character displacement


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character displacement

[′kar·ik·tər dis′plās·mənt]
(ecology)
An outcome of competition in which two species living in the same area have evolved differences in morphology or other characteristics that lessen competition for food resources.
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Ecological character displacement in Plethodon: biomechanical differences found from a geometric morphometric study.
3) showed no evidence of reproductive character displacement, manifest as greater incompatibility in sympatry; in fact, the trend suggests the converse pattern.
Taper and Case (1992a, b) review the recent theoretical literature on character displacement and conclude that several approaches have debilitating assumptions, particularly revolving around biased predictions associated with asymmetric competition, and also an inability to accommodate intraspecific phenotypic variation.
Reproductive character displacement was once considered a rare phenomenon (e.
The third mechanism is reproductive character displacement (Brown and Wilson 1956) or reinforcement (Dobzhansky 1951), whereby a low fitness of hybrids indirectly favors further divergence in mate preferences.
That quirk achieved textbook status as the only documented example of the theory of convergent character displacement, explain Robert J.
While members of each of four Acacia species showed highly synchronized anther dehiscence, daily peaks of pollen release were regularly spaced across species, as predicted for generation of the observed patterning by competitive character displacement (Pleasants 1980, Waser 1983, Williams 1995).
This opens the way for frequency dependent selection, divergence, character displacement and competitive exclusion (MacArthur and Levins 1964).
The existence of Hutchinsonian ratios has only been weakly supported, but the regularity of size ratios, also referred to as morphological patterning, included under the umbrella of character displacement, has been controversial (Taper 1993).
First, we investigate how the use of different ancestral reconstruction methods affect our hypothesis that character displacement has occurred.
Reproductive character displacement in the Pseudacris nigrita complex.