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Group 6: Evolution (aka team Roadkill )

Hard data to swallow : an interrupted case study. Group 6: Evolution (aka team Roadkill ) Kirsten Deane-Coe, Jocelyne Dolce, Thomas Fox, Jan Janecka , Kristina Jones, Brady Porter. Background Information. Intended Course: Introductory Biology for majors or non-majors Unit: Selection.

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Group 6: Evolution (aka team Roadkill )

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  1. Hard data to swallow: an interrupted case study Group 6: Evolution (aka team Roadkill) Kirsten Deane-Coe, Jocelyne Dolce, Thomas Fox, Jan Janecka, Kristina Jones, Brady Porter

  2. Background Information Intended Course: Introductory Biology for majors or non-majors Unit: Selection • Teachable Unit Learning Goals • See selection as an ongoing, visible, and relevant process • Understand how selection works • Resolve misconceptions about selection • Teachable Tidbit Learning Objectives • Interpret scientific data and draw conclusions • Predict the response of a population to selection • Describe adaptation to change in environment

  3. American cliff swallow (Petrochelidonpyrrhonota)

  4. American cliff swallow (Petrochelidonpyrrhonota) • Average life span: 5-8 y • Aerial insectivores • Agile flyers • Build nests on cliffs, increasingly under bridges/overpasses • Behavior: rest on ground, launch into flight for feeding / return to nests

  5. Charles R. Brown and Mary B. Brown (2013) Current Biology

  6. The figure drawn on the board depicts initial results from Brown & Brown (2013) on the number of road-killed swallows found over a 30 year period Turn to your neighbor, and take 2 minutes to: Interpret the data shown Develop at least one hypothesis that would explain this trend

  7. Brown & Brown 2013

  8. Brown & Brown 2013

  9. In your group, take a minute to discuss what, if anything, this histogram tells us Brown & Brown 2013

  10. 1) Copy and label the following set of axes onto the back of the concept map handout: 2) Draw your prediction of wing length of live birds over time if wing length is under selection Wing length of living birds 1983 2012 Time, years

  11. Average wing length of live swallows (mm) Brown & Brown 2013

  12. Final activity / homework: revisit concept map Revisit the concept map the class created last week (handout). The Brown & Brown (2013) study published in Current Biology is provided for your reference. Work with your partner to match the terms on p1 of the the Cliff Swallow Case Study to the concepts in the map.

  13. Concept map: evolution by natural selection A Variation in trait Selection pressure F Differences in survival/reproduction C Heritability of trait Response to selection B E Adaptation

  14. Teachable Tidbit Learning Objectives: • Interpret scientific data and draw conclusions • Describe adaptation to environmental change • Predict the response of a population to selection Group 6: Evolution (aka team Roadkill) Kirsten Deane-Coe, Jocelyne Dolce, Thomas Fox, Jan Janecka, Kristina Jones, Brady Porter

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