Biology: A Guide to the Natural World with mybiology" (4th Edition)

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KroghS10.005 Population March 28, 2011 Topic 13 - Chapter 33 Population Ecology I. Introduction to the Study of Ecology A. Levels of Organization Studied by Ecologists: Fig. 1.6 and 33.2 1. Organism -> Population -> Ecosystem -> Biosphere 2. Definitions: Population : Interacting and Interbreeding members of the same species Community : Interacting populations of all species within an ecosystem Ecosystem : The community, their physical environment, and their interactions B. Ecology - The scientific study of ecosystems C. Ecology is not Environmentalism II. CARRYING CAPACITY (K) A. Maximum Population Size (Density ) that the environment can Sustain B. Carrying Capacity illustrated by Logistic Growth Model ( Fig. 33.5b) C. Different for Each Species in Each Ecosystem D. Death rate is equal to Birth rate: Intraspecific Competition is intense: "Survival of the Fittest" III. GROWTH RATE A. Factors that Determine Population Growth ( I ) 1. Number of Births and Deaths 2. Emigration (migration out) 3. Immigration (migration in) 4. I = Births + Immigration - Deaths - Emigration
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B. Intrinsic Rate of Increase
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Topic13-PopulationEcology - KroghS10.005 Population March...

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