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Re: Copeing with mammals

On Sat, 27 Nov 2004, David Marjanovic wrote:

> Yep -- and it seems to occur extremely rarely. Every university course and
> textbook on ecology insists that there is natural selection against
> competition because even for the best competitor competition needs more
> energy than no competition. This is given as the explanation for why
> biodiversity is as high as it is: in order to escape competition, species
> specialize into smaller and smaller ecological niches. High biodiversity is
> "the ghost of competition past".

This shouldn't be taken out of context.  It refers to competition in
today's ecosystem--_micro_evolution, if you will.  It doesn't take into
account massive influxes of new species, or massive new evolutionary
developments.  In these cases, the energy cost of taking over might
entirely favor the usurper.