Chapter 17

Chapter 17 - models for palatable ones to disguise...

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Chapter 17- Evolution of Species Interactions Adaptations o Biological factors stimulate mutual evolutionary responses in the traits of interacting populations o Biological agents foster diversity of adaptations, rather than promoting similarity Organisms tend to specialize o Coevolution- populations of two or more species interact, each may evolve in response to those characteristics of the other that affect individual fitness Evolved responses are reciprocal Herbivore evolves a away to detoxify a noxious chemical that has evolved in a plant to protect it against that same herbivore o Crypsis vs. warning color Crypsis- blending in with their environment aka camouflage Warning coloration/aposematism- producing noxious chemicals or accumulating them from food plants and advertising the fact with conspicuous color patterns o Mimicry Batesian mimicry- unpalatable animals and plants that serve as
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Unformatted text preview: models for palatable ones to disguise themselves to predators to make them think they’re not consumable Mullerian mimicry- when several unpalatable species adopt a single pattern of warning coloration • Most bumblebees and wasps have black and yellow stripes so predators know o Genotype-genotype interactions Differences in the expression and fitness of genotypes in one species depending on the genotypes of another species • Responses to selection o Character displacement Sympatric- where two species coexist within the same geographic area Allopatric- where geographic ranges do not overlap Character displacement- sympatric populations of species will differ more from each other than allopatric populations of species • Galapagos island finches o Preadaptations- traits that become useful for a purpose other than that for which they are evolved...
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This note was uploaded on 03/22/2012 for the course PB 360 taught by Professor Wentworth during the Fall '08 term at N.C. State.

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