Species Interactions in Ecosystems

• symbiosis refers to intimate or close association between two organisms of different species
• mutualism is a relationship where both organisms benefit
• commensalism is when one member benefits while the other is not affected
• parasitism is when one member benefits while the other is harmed
• ectoparasite are external parasites
• endoparasite is internal parasite
• predation is a relationship in which one organism attacks, kills, and feeds on the another
• competition is when two or more organisms compete for limited food, water, etc.
• interspecific competition is between different species
• intraspecific competition is between same species
• cooperation competition is behavioral adaptation exhibited by the members of a group