BIO 2129 Lecture Notes - Lecture 14: Niche Differentiation, Diatom, Character Displacement
21 Oct 2016
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Document Summary
Identifies a really important concept in that the most affective competitor in a system is the one that can reduce resources t o lowest level ([]). (likely that other organisms will be driven out of system)- mechanism. R*- the threshold to which it brings resource availability down and to which the organism can tolerate the low threshold conditions. (space depicted on graph is resource space, not population size like the volterra) If resource availability to higher than r* for both species, they can co-exist. Over time as the resource runs out, the species with the lower r* value excludes the other. Second graph: resource 1 and 2 both drop to joint threshold (intersection) which also allows for coexisting. Theory of limitating similarity: selection will exert pressures through time- evolution. *tilmans models are more of a why things happen. Volaterra lacks mechanism, just shows that they happen. Diatom model graph: in chemostats with limiting resources.
