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A scenario where a small island may or may not have a huge number of species.
Introduction:
In
Edward O. Wilson and Robert MacArthur proposed ‘The Equilibrium Model of Island Biogeography’ in 1960. It is a comprehensive model that explains uneven distribution on the new island.
According to Edward O. Wilson and Robert MacArthur, the number of species present on an island reflects the balance between the rates of immigration and extinction. The model predicts that island size is directly proportional to the number of species. The number of species increases with an increase in island size. The number of species decreases with decrease in the distance from the source pool.
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Principles of Biology
- Which are threatened species ? How can we save them ?arrow_forwardDo you think generalist or specialized species would be better able to adapt and avoid extinction if the environment changed rapidly, for example, as a result of forced climate change? Why?arrow_forwardWhat limits species’ ranges?arrow_forward
- Why are species that live at the tops of mountains at increased risk of extinction due to climate change? a. The colder temperatures at the tops of mountains gradually increase, and the species at the tops of the mountains are displaced by species at lower elevations moving up. b. The species at the tops of the mountains are adapted to moving up and down the mountains and species at lower elevations are displacing them as they move down the mountains. c. The species at the tops of the mountains are adapted to lower oxygen and climate change increases oxygen content in the air. d. Species at the tops of mountains do not have the genetic diversity for adaptation that lower-elevational species do. Therefore species at the tops of the mountains are more likely to go extinct.arrow_forwardHow can you fix the problem of overpopulation of prey (deer) in an ecosystemarrow_forwardTwo islands lie off the coast of Florida. One is larger and the other is closer to the mainland. What determines which one will have more species?arrow_forward
- If you wanted to protect 10 species how large a habitat would you need? In other words, how large a park (or protected area) do I need? Based on the picturearrow_forwardSome people declare that we shouldn’t worry about endangered species because extinction has always occurred. How would you respond to this view?arrow_forwardHow do you think your daily habit might contribute directly or indirectly to the extinction of some bird species? List three thingsarrow_forward
- Why is it difficult to predict which species will be driven extinct by global warming?arrow_forwardWhich type of species produces many offspring , each of which has a small chance of surviving to maturity? a) Specialist species b) Generalist species c) r - selected species d) K- selected speciesarrow_forwardIdentify a species that your group thinks is ok to drive to extinction and justify the reasons for this decision. Can you anticipate any consequences of losing this species from the Earth?arrow_forward
- Biology: The Dynamic Science (MindTap Course List)BiologyISBN:9781305389892Author:Peter J. Russell, Paul E. Hertz, Beverly McMillanPublisher:Cengage Learning