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Immigration- individuals move into its range from elsewhere.

Emigration- individuals move out of the population’s range.

Population density- number of individuals per unit area.

Exponential growth-population grows at a faster rate.

Logistic growth- population grows slowly overtime then stops.

Demography- scientific study of human populations

Limiting factor- factor that controls the growth of a population.

Density-independent limiting factors- affect all populations in similar ways, regardless of population size and density.

Density-dependent limiting factors-operate strongly only when population density reaches a certain level.

Demographic transition- dramatic change from high birthrates and death rates to low birthrates and death rates.

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1. What type of population growth does the bacteria first undergo?
Exponential Growth

2. List at least two factors that will ultimately limit the bacteria population growth.
Amount of bacteria being produce(small birth rate) and disease that kills off bacteria

3. What do you think will happen to this bacterial colony over time?
It will decrease as soon as what they’re feeding off of decreases or dies out

4. Describe what causes logistic growth to occur.
Occurs when a population’s growth slows and then stops, following a period of exponential growth.

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https://www.youtube.com/watch?v=PdwnfPurXcs

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For over 50 years researchers from Michigan Technological University have been studying the relationship between wolves and moose on Isle Royale, located in the middle of Lake Superior. This long term study continues to surprise us with new discoveries on how the natural world works.

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Review “Wolf and Moose Populations on Isle Royale” line graph in notes

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Review “Wolf and Moose Populations on Isle Royale” line graph in notes

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On parts of Isle Royale, large, dense moose populations can eat so much balsam fir that the population of these favorite food plants drops. When this happens, moose may suffer from lack of food.

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Describe factors that keep a population from growing further once its carrying capacity is reached?

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Describe factors that keep a population from growing further once its carrying capacity is reached?

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Once a population reaches the carrying capacity of its environment, a variety of factors act to stabilize it at that size. When the birthrate and the death rate are the same, and when immigration equals emigration, population growth stops.

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Identify exponential growth graphs (J-shaped)  and logistic growth graphs (S-shaped)

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Identify exponential growth graphs (J-shaped)  and logistic growth graphs (S-shaped)

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An exponential growth is in a J-shape and is a rapid increase whereas logistical growth is in an S-shape and it grows overtime.