Solved by a verified expert:Bio 287 Intro Ecology Fall 2014 Assignment A4Using a life table to predict the population size in future yearsYou survey a population during a single week at the end of the breeding season and find 180 newborns,70 1-year olds, 30 2-year olds and 10 3-year olds (this is the current year, Y1). Mortality occurs duringthe winter before the next breeding season. The maximum life span is three years, so there are no fouryear olds.• Draw a life table and calculate survival rates and survivorship. Closely look at the calculationspresented in Table 10.1 in your textbook if you have trouble – your table is basically the same withdifferent starting data. I’ve given you an empty table below but you can also do it in Excel or anotherprogram.Age x Survival rate Sx Survivorship lx Fecundity Fx • Your fieldwork in past years has documented that the fecundity of newborns = 0, 1-year olds = 1, 2year olds = 2, and 3-year olds = 0.5. Using these fecundity data, calculate how many individuals areexpected to be in each age group in the next time period, Y2 (Year 2, after the next breeding season).Important: Use the survival rate you calculated above and follow the steps outlined in Table 10.4.Repeat this for three more years (Y3, Y4, Y5). • What is the total population size in each of these years? What is lambda for these years? Is lambdaconstant? Do you expect it to be constant at some point? Compare this to the growth of thehypothetical population described in Figure 10.8 (A) and (B). • Submit both tables and your answers to the questions above as a file on Moodle.Year:Newborns1-year olds2-year olds3-year oldsPop. size:Lambda: Y1 (current) Y2 Y3 Y4 Y5
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