Plants are the most
important organisms in your biotic community. All of the other organisms
depend on them for food. Plants are also the most abundant organism
in your biotic community. For these reasons, most biotic communities
are named for the dominant plant that lives there. For example, a
is a biotic community. The pine is the dominant tree. A hardwood
hammock is a biotic community also. It is named after the hardwood
trees that dominate the community. What type of plant do you think
is dominant in a grassland?
Find out which species of tree in your biotic community is the most dominant.
The dominant tree species takes up the most area of the community. The
area is the amount of space that the trees take up. The space that
the trees take up is determined by how much living material the trees have
produced in their lifetime. In trees, most of this material becomes
what we call wood. It takes a lot
of wood to make a tree. The larger the tree, the more wood it has produced.
The wood and the rest of the tree's weight is called its biomass.
Why is biomass important? The more biomass the trees have, the more
energy they have used to produce it. In other words, the dominant
tree uses the most energy, the most raw materials, and produces the most
biomass of all of the organisms in the community. That's what determines
the dominant plant, and why biotic communities are named after them.