Brey-Lecture 7

Brey-Lecture 7 - Fundamental Niche Hypotehtical Realized...

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Fundamental Niche Hypotehtical Realized Niche actual Possible Outcomes of niche competition Competitive exclusion Character displacement Resource/ niche partitioning Gause’s principle of competitive exclusion No 2 specifies can completely ecologically overlap each other If they overlap one will eliminate the other New competitor can come in and drive other species out Gause’s Experiments in competition No competition fill fundamental niche Aurialis and caudalum First experiement grew them in separate flasks (200 per flask) 2 nd experiment grew them in same flask very different outcome o One of them driven to extinctition – fitness is zero o Aurlialis is beloow 150 but before was 200 o Even though it won it had a lose o Natural selection for slight differences become important Character disoplacement – increased differences between species where they are sympatric Sympatric Separated Allopatric do not vary geographically
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This note was uploaded on 11/09/2011 for the course BIO 102 taught by Professor Brey during the Spring '08 term at Rutgers.

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Brey-Lecture 7 - Fundamental Niche Hypotehtical Realized...

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