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Bio 230 study notes.pdf

Bio 230 study notes.pdf - Biology 230 Study online at...

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1. Apparent Competition Density of one species are suppressed by attraction of a shared predator. 2. Are k selected organisms quantitative or qualitative? Quantitative 3. Are r selected organisms quantitative or qualitative? qualitative 4. Biologist speculate aquatic plants are smaller because ..... ? aquatic plants are more r-selected and therefore less defended. 5. Biotic filtering The realized niche 6. Describe the characteristics of K selected organisms in defense Plan population is predictably present so herbivore are able to find it easily. There is resource limitation so difficult to replace lost plant tissue 7. Describe the characteristics of r selected organisms in defense r selected organisms appear and disappear from patches rapidly making it harder for herbivores to locate. Abundant resources allow lost plant tissues to be easily replaced. Low investment in defense (qualitative) 8. Describe the main ways in which plants defend themselves against herbivory. Chemical defenses , physical defenses and biotic defenses. 9. Exploitative competition Indirect interactions where both species are consuming the same resources 10. Habitat filtering The fundamental niche 11. How are alpha and beta competition coefficients related? They are related to the degree of niche overlap 12. How are specialists associated with increase extinction risk? Stuck with specific habitat for resource 13. How can predation increase species richness Through trophic cascades 14. How do abiotic factors limit populations? abiotic factors limit populations. 15. How do biotic factors limit populations? Biotic factors regulate populations 16. How does a physical pump contribute to ocean acidification Dissolved CO2 can react with water to form bicarbonate, and to a lesser degree carbonate, acidifying the ocean in the process. 17. How does a small island and more isolated islands compare to a larger island for the dynamic equilibrium graph. It moves the Seq to the left 18. How does biodiversity affect the functioning of ecosystems? ( 4 examples) Pollination -water purification -carbon fixation -stability 19. How does high productivity have an effect on different trophic levels? -enough plant biomass to support herbivores and predators - any increase in herbivore productivity is eaten by predators - no net increase in herbivore biomass - predator biomass increases with site productivity. 20. How does low productivity have an effect on different trophic levels ? Only plants are supported and plant biomass increases with site productivity. 21. How does medium productivity have an effect on different trophic levels? enough plant biomass to support herbivores. - any increase in plant productivity eaten by herbivores - no net increase in plant biomass. - herbivore biomass increases with site productivity 22.
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