BIO-8 Lecture Notes - Lecture 14: Intraspecific Competition, Four-Dimensional Space, Interspecific Competition
Document Summary
As resources become scarcer, reproduction of competing individuals drop. Negative, negative ecological interaction (- / -) in which resource use reduces the reproduction of competitors. Resource use leaves less for self and others. Resource defense entails costs: types of competition. Intra=within: specific= species, so within species competition; within-species competition; competition with conspecifics, ex: song bird species competition for space. Interspecific competition: between species competition, ex: song sparrow and european starling competition for bird food. Resource competition (exploitative completion: simple usage leaves less for others, mere act of ingestion of unit resource levels less without any defense of the resource. Interference competition: resources are defended either physical or chemical, ex: allelopathy, ex: territories, ex: other aggressive defense behaviors to limit access by other individuals, resource defend entails cost, lotka-volterra model. Uses competition coefficients these express one species in units of other species (in terms of resource use) Alpha: species 2 expressed in units of species 1.
