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Monday 4.14

Monday 4.14. DUE today: Only Bugs/Stream data NOT DUE: Anything else DUE next Monday: AA3Packet, Wbirds – details TBA Schedule adjustments x 3 WUSTL seminar cancelled this week All got 10 EP last week Sign up for owl prowl!! 30 SP!! Blackboard shutdown R, F: bio271.weebly.com PQ #12

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Monday 4.14

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  1. Monday 4.14 • DUE today: Only Bugs/Stream data • NOT DUE: Anything else • DUE next Monday: AA3Packet, Wbirds – details TBA • Schedule adjustments x 3 • WUSTL seminar cancelled this week • All got 10 EP last week • Sign up for owl prowl!! 30 SP!! • Blackboard shutdown R, F: bio271.weebly.com • PQ #12 • Grade distribution • See Small Mammals • Discussion on Slime Molds, Birds, Ch 13 • Lab 10B: Plant competition

  2. PQ #12 • On a sheet of paper, answer the following: • What concept, idea, etc. from the assigned readings (13.1, 13.2, wbirds thru #11, Lab 10, slime molds) was most unclear? (That is, what do you still have questions about, or what did you understand the least?) • What part(s) of this same concept, idea, etc., do you understand? (That is, which part(s) can you explain clearly or which make sense?) • With both of these responses in mind, what can or will you do to prepare for this concept, idea, etc. appearing on an exam?

  3. Group 1: Exam: 76% PQ: 76.6% Total: 836.3 pts Group 2: Exam: 66% PQ: 51.1% Total: 718.3 pts Read. The. Book.

  4. Small Mammals in Missouri All images are from Wikimedia Commons, unless otherwise identified

  5. Eastern cottontailSylvilagusfloridanus

  6. Nine-banded armadilloDasypusnovemcinctus

  7. Eastern spotted skunkSpilogaleputorius

  8. Striped skunkMephitis mephitis

  9. OpossumDidelphisvirginiana

  10. Gray foxUrocyoncinereoargenteus

  11. American minkNeovisonvison

  12. Least weaselMustelanivalis

  13. Eastern moleScalopusaquaticus

  14. Southern short-tailed shrewBlarinacarolinensis

  15. Discussion: Slime Molds • PQ Questions • Slime Molds: Crespi paper • If cooperation represents the “core of sociality,” are microorganisms “social?” • What is altruism? Does it advance fitness? Inclusive fitness? • Hamilton’s rule: Help can be given if RgB – C > 0 • If not? • If Rg is low? • If B is low? • High incidence of high Rg in haplodiploid systems (many bees and wasps)

  16. Discussion: Wbirds • #1: Hypothesis in an “If X happens, then we can expect to see Y.” Let X be the definition of your dependent variable. (hint: inter/intra) • #6: Is color brightness important to other males, to females, or to both? • #7: If X, then Y. • #9: similar to #6 • #11: ??

  17. Discussion: Ch 13 • Competition is essential for selection. • If resources are limiting, we expect some individuals to be better at getting available resources than others. • What happens to the individuals that are better at getting resources?

  18. Ch 13: Competition • Operates at two levels: • Intraspecific competition. • Interspecific competition. • Which do you think is more important?

  19. Eco-? • Once again, we can see that foundations of ecology have borrowed heavily from principles of economics • Consider Burger King vs McDonalds. • Do they compete? • For what? • Are their “niches” the same?

  20. Eco-? • Once again, we can see that foundations of ecology have borrowed heavily from principles of business • Consider Burger King vs McDonalds. • Do they compete? • For what? • Are their “niches” the same? • Consider a third fast food restaurant

  21. How to “win?” (at business or biology) • “Find a need and fill it.” • Henry Kaiser, entrepreneur • So, if you were going to open a fast food restaurant, what would you do? • Mimic a successful formula? • Try something different?

  22. Classic competition experiment, GeorgyGause • Two spp of Paramecium, grown separately,

  23. Paramecium • BUT, when grown together,

  24. Competitive Exclusion principle • “No two species can occupy the same niche at the same time.” • Obvs, this only works if Resources Are Limited • Next up, models (L-V) of how these principles overlap to predict dynamics. Stay tuned!

  25. Lab 10B: Competition • Start with HALF the number of seeds instructed for all pots and all treatments • In one week from today (4.21), thin to max final # (rows 3 and 5 of table)

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