Term
Population Growth
Affect population growth rates and limit the number of organisms in the environment
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Definition
- Biotic: Competition, predation
- Abiotic: Temperature, pH, bottlenecking
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Term
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Definition
| Support mathematical evidence |
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Term
| Geometric Population Growth |
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Definition
- Abundant/unlimited resources
- Organisms have discrete, non overlapping generations
- Reproductive cycles operate on annual or seasonal cycles
- Only one generation at a time and grown in pulses (ex: annual plants)
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Term
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Definition
•Population is growing at maximum growth rate
•Population may grow slowly at first
•Over time, population grows faster and faster
•Successive generations differ in size by a constant ratio |
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Term
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Definition
Estimation of Population Size
- Where, Nt = number of individuals at time t, N0 = Number of individuals at initial time 0, l = number of offspring left by an individual during one time interval, and t = number of time intervals (in hours, minutes, days, etc).
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Term
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Definition
| Estimation of Population Growth Rate |
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Term
| Geometric versus Exponential Growth |
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Definition
- cannot be maintained indefinitely by a population
- used to describe populations with overlapping generations under conditions of abundant resources
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Term
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Definition
the per capita rate of increase
rate of population growth |
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Term
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Definition
| intrinsic rate of increase; maximum per capita rate of increase under "ideal'' or ''unlimited'' conditions |
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Definition
| difference between per capita birthrate and per capita death rate |
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Term
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Definition
Rate of population Growth
•As N increases, rate of population growth (DN/Dt) increases (exponentially); the slope gets steeper
•rmax is a constant |
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Term
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Definition
Exponential Growth
Population Size
Use this equation to estimate population size @ time t |
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Term
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Definition
maximum population size an environment can support (K) |
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Term
| Limitation for Exponential Growth |
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Definition
- cannot continue indefinitely
- will approach the carrying capacity of the environment
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