Ecological Ecological RelationshipsRelationships

Competition and PredationCompetition and Predation CompetitionCompetition – – occurs when occurs when

organisms of the same or different organisms of the same or different species attempt to use an ecological species attempt to use an ecological resource in the same place at the resource in the same place at the same timesame time

Predation – interaction in which one Predation – interaction in which one organism captures and feeds on organism captures and feeds on another organismanother organism

SymbiosisSymbiosis

SymbiosisSymbiosis – – relationship in which two relationship in which two species live closely togetherspecies live closely together

Symbiotic relationshipsSymbiotic relationships MutualismMutualism ParasitismParasitism CommensalismCommensalism

MutualismMutualism Symbiotic relationship in which both Symbiotic relationship in which both

species benefit from the relationshipspecies benefit from the relationship Example: The Red-billed Oxpecker Example: The Red-billed Oxpecker

eats ticks on the Buffalo's coateats ticks on the Buffalo's coat

ParasitismParasitism Symbiotic relationship in which one Symbiotic relationship in which one

organism lives in or on another organism lives in or on another organism (the host) and organism (the host) and consequently harms it.consequently harms it.

Example: Tick feeding off the blood Example: Tick feeding off the blood of a dogof a dog

CommensalismCommensalism Symbiotic relationship in which one Symbiotic relationship in which one

member of the association benefits member of the association benefits and the other is neither helped nor and the other is neither helped nor harmedharmed

Example: Barnacles on a whale and Example: Barnacles on a whale and clown fish living amongst sea clown fish living amongst sea anemonesanemones