Make a life cycle diagram from the following life table.Age xNxlxmx010001015000.5021200.12331100.1140.50123430.12/0.5 = 0.240.11/0.12 = 0.92
Calculate population growth from the life table.Age xNxlxmx010001015000.5021200.12331100.114R0=Σ lx• mxΣx • lx• mxR0ln R0TT=r=Lifetime reproductive successGeneration timePer capita rate of population growthGeometric rate of changel= er
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Calculate population growth from the life table.Age xNxlxmxlx∙mxx∙lx∙mx01000100015000.500021200.1230.360.7231100.1140.441.32R0=Σ lx• mxΣx • lx• mxR0ln R0TT=r==0.8 (not replacing)l= er=2.04/0.8 = 2.55 yrs= -0.088= 0.92
Outline•Measuring demographic rates–Survivorship curves–Architecture of life tables•Density-dependence: –Test: demographic rates change with population density–Consequence: Logistic vs. geometric or exponential population growth•Age structure: outcome of demographic rates over time