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Lecture 24 Part II goals - 7 Based on this concept and data...

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Lecture 24 Part II - Goals Part II: FOOD WEBS 1. Use a foodweb diagram to identify both consumer-resource species interactions and competitive species interactions. 2. Based on the magnitude and sign of direct interactions between species, predict which indirect effects are likely to be important in structuring a community. 3. Explain the logic behind Paine’s original (1966) keystone predator hypothesis. 4. Explain why Paine’s experimental removal of Pisaster decreased community species richness. 5. Use the principles of Paine’s work to predict the effects of predators on other communities. 6. Explain the expanded current concept of a keystone species (from Power et al. 1996).
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Unformatted text preview: 7. Based on this concept and data on species abundances and effects on community structure, distinguish between keystone species, dominant species, and other species (non-keystone, non-dominant). 8. Explain how mutualists may act as keystone species by maintaining species diversity. 9. Explain linkages among the above. Reading: Chapter 17. Introduction. Required . Community webs. Required . Indirect interactions. Required . Keystone species. Required . Investigating the evidence. Not required. Mutualistic keystones. Required . Applications. Not required. Summary. Required ....
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