Biology 1B Ecology Lecture 6 Page 1 Assigned readings 8th Edition pp 18 24 7th Edition pp 19 26 1078 1097 Ecological Studies Outline of Lecture 6 A An example of ecological study Experiment 1 Experiment 2 Experiment 3 The objective of Lecture 5 B Questions to answer from this lecture 12 questions The objective of this lecture is to discuss how the experimental method often works in practice how observation leads to hypothesis testing and how it often occurs in incremental steps A An example of ecological study Experiment 1 What is the effect on the aquatic insect a caddisfly Helicopsyche borealis on algae and vice versa Experiment 2 Validation of experiment 1 and establish underlying cause of the observed effect Experiment 3 Validation of experiments 1 and 2 at larger scales Professor Resh Spring 2011 Biology 1B Ecology Lecture 6 Page 2 Assigned readings 8th Edition pp 18 24 7th Edition pp 19 26 1078 1097 Ecological Studies B From this lecture be able to answer the following questions 1 Who is Helicopsyche 2 What is benthos 3 What is periphyton 4 What are pilot or reconnaissance studies useful for Why do we conduct them 5 What are exclusion experiments 6 How do we determine gross primary productivity net primary productivity Productivity is the rate of accumulation of biomass What is the difference between gross and net Professor Resh Spring 2011 Biology 1B Ecology Lecture 6 Page 3 Assigned readings 8th Edition pp 18 24 7th Edition pp 19 26 1078 1097 Ecological Studies 7 What are uncontrolled variables 8 What are cage experiments What problems do they have 9 What is a food supplementation experiment 10 What influence can abiotic densityindependent factors have on biotic density dependent factors 11 What are the advantages and disadvantages of mesocosms 12 How do field and laboratory experiments differ Professor Resh Spring 2011 Biology 1B Ecology Lecture 6 Page 4 Assigned readings 8th Edition pp 18 24 7th Edition pp 19 26 1078 1097 13 What about interspecific interactions involving two or more species What are the different types of effects on the species involved benefit detriment 0 no effect Mutualism both organisms benefit Commensalism 0 Neutralism 0 0 Predation Parasitism Competition Professor Resh Spring 2011
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