Related Definitions

Commensalism: A symbiotic relationship in which one organism benefits from the relationship, while the other is not significantly helped or harmed.

Competition: Groups or individuals within a species contend for available food or territory, with those from another species.

Endosymbiosis: A symbiotic relationship in which one symbiont lives within the tissues of the other.

Facultative Mutualism: Symbionts which do not rely on each other for their existence, but chose to interact as a matter of the benefit gained (for at least one member of the pair).

Host: Most often associated with the victim of a parasitic relationship, it can also refer to any mutualistic or commensal symbiont which provides something of value.

Obligate Mutualism: Both symbionts depend entirely upon each other for their survival.

Mutulistism: A symbiotic relationship in which both symbionts gain benefit from the interaction.

Parasitism: A symbiotic relationship in which only one member of the association benefits, whereas the other is harmed.

Predation: The predator/prey relationship entails the consumption of individuals from one species by those of another.

Phoresis: The transportation of a member of one species to another location by a different organism. This may have mutualistic results or it could be commensal.

Symbiont: Member of a symbiotic relationship

Symbiosis: The physical interaction of two different species of  biological organisms.