an interaction between organisms within a community in which all species are negatively affected. Competition occurs when organisms attempt to use the same limited resource.
competition in which organisms directly fight with one another over resources
competition in which organisms don't fight, but simply exploit the same resource. If the resource is limited, none of the organisms may obtain enough of it.
a common outcome of competition. It occurs when one species is a better competitor than another. The stronger competitor will eventually drive the weaker one out of the community. If there is no suitable habitat for the weaker species elsewhere, it will become extinct.
the loss of a species from a particular area, often caused by competitive exclusion. Extinction may be local (and thus, potentially reversible), or planet-wide (and thus, permanent).
A method that many social organisms to reduce competition for food (and sometimes mates). Every individual has a rank within its society, and this indicates when every individual is entitled to eat from shared food sources. Ranks are determined among animals in many ways, including size, age, gender, personality, and often relatedness to other individuals of particular ranks.
the number of different species in an area
an organism that has a strong influence over community structure. If that species disappears, the structure of the community will change drastically. Predators are often keystone species.