Why is it so difficult for species to leave their ecological niche?

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  • Colwell, Robert K. and Thiago F. Rangel. "Hutchinson's duality: The once and future niche." PNAS. Nov. 17, 2009. (Sept. 12, 2010)http://www.pnas.org/content/106/suppl.2/19651.full
  • Holt, Robert D. "Bringing the Hutchinsonian niche into the 21st century: Ecological and evolutionary perspectives." PNAS. Nov. 17, 2009. (Sept. 12, 2010)http://www.pnas.org/content/106/suppl.2/19659.full
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