ENVS200 Chapter Notes - Chapter Chapter 6: Interspecific Competition, Ecological Niche, Competitive Exclusion Principle
10 Feb 2018
School
Department
Course
Professor
Document Summary
Interspecific competition: competition between individuals of different species. Individuals of one species suffer a reduction in fecundity, survivorship, or growth as a result of either exploitation of resources or interference by individuals from another species. When any of the species was grown alone, it established a steady population density, reducing the phosphorus to a constant low concentration. When any two species were grown together, there was only one survivor whichever species had previously reduced phosphorus to the lower level. Dolly varden charr and white-spotted char (species of salmonid fish: dolly varden are distributed further upstream than the white-spotted charr, water temperature increases downstream. Varden being less aggressive when white-spotted charr were present. Competing species often coexist at one spatial scale but are found to have distinct distributions at a finer scale of resolution. Species are often excluded by interspecific competition from locations at which they could coexist perfectly well in the absence of interspecific competition.
