Lecture 33-cwo-diversity

Lecture 33-cwo-diversity - Roadm : ap Maintaining Dive...

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Maintaining Diversity A. Equilibrium 1) Niche partitioning 2) Habitat heterogeneity A. “Non-equilibrium” 1) Island biogeography 2) 3) Succession (patch dynamics) Roadmap :
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Diversity : 1. Local (alpha): # species within habitat 1. “Habitat” (beta): among-site diversity (e.g., ‘diversity of habitats’) 1. Regional (gamma): # species within geographic area ( γ = α β )
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Diversity : Increase regional diversity: 1. More species within a habitat (coexistence via resource partitioning) 1. More types of habitats
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Diversity : Non-equilibrium viewpoints: 1. No “winner” within a local habitat 1. Something prevents competitive exclusion
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mountaintops lakes and ponds Isolated habitats (“islands”): fragmented habitats islands
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Island Biogeography : No. species is a dynamic equilibrium between colonization and extinction. Given enough time (and the absence of continual colonization) … no species (extinction occurs)
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Island Biogeography : Patterns…
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Effect of Area larger islands contain more species than smaller islands note log scales (power function)
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Species Area Relationship S = species richness
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This note was uploaded on 07/13/2011 for the course PCB 4034C taught by Professor Osenberg during the Spring '11 term at University of Florida.

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Lecture 33-cwo-diversity - Roadm : ap Maintaining Dive...

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