14.3 population density and distribution study guide – Flashcards
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Population density
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A measurement of the number of individuals living in a defined space
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Formula for population density
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# of individuals/area(units^2)=population density
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Population dispersion
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The way in which individuals of a population are wide spread in an area or in volume
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Clumped dispersion
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Close together,to facilitate mating, gain protection, or access food resources
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Uniform dispersion
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Territorial, compete for limited resources, distant from eachother
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Random dispersion
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Spread randomly within an area or a volume
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Survivorship curve
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A generalized diagram showing the number of surviving members over time from a measured set of births
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Type 1 survivorship
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Life history common among large mammals, including humans
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Type 2 survivorship
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Birds,Small mammals, some reptiles. Shows survivorship rate equal at all ages of life
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Type 3 survivorship
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High birth rate and high infant mortality rate. Invertebrates, fish, amphibians and plants
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Reproductive strategy
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Produce a lot of offspring Survival from birth to death
