Exam 11: Population Growth and Regulation

Species A is a nonreproductive age shrub you have been studying for 3 years after a wildfire destroyed all the vegetation on your field site. Based on studies of Species A at a control, no wildfire field site, it has an expected survival rates of S₁ = 0.75, S₂ = 0.65 S₃ = 0.55. During year 0 in your wildfire field site, there were 340 individuals tagged. Assuming the same survival rate at the wildfire site as the control site how many plants would you expect in: (a) Year 1? (b) Year 2?

Briefly explain why calculating human population growth and carrying capacity is often more difficult than determining population growth and carrying capacities in other species.

The top five countries currently add approximately 40 million people a year to the world's population. Which of the following countries is not one of these top five?

Refer to the table. -The table shows the survivorship, fecundity, and life expectancies for U.S. females of various ages as of 2009. Approximately 1.5 million females were born in the United States in 2009. Based on this fact and the life table data, how many of them should we expect to live to at least age 100?

A population of turtles contained 342 individuals at the end of the year 2013. Since then, 44 have died, 37 were born, 17 immigrated, and 6 emigrated. What is the population size now?

What was the difference between the treatment and the control groups in Arcese and Smith's studies of the effects of density on song sparrows?

Which organism has a survivorship curve most like that of humans living in the United States?

Life tables can do all of the following except

Species A is a nonreproductive shrub you have been studying for 3 years after a wildfire destroyed all the vegetation on your field site. In year 0, 340 individuals were tagged. In year 1, 288 were still alive. In year 2, 250 were alive. In year 3, 200 remained. The data from the control, no wildfire site, documents that species A becomes reproductive in year 3 with a $\lambda$ of 1.21. Identify the density-independent factor(s) and some of the density-dependent factor(s) in this scenario and role they play in determining species A's population density.