Section 6: Graded Questions <1/1 Isle Royale Q6.1. What is the carrying capacity for moose in the simulation model of Isle Royale, prior to any changes in the weather? Submit moose Q6.2. Suppose the rate of plant growth on Isle Royale supported an equilibrium moose population of 450 moose. In this scenario, there are no wolves present, and the environment is stable. One day, 200 additional moose arrive on the island. What would you predict the moose population size to be 30 years later? (Enter your answer as a number.) moose Submit Q6.3. Imagine two new volcanic islands spring up in the middle of the ocean. Each island is quickly founded by a few individuals of a species of ground-nesting bird that requires very dry land (with little rain) to thrive. The two islands differ in rainfall, one wetter and one drier. Assuming that rainfall determines carrying capacity for these birds, and that rainfall is consistent over time, what might the growth curves for the bird populations look like over many years for the two islands? Time Drier Wetter Drier Wetter MacBook Pro Time Wetter Drier Wetter Drier NOTES QUESTIONS Section 6: Graded Questions < 1/1 > Isle Royale Q6.4. The graphs below depict hypothesized population dynamics (population size, N, vs. time) for a predator-prey system. Based on what you've learned in this lab by investigating moose and wolf population cycles, which graph best represents a predator-prey system, and which curve (blue or red) describes dynamics for the predator species? Time Time The graph on the left is the best representation, and the predator's curve is blue. The graph on the left is the best representation, and the predator's curve is red. The graph on the right is the best representation, and the predator's curve is blue. The graph on the right is the best representation, and the predator's curve is red. Submit Q6.5. What does the carrying capacity for moose on the island primarily depend on? The number of moose The number of wolves. The rate of plant growth All of the above Submit Q6.6. How does the average fat stores for mqose when there are no wolves on Isle Royale compare to average fat stores when there are many wolves? Average fat stores tends to be lower when there are many wolves. Average fat stores tends to be higher when there are many wolves. Average fat stores is not related to wolf presence. Average fat stores depends on how many wolves were initially introduced. NOTES QUESTION Section 6: Graded Questions < 1/1 Isle Royale < Qa NOTES Qu Use the following passage to answer the next three questions. A few individuals of a bird species fly to a small city that previously had no individuals of this species. The immigrant birds find that the city has adequate food and no predators. On average, each bird has four offspring per year and lives for two years. Q6.7. How will the population of birds change over the first few years? The population will grow steadily, gaining a constant number of birds each year. The population will grow more and more rapidly with each passing year. The population will grow steadily for a few years and then shrink steadily back to zero. The population's growth in the first few years will depend on the size of the city. Submit Q6.8. Imagine that after the birds have been living in the city for many years a second big flock of birds arrives. How will the bird population size change in the 10 to 20 years after the extra birds arrive? Choose the graph that best represents how the city's bird population should change over time. (Note: there are still no predators of these birds in the city.) Time Time Time Time