ZOL 355 Lecture 20 Outline of Last Lecture 1 Factors that influence population growth 2 Nt 1 Nt B D 3 Exponential growth a Slope b Effects on r Outline of Current Lecture 1 Population growth 2 dN dt 3 Geometric growth a nt No t 4 Nt 1 Nt Current Lecture 1 population growth part 2 2 dN dt 3 geometric growth equation a describes the relationship between population size and time for a population that has geometric growth b nt No t c No initial population size d geometric growth rate i change in population size time 4 Nt 1 Nt a if there are 100 individuals in year 1 and 200 in year two 0 5 200 ind 100ind 2 a For this equation we must measure population size at the same time each year because births and deaths occur at unique times b To forecast populations Nt No t
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