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Unformatted text preview: Population ecology assignment 4: Competition and ex- ploitation 1. Males of large marine mammal species like seals and walruses compete actively for mates. Does such competition make them more likely to show a tendency for coexistence, or for mutual exclusion, in areas where their ranges overlap? 2. You are studying a small, stable puddle of water where three phytoplank- ton species seem to survive based on balanced competition for simple re- sources. You find that the growth of these species is limited by access to light, nitrogen and phosphorous. a. What would you expect to happen if you added excess amounts of phos- phorous (ie., more than the plants can use) to the puddle? b. What would you expect to happen if you shaded the puddle so that there was barely enough light for individual phytoplankton to survive? 3. What mechanism of coexistence is described by each of the following ex- amples?...
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- Spring '12
- Population Ecology