Learn
More About Giant
Sequoias...
and Their
Secrets of Success
It
has been said that in their character and in their rarity, no other
living thing compares with a Giant Sequoia.
Below you will find some fascinating and revealing truths
about these incredible trees. v
The
most massive living thing on our planet, the Giant Sequoia has the
largest number of cells interconnected in a single, discrete whole.
No other form of life even approaches the massive bulk of the largest
of these giants. v
The
Giant Sequoia named The
General Sherman Tree reigns
supreme as the largest of the living things on Earth.
It's annual growth rate yields a yearly average of new wood equal
to a tree one foot wide and 50 feet tall!
Some branches of this tree are by themselves larger than the typical
trees east of the v
Giant
Sequoias are also one of the most enduring living things on the
planet with many living over 2,000 years and some living past 3,000
years, or 40 human lifetimes.
v
The
world’s largest trees are also the world’s fastest growing trees.
To fully comprehend how large it stands, it is equivalent to
a 30 story building in height and a 3 story building in width (trunk
only). v
Giant
Sequoias can survive in less than 3 feet (1 meter) of soil by spreading
their roots far from the tree, up to 300 feet (100 meters).
That such mammoth trees have such shallow root depth is astonishing.
v
How
do such trees remain upright without a deep anchoring system?
Giant Sequoias are extremely well-balanced and can notoriously
maintain their equilibrium regardless of difficult conditions.
The complex intertwining of
roots helps support these huge trees. v
Sequoias
help each other. Giant
Sequoias do not compete with each other for resources, rather their
huge root systems fuse together and they share resources.
v
Giant
Sequoias triumph over the natural challenges that often kill other
forest trees. For
example, Giant Sequoias are drought resistant, disease resistant,
insect resistant and fire resistant.
v
Giant
Sequoias are sun worshippers, yet annually each tree must absorb
vast amounts of water. When
a Giant Sequoia falls in the forest, witnesses say that a river of
ice water pours out. v
The
cinnamon-colored bark of a Giant Sequoia contains one of its
greatest secrets to success.
The cinnamon color comes from “tannic acid” which is
found in the bark and the wood of a Sequoia, and this is why
Sequoias are often called “Redwoods”.
Although many trees contain some tannin, the high content in
Sequoias is largely responsible for the tree’s resistance to
disease, insect infestation and fire.
v
Sequoias
are thick-skinned. The
bark of the Giant Sequoia is generally thicker than that of any
other species of the tree on earth, and this heavy bark is a major
factor contributing to the tree’s longevity.
Sections of the bark will exceed two feet in thickness.
v
Giant
Sequoias, like most other trees, grow as long as they live.
Although upward growth usually is completed within the first
800 years of life, Sequoias continue to grow thicker throughout
their long lives. v
Sequoias
are extremely fruitful. The
average mature Giant Sequoia produces approximately 2,000 cones
each year. Since there
is an average of 200 seeds per cone, 400,000 seeds could be released
from each tree each year. With
an average of three mature trees per acre, over
a million seeds are produced per acre per year in most Sequoia
groves. v
Giant
Sequoias can provide food for themselves (and others).
The constant rain of bark, twigs, cones, and their subsequent
decomposition by soil organisms maintains a dynamic
balance by constantly returning nutrients to the soil. v
Believe
it or not, Giant Sequoias are dependent on fire for survival. Studies
revealed that fire could be used as a management tool, at least in
small areas, and that it would not only reduce fire hazard, but
would stimulate the regeneration of Giant Sequoias in many ways.
Scientists confirmed that Giant Sequoia reproduction
effectively dropped to zero in groves where fires were not allowed
to burn. v
Not
only is the Giant Sequoia adapted to live with fire, it gains
benefit from the association. For
example, rapid growth occurs after a fire.
Rising heat from a fire dries out the hanging Sequoia cones
which open up, allowing seeds to rain by the millions.
These seeds land on cleared soil fertilized by ash.
On soil left bare by fire, they can take root.
Giant Sequoia seed germination naturally occurs best in
fire-burned, mineral-rich soils.
v
Sequoia
seedlings are much more likely to survive where fire burned hottest.
Clusters of Giant Sequoias may be found where fire once
burned very hot, called a Hot Spot.
Because the shade canopy is destroyed, those remaining plants
that can tolerate high light intensities will be favored.
The Giant Sequoia is such a plant. v
Giant
Sequoias are Fire-Resistant, but not Fireproof.
The thicker bark will not hold a flame, but the bark can
be seared through when accumulations of fuel beneath the tree burn
for a long time. The deep and long fire scars that can be seen on
many Giant Sequoia trunks are probably due to the heat of the
burning, less fire-resistant adjacent trees.
v
Sequoias
Heal. Giant Sequoias
have an amazing ability to heal when injured.
Often despite severe fire damage
(some burned completely hollow) Giant Sequoias can survive for
centuries. Continually new
wood grows from either side of a fire scar, covering a little more each
year until the injury is healed over like new skin on a body.
Cross-sections of logged Sequoias disclose many cases where fire
scars have completely healed after the damage was incurred.
v
Sequoias
naturally form partnerships.
Like most living organisms, the Giant Sequoia does not
live alone; it is but one member of a complex association of plants
and animals whose continued existence depends on interdependence of
physical and living components.
For example, the Giant Sequoia lacks the ability to drop its
own cones; a mature Sequoia tree carries thousands of cones.
These cones hang on a tree with its seeds sealed up for up to
20 years until something opens them.
Two very small forest residents act as seed dispersing agents
for the Giant Sequoia: the
tiny, Long-horned Wood-boring Beetle and the Chickaree or Douglas
Squirrel. v
Sequoias
are interdependent and their well-being depends on reciprocal arrangement
of services. Both the
beetle and the Chickaree for example receive nourishment from the Giant
Sequoia cones, and in exchange they assist the seeds to be released, greatly
increasing the chances of Giant Sequoia reproduction.
What is also interesting to learn is that the Chickarees seem to
prefer cones between two and five years old, while the beetle apparently
prefers cones four years or older. v
Giant
Sequoias can live a long time, but they are not immortal.
Soft soils, heavy snows and root damage can unbalance a tree
and cause it to eventually fall.
v
Giant
Sequoias provide for future generations.
After the death of a Giant Sequoia the tannin acts as a
natural preservative which slows the decay process tremendously
resulting in a slow-release of nutrients for literally thousands of
years. In one case, scientists found a Giant Sequoia lying buried
under sediment, undecayed for almost 10,000 years!
You
can find Giant Sequoias growing all over the world, yet today
they are only native and reproducing in the Sierra Nevada Mountains
of California where dozens of natural Sequoia groves proudly stand.
With
the Giant Sequoia’s discovery, it was to be expected that people
would want to grow these trees.
Today there is scarcely a hilltop in |