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FUNCTIONAL RESPONSE PowerPoint Presentation
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FUNCTIONAL RESPONSE

FUNCTIONAL RESPONSE

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FUNCTIONAL RESPONSE

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  1. FUNCTIONAL RESPONSE

  2. FUNCTIONAL RESPONSE

  3. FUNCTIONAL RESPONSE

  4. Fig. 7.20 in Molles 2008

  5. Different Light Environments: Terrestrial Adiantum (Maiden Hair Fern) Acer (Sugar Maple)

  6. Contrasting PS Response to Different Light Environments Forest Canopy Plants Forest Understory Plants Fig. 7.21 in Molles 2008

  7. Different Light Environments:Marine (Euphotic and Aphotic Zones) Phytoplankton Chemosynthetic Bacteria

  8. Functional Response Fig. 7.22 in Molles 2008

  9. Prey Density

  10. Food Intake Prey Density

  11. Functional Response: Controlled Experiment Fig. 7.23 in Molles 2008

  12. Functional Response: Natural Environments Fig. 7.24 in Molles 2008

  13. Predatory Water Bug vs. Prey: Isopod Prey: Mayfly Larva

  14. How do Red-Winged Blackbirds Allocate Energy? 1 2 3 4

  15. How do Cacti Allocate Energy? 6 5 9

  16. Optimal Foraging Theory (Derived from Economics) • Energy Supplies are Limited • Organisms cannot maximize all functions • Allocation of Energy is a Compromise between Needs

  17. How do Organisms Select a Diet? Bluegill

  18. MODEL FOR ENERGY YIELD: ONE PREY ITEM Ne1E1 - Cs E = __________________ T 1 + Ne1H1

  19. E T = = Ne1 Cs = H1 =

  20. TWO PREY ITEMS + (Ne2E2 – Cs) (Ne1E1 – Cs) E = _____________________________________________ T 1 + Ne1H1 + Ne2H2

  21. DIET CHOICE: Optimization Ne1E1 - Cs E T = ONE PREY ITEM __________________ 1 + Ne1H1 OR + (Ne2E2 – Cs) (Ne1E1 – Cs) E T TWO PREY ITEMS = _____________________________________________ 1 + Ne1H1 + Ne2H2

  22. ? Bluegill

  23. Actual Food Availability in the Environment Prey Length (mm) Fig. 7.25 in Molles 2008

  24. Bluegill Optimal Diet (Prediction from Theory) Fig. 7.25 in Molles 2008

  25. Bluegill Actual Diet Prey Length (mm) Fig. 7.25 in Molles 2008

  26. Bluegill Diet Optimal Foraging Theory Observed Fig. 7.25 in Molles 2008

  27. Optimal Foraging Theory Applied to Plants Light Level Soil Fertility

  28. Energy Allocation to Roots Fig. 7.26 in Molles 2008

  29. Energy Allocation to Roots Fig. 7.27 in Molles 2008

  30. 1 http://www.coffeecreekwc.org/photos/birds/Red-Winged_Blackbird_(male).jpg 2 http://www.frw.ca/albums/Ponds-and-Wetlands/Projects_Ponds_and_wetlands_ Red_wing_blackbird_nest_in_c.jpg 3 http://www.migrationresearch.org/mbo/id/rwbl/id%20rwbl%20ahy%20f% 20566%20wing%20jul06.jpg 4 http://www.mikephoto.com/content/binary/blackbird-mobbing.jpg 5 http://www.desertusa.com/july96/IMG_0529.jpg 6 http://www.scienceaid.co.uk/biology/ecology/images/cactus.jpg 7 http://www1.istockphoto.com/file_thumbview_approve/3606144/2/istockphoto_ 3606144_saquaro_cactus_skeleton.jpg 8 http://www.azcentral.com/help/reprints/pics/animal_1.jpg