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#1906: Pollen season arrives: blame the trees

photo: The bark of a birch tree that is now releasing millions of grains of pollen. Photo by Ned Rozell. With your next breath of spring air, you'll pull dozens of invaders through your nose. These intruders may make your nose drip and your eyes red and watery.

The airborne invaders are grains of tree pollen, specks so small that it would take eight of them to cover the period at the end of this sentence. The air is rich with pollen because spring is the mating season for trees.

The first step in a tree's reproductive dance is to release sperm, safely held in the center of a pollen grain. Trees release an incredible amount of pollen…(more)


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Recent Articles

Pollen season arrives: blame the trees; Ned Rozell. #1906; 5/07/08

The singing sparrows of Shishmaref; Ned Rozell. #1905; 4/30/08

Twenty years of the Alaska Volcano Observatory; Ned Rozell. #1904; 4/23/08

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Green, leafy invaders finding a home in Alaska; Ned Rozell. #1898; 3/12/08

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