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Species Interactions: The Good, the Bad, and the Ugly

Species Interactions: The Good, the Bad, and the Ugly. Types of species interactions. Positive Negative N eutral. Positive species interactions. Mutualism Both species benefit by interacting with each other. Ant-Acacia mutualism. Mutualism. http:// www.australiangeographic.com.au /news/.

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Species Interactions: The Good, the Bad, and the Ugly

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  1. Species Interactions:The Good, the Bad, and the Ugly

  2. Types of species interactions • Positive • Negative • Neutral

  3. Positive species interactions • Mutualism • Both species benefit by interacting with each other Ant-Acacia mutualism

  4. Mutualism http://www.australiangeographic.com.au/news/

  5. Mutualism http://coglab.hbcse.tifr.res.in/teacher-resources/

  6. Mutualism http://mathotter.wordpress.com

  7. Mutualism

  8. Negative species interactions • One species benefits while the other species is harmed http://www-rohan.sdsu.edu

  9. Negative interactions (herbivory) http://en.wikipedia.org/wiki/Herbivore

  10. Negative interactions (competition)

  11. Negative interactions Nectar Robbing Strangler Fig

  12. Neutral species interactions • Commensalism • One species benefits while the other is unaffected

  13. Plant-bacteria-herbivore experiment • Do herbivores prefer plants with rhizobia or plants without rhizobia?

  14. Materials • 10 legume plants (such as beans, peas, clover), in 10 separate pots • Rhizobia (bacteria) inoculant (purchase online) • 20 slugs or other insect herbivores (aphids, beetles, caterpillars) • Old fish tank or large plastic bin, screen or netting to put over top

  15. Instructions • Plant legumes 3 weeks prior to conducting experiment. Inoculate half of the 10 plants with rhizobia bacteria. + rhizobia - rhizobia

  16. Instructions 2. Once plants are mature, put them all into an old fish tank or clear plastic bin and put 2 herbivores on the soil surface in each pot. Make sure pots are close enough to touch. 3. After 1-2 days, estimate the percent of damage to each leaf 4. Record data and analyze results (graphing activity)

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