Biology 1B, Ecology Lecture 6, Page 1 Professor Resh • Spring 2007*Assigned readings, 7th Edition pp. 19-26, 1078-10976th Edition pp. 16-21, 1090-1091Ecological StudiesOutline of Lecture 6A. An example of ecological study• Experiment 1• Experiment 2• Experiment 3*** The objective of Lecture 5B. Questions to answer from this lecture* 12 questions***The objective of this lecture is to discuss howthe experimental method often works in practice(how observation leads to hypothesis testing) andhow it often occurs in incremental steps.***A. An example of ecological study• Experiment 1What is the effect on the aquatic insect(a caddisfly) Helicopsyche borealis onalgae, and vice versa?• Experiment 2Validation of experiment 1 and establishunderlying cause of the observed effect.• Experiment 3Validation of experiments 1 and 2 atlarger scales.Biology 1B, Ecology Lecture 6, Page 2 Professor Resh • Spring 2007*Assigned readings, 7th Edition pp. 19-26, 1078-10976th Edition pp. 16-21, 1090-1091Ecological StudiesB. From this lecture, be able to answer thefollowing questions:1. Who is Helicopsyche?2. What is benthos?3. What is periphyton?4. What are pilot or reconnaissancestudies useful for? Why do weconduct them?5. What are exclusion experiments?6. How do we determine gross primaryproductivity / net primaryproductivity?Biology 1B, Ecology Lecture 6, Page 3 Professor Resh • Spring 2007*Assigned readings, 7th Edition pp. 19-26, 1078-10976th Edition pp. 16-21, 1090-1091Ecological Studies7. What are uncontrolled variables?8. What are cage experiments? Whatproblems do they have?9. What is a food-supplementationexperiment?10. What influence can abiotic, density-independent factors have on biotic,density dependent factors?11. What are the advantages anddisadvantages of mesocosms?12. How do field and laboratoryexperiments
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