We have all been told NOT to stand under a tree
during a lightning storm. That is good advice since
we can move to a safer location. Unfortunately,
trees cannot move so easily and are often struck by
lightning bolts.
The damage done from
a lightning strike can be highly variable. Some
times a tree will die from extreme internal damage
done by the electrical current running down the
vascular system. In some cases, you would have to
look very carefully to tell if the tree had been
struck at all. Occasionally, the electricity will
streak down the
cambium layer and build up a
pressure that will make the bark explode in a
dramatic fashion. Dark scorches and fire may
accompany a lightning strike.
In the end, once the
tree has been damaged by lightning, there is little
you can do except remove any loose hanging plant
tissue. A
canker
may form in the damaged area and, if the damage was
extensive, the tree may be less stable.
In areas with a lot
of lightning, sometimes lightning rods and cables
are used to try to protect trees. If you consider
this alternative, always consult a professional
arborist first.
