BIOL 150 Lecture Notes - Lecture 1: Niche Differentiation, Ecolo, Herbivore
Document Summary
Short term: affect population abundance and distribution. Species interactions: competition: (-/-) occurs when individuals use the same limited resource. Tness of both: can be intra- (within species; especially if high density) or interspeci c (between species, often discussed in terms of the niche range of resources a species can use. Interspeci c competition niche overlap between two species: consumption: (+/-) occurs when one organism eats or absorbs nutrients from another. Increases the consumer"s tness, but decreases victim"s tness: mutualism / facilitation: (+/+) occurs when two species interact in a way that is mutually bene cial. Bio 150 exam 2: commensalism: (+/0) occurs when one species bene ts but the other species is unaffected. Competition (-/-) for resources: can be intra- (within species; especially if high density) or interspeci c (between species, often discussed in terms of the niche range of resources a species can use.
