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These unusual trees are
unique for their great age and their ability to survive adverse growing
conditions. In
fact,
it seems one secret to their longevity is
the harsh environment in which most bristlecone pines grow.
One bristlecone pine near Wheeler Peak was dated to be more than 4,900 years
old. Conditions are harsh, with cold temperatures, a short growing
season, and high winds. Bristlecone pines in these high-elevation environments
grow very slowly, and in some years don't even add a ring of growth.
This slow growth makes their wood very dense and resistant to insects,
fungi, rot, and erosion. Vegetation is very sparse, limiting the role
of fire. Bristlecone pine seeds are occasionally cached by birds at
lower elevations. Bristlecone pines grow more rapidly in more "favorable" environments
at lower elevations. |
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