BIOB50H3 Lecture Notes - Lecture 7: Flea Beetle, Interspecific Competition, Intraspecific Competition
2 Aug 2016
School
Department
Course
Professor
Document Summary
An antagonistic interaction (- / -) in which both parties are harmed by their shared use of a limiting resource, reducing their ability to survive, grow, or reproduce. Intraspecific competition: competition between individuals of the same species. Interspecific competition: competition between members of different species. The more limiting the resource, the more intensive the competition. Gause"s principle of competitive exclusion: two species that use a limiting resource in the same way cannot coexist indefinitely; one species will outcompete (exclude) the other, driving it to extinction. Species impact each other by depleting a shared resource. Scramble competition, they can coexist since they use this resource differently, some on day, some on night e. g. mice are a shared prey resource for coyotes, foxes, and owls. Species directly interact and fight over a shared resource. Outcomes of competition: competitive exclusion local extinction, occupying a realized niche. Occupy a small part of your resource niche: stable coexistence via intraspecific competition.
