BIOL 150 Lecture Notes - Lecture 6: Intraspecific Competition, Interspecific Competition, Ecological Niche
Document Summary
Community all the species that interact in a certain area. Four types: commensalism, consumption (includes parasitism, mutualism, competition. Symbiosis any close and prolonged physical relationship between individuals of two different species. Thus: species interactions can act as agents of natural selection. Co-evolutionary arms race: a repeating cycle of reciprocal adaptation. Niche - the range of resources that the species is able to use. Interspecific competition occurs between individuals of different species competing for the same limited resource. Amount of niche overlap determines how asymmetric the competition is . Competitive exclusion principle two species that occupy the same niche cannot co-exist. Fundamental niche their term for potential niche . Realized niche the portion of the fundamental niche that a species actually occupies. Natural selection that leads to an evolutionary change in traits to reduce amount of niche overlap (& competition) Intra-specific competition: competition between individuals of same species competing for same limited resources.
