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National Park - Forces of the Northern Range - Trembling Aspens
of sign - on the Forces of the Northern Range Trail between Tower
Junction and Mammoth Hot Springs
Yellowstone National Park.
taken June 2008
Roots of Survival
secret of an aspen grove lies hidden beneath the ground. Aspen's rarely grow
from seeds but spring up abundantly from the
of their parent. These young shoots are connected to each other
underground by an extensive root system and are
identical! This method of reproduction is called
are masters of cloning. Their clones can cover several acres and
sometimes live for thousands of years.
Why do Aspen's Tremble?
Quaking. Quivering. These words have all been used to describe Populus
tremuloides. Aspen leaves flutter in the
breeze because of how they are built. Their slender petioles - the
stems on each leaf - are flat and at a right angle to the
surface. Consequently, the leaves quiver as they catch the wind.
aspens tremble, light reflects from each shiny leaf, causing the entire grove
and deer browse on aspen bark, scarring the trunks.
exhibit made possible by a generous grant from the Yellowstone Association.
on the sign
addition to the text there are several pictures of aspen trees, aspen bark
and a three dimensional inset of aspen leaves and
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