Chapter 2 Biology
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Chapter 2 Biology

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ecology power point

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Chapter 2 Biology Chapter 2 Biology Presentation Transcript

  • Chapter 2 Ecology
  • Ecology
    • the study of interactions that take place between organisms and their environment
  • Section 2.1 Summary – pages 35 - 45
    • The biosphere is the portion of Earth that supports living things.
    • It extends from high in the atmosphere to the bottom of the oceans.
    The Biosphere
  • Biotic Factors
    • The Living parts of the environment.
    • (giraffe, trees, grass…)
  • Abiotic Factors
    • The Nonliving parts of the environment.
    • (temp., humidity, rocks, water…)
  • Levels of Organization
    • Organism – Species – Population
    • – Community – Ecosystems
  • Species
  • Population
  • Community
  • Niche
    • The role an organism plays in its environment.
    • Rule : No two organisms can occupy the same niche at the same time for very long.
  • Ecosystem
    • Made up of interacting populations in
    • a biological community and the
    • community’s abiotic factors.
    • There are two major kinds of ecosystems— terrestrial ecosystems and aquatic ecosystems.
  • Section 2.1 Summary – pages 35 - 45 Organisms in Ecosystems
    • A habitat is the place where an organism lives out its life.
  • Symbiosis
    • Living Together
    • 3 Types
  • Mutualism
    • Both species Benefit from the relationship.
  • Parasitism
    • One species benefits
    • the other is harmed
  • Commensalism
    • One species benefits
    • The other is not hurt or helped
  • Organisms and Energy
    • All the energy on Earth comes from the sun!!
  • Autotroph
    • Organisms that use the energy from the sun to produce their own food.
    • (producers)
  • Heterotroph
    • Consumes other organisms as food source.
    • 3-Types
            • Herbivores
            • Carnivores
            • Scavengers and decomposers
  • Herbivores
    • Heterotrophs that consume plants only.
    • Ex: cows, deer, rabbits…
    • (First order consumers)
  • Carnivores
    • Heterotrophs that consume other animals.
    • Ex: Humans, cats…
    • (Second… order consumers.)
  • Scavengers
    • Feed on dead organisms.
    • Ex: vultures
  • Decomposers
    • Break down dead plants and animals.
    • Ex: Bacteria and fungus
  • How does energy flow through the ecosystem???
    • In ONE direction only
  • Section 2.2 Summary – pages 46 - 57 Sun-Producers-Consumers-Decomposers- Released as heat Autotrophs First-order heterotrophs Third-order heterotrophs Second-order heterotrophs Decomposers
  • Food Chain
    • Simplest exchange of energy.
  • Food Web: Interconnected, overlapping food chains
  • Food Web
  • Ecological Pyramids
    • Shows how energy flows through the ecosystem
  • Energy Pyramid
    • Shows how energy decreases by 90% at each trophic level.
    • Only 10% of the energy is passed onto the next level.
  • Energy Pyramid
    • Organisms at the bottom of the pyramid are more numerous than at the top.
  • Different Types of Pyramids
  • Nutrients
    • Nutrients cycle through the ecosystem, never disappearing.
    nutrients nutrients nutrients
  • Water Cycle
    • 3 parts…
        • Evaporation
        • Condensation
        • Precipitation
  • Water Cycle
  • Nitrogen Cycle
    • 2 Parts…
      • Nitrification
      • Denitrification
  •  
  • Carbon Cycle