Trees are an irreplaceable component of the living
A tree is a living thing it has a woody stem, a
root system, and branches that are covered in seasonal leaves. It may have flowers and produce various
Trees can be broadly defined as perennial woody
plants that are least 13ft tall with a single trunk and a well developed crown of branches, twigs, flowers and
Environment Size and Competition.
A trees size and shape is determined by its genetic makeup, but
growth is also affected by environmental factors such as moisture, light and competition from other species. Trees
growing in crowded environments will only support compact crowns, due to the competition for light
Some species at high altitudes grow knotty and twisted as a
result of exposure to high winds.
Nature Oxygen, Food
Among the most beautiful and useful products of nature is the
tree. Trees have been cherished since ancient times. The oxygen we breathe is released by trees and other green plants, trees
prevent soil erosion and provide food and cover for animals all over the world.
They also supply almost countless products ranging from coal
and timber to paper and plastics.
Worldwide the number of tree species may exceed over 50,000, of
these about 690 are native to the United States and Canada.
Ecology and the mighty tree.
Trees are vitally important to animals as well as other plants.
Birds, mammals, insects and other wildlife use trees as nesting sites, for shelter
from the weather, for refuge from predators and as food both directly and indirectly.
Countless insects live on leaves and countless birds depend on
insects for sustenance.
While trees serve wildlife in various ways, many trees are
also dependant on wildlife for pollination and seed dispersal.
Identification of a
Trees assume a variety of shapes.
A young tree might not look entirely like a mature
tree of the same species, a natural forest grown tree, competing for sunlight with other trees and reaching
for the light, might be taller, slender and restricted in its branching compared to a home grown
or field grown tree where plenty of sun, soil and moisture have enabled it to develop a maximum
Identification of trees requires plenty of practice, field
guide manuals are available.