A community can be defined as an environment where a group of organisms live in close
enough proximity to provide the potential for interaction between them (Campbell & Reece,
The interactions these individuals share can range from mutualism, where both parties
benefit, to neutralism, where neither organism is affected by the other.
Competition, the most
common interaction, occurs when these individuals struggle to obtain for such resources as light,
space, water, and nutrients (Dept. EEB, 2008).
Competition takes place largely when the
specific resource is limited and therefore is not found in sufficient amounts to support all the
individuals that need it.
There are two primary forms of competition (Wilson & Bossert, 1971).
Intraspecific competition occurs when individuals of the same species are competing.
be seen when more than one of the same organism is present in a community, and because they
both need the same resources, they prevent each other from reaching full potential, whether it be
developmental or reproductive.
Interspecific competition, on the other hand, occurs among
individuals of different species.
We generally see this when resources are in a limited supply and
therefore cannot fully support the volume of individuals that require them.
Because plants all require solar energy, root space, and nutrients from their soil, they will
be competing for them (Dice, 1952).
This plant competition generally results in reduced yield of
seeds or underdevelopment of either one or both of the competing plants.
If competition is
strong enough, it can lead to the elimination of one or more of the competing species from the
In this experiment we will assess the effects of competition between
species of wheat, and
, a species of mustard, on the growth of each of these
These two species are fitted for this experiment because of their complementary