BIOL 230 Lecture Notes - Lecture 10: Pribilof Islands, Exponential Growth, London Academy Of Music And Dramatic Art
Document Summary
Reindeer on pribilof islands, alaska: 1910: 4 males and 22 female reindeer introduced to st. paul island. Increased to 2000 in 30 years (1940: 1944: 5 males and 24 female reindeer, introduced to st. matthew island. Increased to 6000 in 19 years: after reach peaks, quickly crashed. St. matthew went from 6000 to 42 in a short period of time. Lichens (significant component of the winter diet) had been eliminated. Exponential growth: population can grow exponentially when conditions are favorable, but exponential growth cannot continue indefinitely. Clean water will become scare and water bourn diseases and contamination more common. Many animal species that we rely on for food such as fish will go extinct. Understand that population growth is the difference between growth and deaths. Understand that changes in population size are the product of perc capita growth rate and population size. Explain the difference between geometric and exponential growth using examples from natural populations.
