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17 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Define: population growth
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The speed at which a given population grows.
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What does a population in a mature ecosystem do?
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The population growth remains relatively stable over a long term period. This means that the growth rate is zero.
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What is dynamic equilibrium or steady state?
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The growth rate is zero.
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What are the factors are effect population?
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Natality: birth rate
immigration: moving in Emigration: moving out Mortality: death rate. |
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What is the formula for population growth rate?
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(Natality + immigration) - (mortality + emigration)
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Define: open population
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A population in which Natality, mortality, immigration, and emigration are all acting.
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Define: closed population
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A population which only Natality and mortality are acting (not emigration and immigration)
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Define: biotic potential
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The maximum number of offspring that a species could produce, if resources were limited.
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What are the factors that determine biotic potential?
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Birth potential: the maximum number of offspring per birth
Capacity of survival: the number of offspring that reach reproductive age Procreation: the number of time that a species reproduces each year Length of reproductive life: the age of sexual maturity and the number of years the individual can reproduce. |
Babies cry pretty loud.
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Examples of limiting factors.
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Weather conditions, predators/prey relationships, and habitat degradation
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What do limiting factors affect?
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The carrying capacity.
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What are the abiotic factors that increase population?
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Favourable light
Favourable temperature Favourable chemical environment |
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Abiotic factors that decrease population?
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Too much or too little light
Too cold or too warm Unfavourable chemical environment |
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Biotic factors that increase population.
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Sufficient food
Low number or low effectiveness of predators Few or weak diseases and parasites Ability to complete for resources |
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Biotic factors that decrease population.
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Insufficient food
High number or high effectiveness of predators Many or strong diseases or parasites Inability to successfully complete for resources |
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What is the law of minimum?
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The nutrient in least supply is the one that limits growth.
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Define: carrying capacity
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The maximum population of a species that can be supported in defiantly by an ecosystem.
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