WFSC 403 6th Edition Lecture 11 Outline of Last Lecture I Finish Chapter 9 a More Realistic Models Matrix b Essay Good Model Page 157 c r intrinsic realistic Page 147 II Start Chapter 10 Competition a Basic Concepts b Theory Outline of Current Lecture I Basic Concepts a K Selection b Niche Segregation Differentiation c Resource Competition d Interference Competition II Theory a Phase Planes Isoclines b L V model c Tilman Model Current Lecture Key concepts page 165 When does competition occur o When there aren t enough resources to go around o Lotka Volterra model L V model predicts who will win resources based on the rate of resource utilization o It can be difficult to pin down when competition occurs What happens if there is intense competition over a long time o The species develop adaptations Darwin Finches big beaks for big seeds little beaks for little seeds R selection o Grow really fast invasive species exploit resources o No real competition very rapid growth relatively empty environment K selection o Carrying capacity What conditions These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute o Evolve under circumstances of intense competition o Limited resources o Good competitors lower intrinsic rate of increase Scramble competition vs interference competition o Scramble not enough pizza everyone jumps up to get it all the pizza is gone o Interference someone threatens anyone who is going to get up with a gun According to the book scramble has no clue winner or loser according to Dr Grant there is a winner and loser the loser is the one who doesn t have access to the resource Result is the same regardless of type of competition Phase Plane Essay page 185 o Does not have time on x axis o Not in chronological order o Competition coefficient Alpha competition coefficient represents equal competition impact of species two in terms of the impact on species 1 Where did intercept points come from o Where and when the population N1 0
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