BIOB50H3 Lecture : BIOB50Winter2012 Lecture 22.docx - includes images and relevant textbook notes!
Document Summary
Biob50winter2012 lecture 22: lottery competition and neutral theory (chapter 18: the competitive exclusion principle : two species that use a limiting resource in the same way cannot coexist. Species are lost at each filter so local communities contain only a fraction of species in the regional pool. In practice, all filter work at the same time, rather than in a series as the figure suggests. In this model, species must have similar interaction strengths and population growth rates, and the ability to disperse quickly to disturbances that free up resources: all species have equal chances of obtaining resources, which allows coexistence. Reef of australia he found that species of the new occupant was random and unrelated to the species that had previously occupied the site. Nonequilibrium theories (continued: this mechanism might be particularly relevant in very diverse communities where so many species overlap in their resource requirements.
