1Lecture 6: Jan. 15Species Interactions: Competition• Community Ecology• Ecological Niches & Fitness• Consequences of Competition- Competitive Exclusion- Key Field Experiments- Niche DifferentiationDiscussion Activity This WeekPopulation Ecology Simulations-read handout before you come to discussion (week 3)Check Qwizdom Points on SAMS https://cats.lsa.umich.edu/Reading: Ch. 53: 1214-1220Errors in Textbook: page 1199 in Ch. 52make sure you can do those problems...In box 52.2, which gives details on using exponential growth model, especially equation 52.7, there are some mistakes in the problems dealing with whooping crane populations – refer to problems #3and #4. My corrections follow:In #3, the text provided is fine, but the ‘helpful’ guidelines they give in telling you what N0and Ntequal are incorrect. N0 = 2 (1 breeding pair) and Ntshould be50 (25 breeding pairs). You should also know that (lambda)= λ= er, so by taking natural log of both sides of equation you can find r(they discuss this on page 1198). The correct answer is t = 4.64 years. In #4, N0should be2 (1 breeding pair) and Ntshould be50 (25 breeding pairs). The answer of 2074 is correct.Ecologists ask questions at a variety of scales...organismalpopulationcommunityecosystembiosphereA community is an assemblage of populations ofdifferent species that are interacting and living in a particular area.What is a community?
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