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- 2. The graph below shows changes in human population numbers over time. A consequence of these changes is1. Answer the following questionsa)How long will it take for a dolphin population to be reduced by 50% if the intrinsic rate of increase is -.04?b)In the last 70 years the blue whale population decreased from 340,280 to 4,727. What is the intrinsic rate of decrease (r)? c)If the current intrinsic rate of increase for blue whales is .1, how long will it take the current population of 4,727 to climb back to 340,280?16. Tamaraw has been in the critically endangered list since the year 2000. One of the reasons is the habitat destruction that forced them to move further inland into the thick forest. Which of the following factors affect the population of the tamaraw? * A. disease and parasites B. emigration C. predation D. competition for resources 17. What conservation status is referred when there is no reasonable doubt that the last individual has died such as to what happen to the Saber-toothed tiger and Dodo? * A. Endangered B. Extinct C. Vulnerable D. Critically endangered
- 1. The best example of a population in the list below is the a tiger salamander tadpoles in 2006. b nvertebrates in Elk Island National Park in June 2005. c Canadian darner dragonflies in Kerry Wood Nature Reserve on June 21, 2005.1. The northern hairy-nosed wombat has experienced historical population declines, though population have stabilized recently due to conservation efforts. While studying them researchers noticed the following fluctuations in (effective) population size: Year 1: 100 individuals Year 2: 90 individuals Year 3: 50 individuals Year 4: 75 individuals Year 5: 90 individuals Year 6: 95 individuals A. Given this information what is the long-term effective population size of this particular population over the six years?2.) Suppose that the carrying capacity of a second island is about 500, and the growth rate of a typical Common Gallinule population is around 0.18 when the population size is very small. The time that it takes to reach one-half of K is about 12 years. What will the population size be 15, 20, and 25 years after initial introduction of a few individuals to this island?
- 1. From the animals in the figure, which species could have a positive indirect effect on the Possum? 2. If you suspect that competition between Wallabies and Bandicoots is leading to coexistence, describe an example of a piece of evidence that would support your idea. 3. If Tasmanian devils become extinct in the wild due to DFTD, name a species other than cats that you expect would change in abundance as a result. Explain how you think that species' abundance would change and why.Figure 45.10b If the major food source of the seals declines due to pollution or overfishing, which of the following would likely occur? The carrying capacity of seals would decrease, as would the seal population. The carrying capacity of seals would decrease, but the seal population would remain the same. The number of seal deaths would increase but the number of births would also increase, so the population size would remain the same. The carrying capacity of seals would remain the same, but the population of seals would decrease.The per capita growth rate of a population where dispersal is not a factor is expressed as (a) i + e (b) b d (c) dN/dt (d) rN(K N) (e) (K N) K
- 14. Which of the following is NOT a factor affecting population growth? * A. Stability B. Natality C. Mortality D. Genetically modified organism 15. What term refers to the over-harvesting of species and natural resources to the point that the ecosystem or habitat cannot compensate or sustain itself? * A. Fragmentation B. Overexploitation C. Epidemics D. Pandemicdestion 6 Which statement describes the most likely outcome for the owl and toad populations in an environment in which skyglow and glare become factors? A. Skyglow causes the owl population to experience a decrease in hunting success; glare causes the toad population to experience a decrease in mating success. B Skyglow causes the owl population to experience a decrease in hunting success: glare causes the toad population to experience an increase in mating success. C. Skyglow causes the owl population to experience an increase in hunting success; glare causes the toad population to experience an increase in mating success. D. Skyglow causes the owl population to experience an increase in hunting success; glare causes the toad population to experience a decrease in mating success.11. What is a typical characteristic of an r-selected species? a. boom-and-bust popuation growth curve b. constant survivorship curve c. early loss survivorship curve d. high reproductive rate e. late loss survivorship curve f. lives in stable environoment g. low death rate h. short life span i. small body size j. stable age pyramid Please answer asap and type your answer and do not copy from anywhere please