Different populations have different numbers of individuals of different ages. Consider the human populations of Mexico and Sweden in 1990. Mexico had more individuals in total than Sweden, and a larger fraction of their population was of child bearing age or younger (Figs. 2.1a, 2.1b).
CITATION STYLE
Stevens, M. H. H. (2009). Density-independent Demography. In A Primer of Ecology with R (pp. 33–60). Springer New York. https://doi.org/10.1007/978-0-387-89882-7_2
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