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Ecology: Lectures 14-16

Ecology: Lectures 14-16. Predation November 2, 2005. Lotka-Volterra equation: Prey isocline ( d V/ d t = 0). Fig. 15.1a. Lotka-Volterra equation: Predator isocline ( d C/ d t = 0). Fig. 15.1b. Lotka-Volterra model: with both predator and prey isoclines. Fig. 15.1 c.

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Ecology: Lectures 14-16

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  1. Ecology: Lectures 14-16 Predation November 2, 2005

  2. Lotka-Volterra equation:Prey isocline (dV/dt = 0) • Fig. 15.1a

  3. Lotka-Volterra equation:Predator isocline (dC/dt = 0) • Fig. 15.1b

  4. Lotka-Volterra model: with both predator and prey isoclines • Fig. 15.1 c

  5. Lotka-Volterra prediction:Predator-prey flux through time • Fig. 15.1 d

  6. Rosenzweig-MacArthur: Stable cycle • Fig. 15.3 a

  7. Rosenzweig-MacArthur: Stable/dampened oscillations • Fig. 15.3 b

  8. Rosenzweig-MacArthur: Unstable/increasing oscillations • Fig. 15.3 c

  9. Rosenzweig-MacArthur: Refuge • Fig. 15.3 d

  10. Gause’s predation experiments:Didinium predation on Paramecium • Fig. 15.4

  11. Huffaker’s experiments: mite predation and complex environments • Fig. 15.6

  12. Functional responses of predator to prey concentrations • Type 1 response: Fig. 15.7 a

  13. Functional responses of predator to prey concentrations • Type 2 response: Fig. 15.7 b

  14. Functional responses of predator to prey concentrations • Type 3 response: Fig. 15.7 c

  15. Prey switching • Fig. 15.10

  16. Aggregative response • Fig. 15.12

  17. Optimal foraging: bluegill sunfish Fig. 15.16

  18. Chemical defense/toxicity/ warning coloration

  19. Warning coloration From Campbell et al., Biology

  20. Batesian mimicry • Harmless hawkmoth larva resembles the diamond-shaped head of a poisonous snake From Campbell et al., Biology

  21. Müllerian mimicry • Both the cuckoo wasp and the yellow jacket deliver toxic stings. From Campbell et al., Biology

  22. Cryptic coloration • Poorwill and frog From Campbell et al., Biology

  23. Lynx and hare cycling • Fig. 16.19

  24. Hare and winter vegetation (“browse”) cycling • Fig. 16.9

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