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Coevolution

daniel_millan
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Coevolution

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    1. Coevolution

    2. Coevolution Between plants and animals A relationship develops between two organisms such that, as they interact with each other over time, each exerts a selection pressure on the other. Evolution of each becomes interdependent on that interaction

    3. Coevolution “a reciprocally induced evolutionary change over time between two organisms”

    4. Types of relationships...

    5. Symbiotic relationship Ants and Acacia tress

    6. How is it a mutual relationship? Ants provide tree services too! Attack herbivores, chew up nearby trees so Acacias aren’t in shadows. Tree provides ants- nectar for food, thorns for nest, protein rich Beltian bodies (on leaf tips)

    7. Example #2- Figs and Wasps

    8. Why is it mutually beneficial? Reproductive system of both are tied together. Fig benefits from pollination Wasps benefit by having a food source for larva

    9. Some primate examples Mutualism Seed dispersal Pollination Predation Seed predation Parasitism Strangling fig Polyspecific associations

    10. Plants and Seed Dispersal

    11. Processing technique

    13. Seeds fate? Not get eaten by secondary predator (rats) Buried or in enough feces to germinate Seedling survival (limited- 1 out of 4000 seeds)

    14. Seed properties Should be resistent to chewing Oval shape facilitates swallowing whole Color attractive to primate (bright?) Large to prevent damage

    15. Pollination Morphological adaptations Flower size, color, smell Number of plants visited Flower handling

    16. Morphology Muzzle length Tongue (lemur picture)

    17. Flower morphology

    18. Visits and handling Must visit more than one tree with flowers to transfer pollen Need to handle flowers carefully so don’t destroy reproductive parts.

    20. Parasitism

    25. Once upon a time... In general, a hard relationship to document- a bit of “story” telling Evolutionary Story Telling- the Angiosperm hypothesis (Handout in coursepack)

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