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21 Cards in this Set
- Front
- Back
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Exponential growth
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Be able to draw graph. (starts low and slowly increases in a curve shape)
development at an increasingly rapid rate in proportion to the growing total number or size; a constant rate of growth applied to a continuously growing base over a period of time. |
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Doubling time
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the period of time required for a quantity to double in size or value
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Density dependent factors
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increasing population size reduces available resources limiting population growth
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logistic growth
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the initial stage of growth is approximately exponential; then, as saturation begins, the growth slows and at maturity, growth stops. (S-curve)
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Carrying capacity
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the amount of people that the earth can carry and sustain.
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food chain
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the chain from a food source to the ultimate consumer
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age structure diagram
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diagram showing the age distribution of a population. Different types include:
-Stable pyramid: unchanging pattern of fertility and mortality -stationary pyramid: low fertility and low mortality -expansive pyramid: a pyramid showing a large base, representing a very large number of children, and a small tip, representing a low number of elderly -constrictive pyramid: low numbers of young people ex: japan |
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food web
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a series of organisms related by predator-prey and consumer-resource interactions; the entirety of interrelated food chains in an ecological community
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Energy pyramid
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a depiction of the amount of energy in each trophic level of an ecosystem
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Producer
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produces energy
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Consumer
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consumes the energy produced
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chemical energy
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energy liberated by a chemical reaction or absorbed in the formation of a chemical compound
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thermal energy
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results in an ecosystem's temperature
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population
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all individuals of same species living in the same place at the same time
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community
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all living things living in the same place at the same time.
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ecosystem
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all living things and non-living things existing in an area
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Main point of Easter Island Essay
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Over-consumption and high rate of population growth will result in loss of all natural resources and eventually starvation and end of a population.
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Exponential Growth: power and relation to King's Chessboard
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King's chessboard demonstrates an extreme case of how quickly exponential growth can multiply a population.
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How is growth rate (r) determined for a population?
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Total births - total deaths=r
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How did industrialization impact global r?
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Technological and medical advances increased r tremendously. Economic choices since then have slightly decreased it from the extreme raise, but it is still much higher than it was 200 years ago.
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Explain how (K-N/K) impacts population growth in a logistic model
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K gets smaller and reaches 0 eventually
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