Lecture 24 Part I goals - Explain the concept of...

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Lecture 24 Part I - Goals Part I: SPECIES ABUNDANCE AND DIVERSITY Be able to: Explain the concept of a community. Identify and briefly explain the major components of community structure. Graphically depict lognormal distributions of species abundances based on the relative intensity with which the community was sampled. Given graphs of lognormal distributions of species abundances, identify the relative intensity of sampling that produced each distribution. From community rank abundance curves, identify the species richness and relative evenness of each community. Explain the dependence of species evenness on species relative abundances. Given data on the number of individuals of each species in a community and the formula for the Shannon-Weiner diversity index, calculate the value of the diversity index. Explain the dependence of species diversity on species richness and evenness. Explain the general relationship between environmental complexity and species diversity.
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Unformatted text preview: Explain the concept of disturbance. Distinguish between disturbances and other environmental processes or events. Explain the intermediate disturbance hypothesis, including the processes causing decreased diversity at lower and higher rates of disturbance, and the characteristics of species that would exist in communities of low, intermediate, and high diversity. Given data on species diversity and disturbance rates, evaluate to what degree their relationship follows the predictions of the intermediate disturbance hypothesis. Explain linkages among the above. Reading: Chapter 16. Introduction. Required . Species abundance. Required . Species diversity. Required . Investigating the evidence. Not required. Environmental complexity – Forest complexity and bird species diversity. Required . Environmental complexity – other sections. Not required. Disturbance and diversity. Required . Applications. Not required. Summary. Required ....
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