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What can you infer from this graph?

What can you infer from this graph?. POPULATION DYNAMICS. UNIT 2: ECOLOGY. Can populations grow unchecked?. Exponential Growth Population multiplies quickly Produces J-shaped curve Only occurs when there are enough resources for all to survive. Mostly unrealistic.

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What can you infer from this graph?

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  1. What can you infer from this graph?

  2. POPULATION DYNAMICS UNIT 2: ECOLOGY

  3. Can populations grow unchecked? • Exponential Growth • Population multiplies quickly • Produces J-shaped curve • Only occurs when there are enough resources for all to survive. • Mostly unrealistic

  4. How do populations grow realistically? • Populations grow then level out due to limiting factors. • Carrying Capacity- max. # of individuals an area can hold and still remain healthy. • Produces S-shaped curve

  5. What types of limiting factors limit population growth? • Two types:

  6. 1. DENSITY-DEPENDENT • Dependent on population size • Produces s-shaped oscillation around carrying capacity • Ex: food supply, predation, disease, living space, water availability, parasitism

  7. 2. DENSITY-INDEPENDENT • Affects the same percentage of population regardless of population size. • Shows a “boom & bust” curve • EX: natural disasters, human disturbances, climate, change of seasons.

  8. HUMAN POPULATION GROWTH • Currently our growth is exponential. • Exponential growth due to: • Advances in technology • Energy development • Advances in agriculture • Transportation • Medicine • We do not know our carrying capacity.

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