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20 Cards in this Set
- Front
- Back
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What is the term used to describe a group of individuals of the same species that inhabit a given area?
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population
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The _________ of a population describes its spatial location and is based on the presence or absence of individuals.
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distribution
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What term describes the area that encompasses all individuals of a species?
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geographic range
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True or false. Individuals are not evenly distributed throughout the geographic range of a population.
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true
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What term describes the number of individuals in a population?
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population density
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What term describes the number of individuals per unit area or per unit volume?
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abundance
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Which population distribution pattern is represented when an individual's position is independent of others?
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random
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Which population distribution pattern is represented by the results of negative interaction among individuals?
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uniform
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Which population distribution pattern is represented by the results of patchy resources, social groupings, etc.?
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clumped
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What is the formula for population size?
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density * area
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What reflects the number of individuals per unit of available living space?
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ecological density
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Determining density requires __________.
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sampling
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What is a sampling method for plants and sessile animals?
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counting the organisms in a subsample (quadrats)
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What are two sampling methods for mobile animals?
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capture-recapture
mark-recapture |
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What is the term that describes the count of vocalizations, scat, tracks, or some other sign of presence?
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indices of abundance
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The ____ _________ of a population is determined by identifying the ages of its members.
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age structure
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What are the techniques used for aging animal populations?
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mark and follow
tooth wear growth rings in teeth, horns, ear bones, etc. |
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What are the techniques used for aging plant populations?
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mark and follow
diameter at breast height (dbh) - shrubs and trees counting annual rings |
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What structure represents the age structure of a population at a certain period in time?
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age pyramid
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The age structure is a product of the age-specific patterns of what two things?
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mortality and reproduction
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