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Do Now: Fun Friday!. Homework & Objective. Objective: Examine the impact of species interaction with one another. Homework – Read the Owl Pellet lab write up for Monday. Review the chapter. Plan for a test on chapters 1,2,3,4 on Tuesday (D Period), Wednesday for E Period.

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homework objective
Homework & Objective
  • Objective: Examine the impact of species interaction with one another.
  • Homework –
    • Read the Owl Pellet lab write up for Monday.
    • Review the chapter. Plan for a test on chapters 1,2,3,4 on Tuesday (D Period), Wednesday for E Period.
  • Research Project – Were due Thursday (the written portion) presentations will begin Monday.
species interactions community
Species interactions & Community
    • Competition – Inter Competition & Intra Competition
  • Inter Competition
  • Intra Competition
      • Competitive exclusion
      • Resource partitioning – woodpeckers
      • Predator versus Prey
species interactions community1
Species interactions & Community

Symbiosis – what is it? Are they always good?

  • Mutualism – each benefits
  • Commensalism
    • One benefit and the other is unaffected (Spanish Moss)
  • Parasite - one benefits, the other (most often the host) is harmed
species interactions community2
Species interactions & Community
  • Amensalism– one harmed while the other is unaffected
species interactions community3
Species interactions & Community
  • Turf cutting – Pines trees drop needles which changes the PH and other trees cannot grow there. This is a form of:
            • Allelopathy – plants that release chemicals to protect themselves or their area
species interactions community4
Species interactions & Community
  • Trophic Levels – p. 84 & 85
              • Each rise on the level is a loss of energy (through respiration), only a small amount is transferred
              • Each level is just 10% of energy from the previous level
                • For every hawk there must be more rodents to eat and even more bugs,..
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