BIOL 226 Chapter Notes - Chapter 53: Demographic Transition, Semelparity And Iteroparity, Maximum Sustainable Yield
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Write down the 6 key concepts of the chapter. Dynamic biological processes influence population density, dispersion and demographics. The exponential model describes population growth in an idealized, unlimited environment. The logistic model describes how a population grows more slowly as it nears it carrying capacity. Life history traits are products of natural selection. Many factors that regulate population growth are density dependent. The human population is no longer growing exponentially but is still increasing rapidly. Population: group of individuals of the same species in the same area. Density: the number of individuals per unit area or volume. Dispersion: the pattern of spacing among individuals within the boundaries of the population. Clumped: the most common, where individuals are aggregated in patches (ex: sea stars) Uniform: often as a result of antagonistic social interactions such as territoriality (the defence of a bounded physical space against encroachment by other individuals (ex: albatrosses)
