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Agenda 5/10

Agenda 5/10. Review of Food Webs Niche notes Practice probs Grades back (remind me at 10-till end). Learning Target #2. 2) I can explain what a niche is and why ecological relationships are important. CH 15 Notes 2. Niche: An organism’s role in an community.

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Agenda 5/10

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  1. Agenda 5/10 • Review of Food Webs • Niche notes • Practice probs • Grades back (remind me at 10-till end)

  2. Learning Target #2 2) I can explain what a niche is and why ecological relationships are important

  3. CH 15 Notes 2

  4. Niche: An organism’s role in an community • An organism’s niche includes: What it eats , where it lives, how it interacts with other organisms • Another way to think about it: niche = organism’s “job” in its ecosystem

  5. Habitat: The place a species livesExample: Ant hill

  6. Ecological relationships: Ways organisms interact with each other

  7. Different types of ecological relationships 1. Predation: relationship where one animal hunts, kills, and eats the other • Prey: an organism that gets hunted, killed & eaten • Predator: an organism that hunts, kills and eats the other

  8. 2. Scavenging: animals feeding off of other dead animals Example: Vultures are scavengers that eat road kill

  9. 3. Competition: relationship where two organisms compete over resources • Two organisms do not want to have the same niche. • If they do, then they compete forresources (space, food, mates)

  10. 4. Symbiotic relationships: Two organisms of different species closely interact a. Mutualism: Both organisms benefit • Example: bees pollinate flower and get to drink nectar

  11. b. Commensalism: One organism benefits, the other is not affected • Example: Bird eats insects that an ox disturbs, the ox isn’t helped or hurt

  12. c. Parasitism: One organism benefits, the other gets harmed • Parasite: an organism that lives on/in another organism and gets its food from them • Host: The organism a parasite lives on/in and feeds from

  13. Why ecological relationships matter: • If an organism gets removed or added to the food chain, it affects all the organisms in the chain! • This would be like taking a person out of his/her job OR adding in a new person http://www.ecokids.ca/pub/eco_info/topics/frogs/chain_reaction/play_chainreaction.cfm http://www.youtube.com/watch?v=D1aRSeT-mQE

  14. This disrupts the flow of energy from the sun to the organisms

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