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Ap Bio- Chapter 52
chapter 52 vocab words
Terms in this set (32)
The study of populations in relation to the environment, including environmental influences on population density and distribution, age structure, and variations in population size.
is a group of individuals of a single species living in the same general area.
is the number of individuals per unit area or volume.
is the pattern of spacing among individuals within the boundaries of the population.
the researchers place traps within boundaries of the population under study. Captured animals are marked with tags, collars, bands, or spots of dye, and then released.
the influx of new individuals from other areas.
the movement of individuals out of a population.
the defense of a bounded physical space against encroachment by other individuals.
is the study of the vital statistics of populations and how they change over time.
age-specific summaries of the survival pattern of a population.
a group of individuals of the same age, from birth until all are dead
a plot of the proportion or numbers in a cohort still alive at each age.
or fertility schedule, is an age specific summary of the reproductive rates in a population.
the traits that affect an organism's schedule of reproduction and survival (from birth through reproduction to death). there are three basic variables for this: when reproduction begins, how often the organism reproduces, and how many offspring are produced during each reproductive episode.
the production of thousands of small eggs in a single reproductive opportunity, and then they die.
they repeat the reproductive act annually for several years.
zero poulation growth
occurs when the per capita birth and death rates are equal.
exponential population growth
population increase under these ideal conditions, also known as geometric population growth. under these conditions, the per capita rate of increase may assume the maximum rate for species.
symbolized as K, as the maximum population size that a particular environment can support.
logistic population growth
the per capita rate of increase declines as carrying capaacity is reached.
a birth rate or death rate that does not change with a population density.
a death rate that rises as a population density rises.
focuses on the complex interactions between biotic and abiotic factors that cause variation in population size.
immigration and emigration can also influence populations. this is particularly true when a group of populations is linked.
the movement from the first toward the second state.
one important demographic variable in present and future growth trends is a country's....... the relative number of individuals of each age.
the number of infant deaths per 1,000 live births
live expectancy at birth
the predicted average length of life at birth.
concept summarizes the aggregate land and water are appropriated by each nation to produce all the resources it consumes and to absorb all the waster it generates.
the actual resource base of each country.
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