Is a hollow tree dangerous

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Hollow trees don't have to die

The bark protects a tree from injury so that the wood inside stays hard and firm. This protective jacket can be damaged - by lightning strikes, by people who cut something, or even by animals.

Insects poke small holes in the bark and lay their eggs there. Wood drill caterpillars eat tunnels in the wood, woodpeckers punch holes in the bark to get larvae out. Fungus species can penetrate the bark through such holes, settle there and destroy the wood.

Several types of bacteria also feed on wood. This way, the holes in the tree can get bigger and bigger - and one day the trunk will be hollow. But that doesn't mean he has to be dead. Many hollow trees still have green leaves. How come

The core of a tree trunk only functions as a scaffold. The layer that lies directly behind the protective bark is important for life. Elongated thin tubes extend there - the "tracheids" - which conduct water and nutrient salts from the soil into the leaves. Other tubes supply the trunk with vital material that forms in the leaves. As long as the tubes under the bark are undamaged, all parts of the tree can be supplied. But a porcupine can kill a large, sturdy tree. Porcupines have a habit of eating a thin strip of bark around the trunk. Such a ringed tree soon dies because its food supply is interrupted.

Now you also know why some Christmas trees quickly lose their needles, even when they are in a stand filled with water. When fitting into the stand, the tree is usually pointed. The bark is removed - and the tree can no longer absorb any water.

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