Biology 2483A Lecture Notes - Lecture 11: Intertidal Zone, Sessilia, Intraspecific Competition

• School: Western University
• Department: Biology
• Course: Biology 2483A
• Professor: Hugh Henry

Document Summary

Competition an interaction between individuals in which each is harmed by their shared use of a limiting resource. Competition occurs between species that share the use of a resource that limits the growth, survival or reproduction of each species. Interspecific competition: interaction between two species in which each is harmed when they both use the same limiting resource. Intraspecific competition: between individuals of a single species. Resources features of the environment required for growth, survival, or reproduction, and which can be consumed to the point of depletion. Examples of resources: food, light for plants, water in terrestrial habitats, space, especially for sessile organisms, for mobile animals, space for refuge, nesting, etc. Species are also influenced by physical factors (abiotic) that are not consumed, such as temperature, ph, salinity: these factors are not considered to be resources. Competition reduces availability of resources: experiments with two diatom species by. Competition can intensify when resources are scarce.