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GROWTH MODELS  What are the assumptions for an exponential growth model?  Is this realistic?

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Presentation on theme: "GROWTH MODELS  What are the assumptions for an exponential growth model?  Is this realistic?"— Presentation transcript:

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2 GROWTH MODELS

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4  What are the assumptions for an exponential growth model?  Is this realistic?

5 GROWTH MODELS

6 LOGISTIC GROWTH PRACTICE

7 GROWTH MODELS  Logistic growth in the real world…

8 GROWTH MODELS

9 LIMITING FACTORS Density dependent When factors directly affect birth and death rates. Density independent When factors have little to do with population density.

10 LIMITING FACTORS  Density dependent prey/predator relationship

11 DISPERSION  Influences growth of populations  Influenced by limiting factors (especially density-dependent)

12 DISPERSION

13 AGE STRUCTURES

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15  http://www.prb.org/Multimedia/Video/2013/population- structure-engage-short.aspx http://www.prb.org/Multimedia/Video/2013/population- structure-engage-short.aspx  http://grist.org/population/2011-09-25-7-billion-in-7-minutes- science-magazine-explains-it-all-video/ http://grist.org/population/2011-09-25-7-billion-in-7-minutes- science-magazine-explains-it-all-video/


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