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Unformatted text preview: Niche theory distinguishes between fundamental & realized niches: fundamental = all possible conditions under which population reproduces itself realized niche = the actual niche exhibited in particular time & place Realized niche will almost always be a subset of ("smaller than") the fundamental niche, for various reasons; one important determinant of realized niche is presence or absence of different competitors Recall the definition of ecological competition ( competition lecture ): presence of N 1 has negative effect on growth rate of N 2 because both populations utilize > 1 of same limited (relative to demand) resources Obviously, the more limited resources two populations have in common (i.e., the more similar their niches are), the greater the impact of competition (all else being equal) Consider an extreme case: Can 2 populations occupying the same resource niche coexist in the same environment?...
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This note was uploaded on 11/22/2011 for the course ANT ANT2000 taught by Professor Monicaoyola during the Fall '10 term at Broward College.
- Fall '10