BISC302 Lecture Notes - Lecture 16: Ecological Niche, Niche Differentiation, Typha
8 Nov 2016
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Document Summary
A species of cattail is forced into deeper water when a competitor species is introduced. A stable environment with resources available year round slides. Realized niche, smaller than fundamental niche, what you end up doing. Can change with life history (stage of life) Many studies on competition have involved introduced species. Restriction of niche in response to niche overlap in competing species. May be a result of character displacement, resource partitioning, etc. Niche expansion following the removal of a competitor or colonization of a new area. Narrow niche, use a specific range of resources. Thus predation often results in increased diversity - Nh = prey population, np = predator population r = reproduction, c = capture efficiency (rate of predation) Population depends on births - deaths dn/dt = births - deaths dnp/dt = fcnhnp - dpnp f = conversion of prey into predator offspring, d = predator deaths.
