Winter and tree survival:
It is amazing how trees withstand the harsh winter and freezing temperature. Most animals migrate to warmer temperature for them to survive but trees do not migrate but rather device ways to survive the freezing temperature. This brings us to the questions -
a) How do winter trees survive?
Trees have bark that varies in color, density and texture which protect them from extreme cold temperature. The tree bark is similar to our skin that act as protection against cold temperature by conserving heat.
Trees retain moisture for survival by dropping their leaves to reduce transpiration particularly, trees that have broad leaves (deciduous trees) while those that have narrow leaves (conifers) retain their leaves.
b) Can trees freeze to death during winter?
Sometimes trees may not be able to tolerate the freezing temperature, they will burst open and explode. That is right! I know this is an eye opener for many people. The tree sap can be frozen at extreme cold temperature beyond the tree tolerant. As the tree sap freezes, it expands thereby adding pressure on the bark of the tree which results to explosion.
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