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23 terms

BIOL 101 Chp 53: Population Ecology

This flashcard set includes the vocabulary words and definitions from Chp 53: Population Ecology (Biology 9E by Campbell et al, 2011). Find more biology resources at: http://robswatski.virb.com
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population ecology
the study of populations in relation to their environment
population
a group of individuals of a single species living in the same general area
density
the number of individuals per unit area or volume
dispersion
the pattern of spacing among individuals within the boundaries of the population
mark-recapture method
a sampling technique used to estimate the size of animal populations
immigration
the movement into a population of new individuals from other areas
emigration
the movement of individuals out of a population
territoriality
the defense of a bounded physical space against encroachment by other individuals
demography
the study of the vital statistics of populations and how they change over time
life table
age-specific summary of the survival pattern of a population
cohort
a group of individuals of the same age, from birth until all are dead
survivorship curve
a plot of the proportion or numbers in a cohort still alive at each age
life history
the traits that affect an organism's schedule of reproduction and survival, from birth through reproduction to death
semelparity
reproduction in which an organism produces all of its offspring in a single event; also known as big-bang reproduction
iteroparity
reproduction in which adults produce offspring over many years; also known as repeated reproduction
exponential population growth
an increase in the number of individuals in an ideal, unlimited environment, represented by a J-shaped curve when population size is plotted over time
carrying capacity
the maximum population size that can be supported by the available resources
logistic population growth
an increase in the number of individuals that levels off as population size approaches carrying capacity
K-selection
a life history in which relatively few offspring are produced and each offspring has a good chance of survival
r-selection
a life history in which many offspring are produced but each offspring has a poor chance of survival
density independent
referring to any characteristic that is not affected by population density
density dependent
referring to any characteristic that varies according to an increase in population density
population dynamics
the study that focuses on the complex interactions between biotic and abiotic factors that cause variation in the size of populations