Biology 1B, Ecology Lecture 6, Page 1 Professor Resh • Spring 2009*Assigned readings, 8th Edition pp. 18-247th Edition pp. 19-26, 1078-1097Ecological 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 2009*Assigned readings, 8th Edition pp. 18-247th Edition pp. 19-26, 1078-1097Ecological 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 2009*Assigned readings, 8th Edition pp. 18-247th Edition pp. 19-26, 1078-1097Ecological 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 differ?Biology 1B, Ecology Lecture 6, Page 4 Professor Resh • Spring 2009*Assigned readings, 8th Edition pp. 18-247th Edition pp. 19-26, 1078-109713. What about interspecific interactionsinvolving two or more species? Whatare the different types of effects onthe species involved? (“+” = benefit,“-” = detriment, “0” = no effect)Mutualism (+,+) (both organisms benefit)Commensalism (+,-)Amensalism (0,-)Neutralism (0,0)Predation, Parasitism (-,+)Competition
View Full Document
Unlocking...