BIL 150 Lecture Notes - Lecture 1: United States Census Bureau, Logistic Function, Exponential Growth
26 Nov 2017
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Document Summary
Contemporary issues in biology: growth of earth"s population. Zero population growth-per capita birth rate = death rate. Carrying capacity- the max population size a particular environment can support. Megacity is more than 10 million ppl. United nations and us census bureau keep track of the population. 2 curves for the usa because immigration directly affects the growth rate. Immigration and nationality act (1965)- 10. 3 million illegals, 30 million legals. Populations of less developed countries continue to keep growing exponentially, do not level off. 60 million ppl in china died bc of famine. Replacement level fertility (rlf)- the level of fertility at which a couple has only enough children to replace themselves (about 2 children, actually 2. 1 children accounting for infant mortality) Low fertility level in developed countries, high in undeveloped countries. Fertility rate (fr) high = less contraceptive use, fr low = high contraceptive use.
