by shorter days, leaf color change due to pigments, and the onset of animal migration and hibernation.

Decreasing daylight hours, or photoperiodism, triggers leaf senescence. A corky layer of cells, the abscission layer, fo...
02/20/2026

Decreasing daylight hours, or photoperiodism, triggers leaf senescence. A corky layer of cells, the abscission layer, forms at the base of the leaf stem, eventually sealing off the leaf and causing it to detach from the branch.

Fall nature is visually defined by the cessation of chlorophyll production in deciduous trees. This reveals underlying y...
02/19/2026

Fall nature is visually defined by the cessation of chlorophyll production in deciduous trees. This reveals underlying yellow and orange pigments (carotenoids), while red and purple hues are created by newly synthesized anthocyanins.

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