BIOSC 0370 Lecture Notes - Lecture 12: Life Table, Inflection, Social Group
24 Apr 2018
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Population growth & regulation, under ideal conditions, populations can grow rapidly, populations have growth limits, population growth rate is influenced by: = b - d (per capita rates: while these per individual or per capita rates are not meaningful on an individual basis, they take on meaning at the population level, exponential growth. If number of births is larger than the number of deaths, the population is increasing. If b = d, no population growth: n = population size, nx+1 - nx = b - d. Let nx+1 - nx = change in n/change in time = dn/dt. Forms a j-shaped curve r is negative: population is decreasing exponentially. = er loge = (cid:396: exponential and geometric growth equations describe the same data equally well, populations are described as growing, constant or declining, a population is, growing. > (cid:1005) r > 0: constant. = (cid:1005) r = 0: declining. < (cid:1005), (cid:271)ut >(cid:1004) r < 0.
