enviro - Ch6 overviews

enviro - Ch6 overviews - 6. How do species differ in their...

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Chapter 6: Overviews Page 1 1. What determines the number of species in a community? Species diversity is highest in the tropics and declines as we move from the equator to- ward the poles. 2. How can we classify species according to their roles in a community? Native Nonnative Indicator Keystone Foundation 3. How do species interact with one another? Competition Predation Parasitism Mutualism Commensalism 4. How do communities respond to changes in environmental conditions? New environmental conditions can cause change in community structure that lead to one group of species being replaced by other groups. 5. How do populations respond to changes in environmental conditions? Populations increase through births and immigration and decrease through death and emigration.
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Unformatted text preview: 6. How do species differ in their reproductive patterns? Some species have a large number of offspring and give them little parental care; other species have a few larger offspring and take care of them until they can reproduce. 7. What are the major impacts of human activities on populations, communities, and ecosystems? We eliminate many natural predators. Use some renewable resources faster than they can be replenished. We rely mostly on polluting fossil fuels. 8. What lessons can we learn from ecology about living more sustainably? Chapter 6: Overviews Page 2 Our lives, lifestyles, and economies are totally dependent on the sun and the earth. Everything is connected to, and interdependent with, everything else. We can never do just one thing....
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enviro - Ch6 overviews - 6. How do species differ in their...

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