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Ecosystems and You




     Ms. Thao Le
Energy Flow Through An Ecosystem
Learning Goals:
• Explain how energy flows through an
  ecosystem
• Describe how energy flow can be represented
  in an ecosystem
• Identify the key actors that contribute to
  energy flow in an ecosystem
• Explain the importance of nutrient cycling
Energy Flow Through An Ecosystem
• What do you already know?
• Who are the key players in an ecosystem
• How is energy flow represented in an
  ecosystem?
1. Food Chain + Nutrient Cycle
2. Food Pyramid + Nutrient Cycle
Ecosystem
What is an ecosystem?
Ecosystem
              Climate




Animals                   Soil




             Vegetation
Ecosystem
• An ecological
  community consisting of
  plants and animals living
  together in a particular
  environment.
• They depend on each
  other and the non-living
  parts of their
  environment such as
  rocks, soil, water,
  sunlight, and
  temperature.
Energy
How does energy flow through an ecosystem?
http://www.globalchange.umich.edu/globalchange1/current/lectures/kling/ecosystem/zebra2.gif
Energy Flow Through An Ecosystem
• Sun
• Consumers
1. Primary
2. Secondary
3. Tertiary
• Decomposers +
   Nutrient Cycling
Energy Flow Through An Ecosystem
• Starts with the Sun (Our largest
  energy source on Earth!)
• Photosynthesis-The chemical
  reaction by which green plants
  use water, carbon dioxide and
  light from the sun to make
  glucose.
• ENERGY is stored in glucose;
  glucose is stored as starch.
Energy Cycle
Energy Flow Through An Ecosystem
• Organisms that can make
  their own (energy) in the
  form of glucose are called
  Producers.
• Examples: Plants, Algae
• The energy that is unused
  by producers are passed on
  to organisms that cannot
  make their own energy
  called Consumers.
• Examples: Fish, Dog, Cat,
  Tiger, You
Energy Flow Through An Ecosystem
Types of Consumers:
• Primary Consumer- 1st Order, ex: Herbivores=
  Plant eaters
• Secondary Consumer-2nd Order, Consumers to
  eat another consumer, ex: Herbivores,
  Carnivores=Meat eaters
• Tertiary Consumer-3rd Order, A consumer that
  eats a consumer that already ate a consumer
• Scavengers + Decomposers-Getting read of dead
  stuff, returning energy into nutrient form
Energy Flow Through An Ecosystem
• Most of the energy
  the primary
  consumer gets from
  the producer is used
  by the consumer.
Energy Flow Through An Ecosystem
Energy Flow Through An Ecosystem
Energy Flow Through An Ecosystem
Energy Flow Through An Ecosystem
• Scavengers-they eat dead
  stuff. Ex: Vultures
• Decomposers-they breakdown
  what the scavengers eat to
  return the energy back into
  the soil where plants can use
  it. Ex: Worms, Insects, Bacteria
• Nutrient Cycling :(C, O, H, N,
  P). Ex: Worms using nutrients
  (minerals) in soil or Algae
  using Phosphorus in a body of
  water.
Energy Flow Through An Ecosystem
Energy Flow Through An Ecosystem
Energy Flow Through An Ecosystem
Energy Flow Through An Ecosystem
• Energy is not recycled; it is constantly being
  supplied by the Sun.
• Energy is lost in the form feces, tissue loss,
  and death which releases heat.
• Nutrients are recycled as there is only a
  limited supply.
Energy Flow Through An Ecosystem
• The transfer of energy
  from sun to producer
  to primary consumer
  to secondary
  consumer to tertiary
  consumer can be
  shown in a FOOD
  CHAIN.
Energy Flow Through An Ecosystem
• Another way of
  showing the transfer
  of energy in an
  ecosystem is the
  ENERGY PYRAMID.
Energy Flow Through An Ecosystem
Food Pyramids Show:
• That the amount of
  available energy decreases
  down the food chain
• It takes a large number of
  producers to support a
  small number of primary
  consumers
• It takes a large number of
  primary consumers to
  support a small number of
  secondary consumers
Energy Flow Through An Ecosystem
Help me classify which role these organisms in
  the videos represent in a food chain:
• http://www.youtube.com/watch?feature=play
  er_embedded&v=HN9j0y9bivo
• http://www.youtube.com/watch?feature=play
  er_embedded&v=xFQ_fO2D7f0
Energy Flow Through An Ecosystem

• What is an ecosystem?
• How does energy flow through an ecosystem?
• Describe how the transfer of energy can
  berepresented? (Hint: We reviewed 2 types.)
• Identify the key players in an ecosystem.
• Why is nutrient cycling important?
Energy Flow Through An Ecosystem

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Energy Flow In An Ecosystem

  • 1. Ecosystems and You Ms. Thao Le
  • 2. Energy Flow Through An Ecosystem Learning Goals: • Explain how energy flows through an ecosystem • Describe how energy flow can be represented in an ecosystem • Identify the key actors that contribute to energy flow in an ecosystem • Explain the importance of nutrient cycling
  • 3. Energy Flow Through An Ecosystem • What do you already know? • Who are the key players in an ecosystem • How is energy flow represented in an ecosystem? 1. Food Chain + Nutrient Cycle 2. Food Pyramid + Nutrient Cycle
  • 4. Ecosystem What is an ecosystem?
  • 5. Ecosystem Climate Animals Soil Vegetation
  • 6. Ecosystem • An ecological community consisting of plants and animals living together in a particular environment. • They depend on each other and the non-living parts of their environment such as rocks, soil, water, sunlight, and temperature.
  • 7. Energy How does energy flow through an ecosystem?
  • 9. Energy Flow Through An Ecosystem • Sun • Consumers 1. Primary 2. Secondary 3. Tertiary • Decomposers + Nutrient Cycling
  • 10. Energy Flow Through An Ecosystem • Starts with the Sun (Our largest energy source on Earth!) • Photosynthesis-The chemical reaction by which green plants use water, carbon dioxide and light from the sun to make glucose. • ENERGY is stored in glucose; glucose is stored as starch.
  • 12. Energy Flow Through An Ecosystem • Organisms that can make their own (energy) in the form of glucose are called Producers. • Examples: Plants, Algae • The energy that is unused by producers are passed on to organisms that cannot make their own energy called Consumers. • Examples: Fish, Dog, Cat, Tiger, You
  • 13. Energy Flow Through An Ecosystem Types of Consumers: • Primary Consumer- 1st Order, ex: Herbivores= Plant eaters • Secondary Consumer-2nd Order, Consumers to eat another consumer, ex: Herbivores, Carnivores=Meat eaters • Tertiary Consumer-3rd Order, A consumer that eats a consumer that already ate a consumer • Scavengers + Decomposers-Getting read of dead stuff, returning energy into nutrient form
  • 14. Energy Flow Through An Ecosystem • Most of the energy the primary consumer gets from the producer is used by the consumer.
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  • 18. Energy Flow Through An Ecosystem • Scavengers-they eat dead stuff. Ex: Vultures • Decomposers-they breakdown what the scavengers eat to return the energy back into the soil where plants can use it. Ex: Worms, Insects, Bacteria • Nutrient Cycling :(C, O, H, N, P). Ex: Worms using nutrients (minerals) in soil or Algae using Phosphorus in a body of water.
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  • 22. Energy Flow Through An Ecosystem • Energy is not recycled; it is constantly being supplied by the Sun. • Energy is lost in the form feces, tissue loss, and death which releases heat. • Nutrients are recycled as there is only a limited supply.
  • 23. Energy Flow Through An Ecosystem • The transfer of energy from sun to producer to primary consumer to secondary consumer to tertiary consumer can be shown in a FOOD CHAIN.
  • 24. Energy Flow Through An Ecosystem • Another way of showing the transfer of energy in an ecosystem is the ENERGY PYRAMID.
  • 25. Energy Flow Through An Ecosystem Food Pyramids Show: • That the amount of available energy decreases down the food chain • It takes a large number of producers to support a small number of primary consumers • It takes a large number of primary consumers to support a small number of secondary consumers
  • 26. Energy Flow Through An Ecosystem Help me classify which role these organisms in the videos represent in a food chain: • http://www.youtube.com/watch?feature=play er_embedded&v=HN9j0y9bivo • http://www.youtube.com/watch?feature=play er_embedded&v=xFQ_fO2D7f0
  • 27. Energy Flow Through An Ecosystem • What is an ecosystem? • How does energy flow through an ecosystem? • Describe how the transfer of energy can berepresented? (Hint: We reviewed 2 types.) • Identify the key players in an ecosystem. • Why is nutrient cycling important?
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Notas do Editor

  1. SB4. Students will assess the dependence of all organisms on one another and the flow ofenergy and matter within their ecosystems.b. Explain the flow of matter and energy through ecosystems by Arranging components of a food chain according to energy flow. Comparing the quantity of energy in the steps of an energy pyramid. Explaining the need for cycling of major nutrients (C, O, H, N, P).
  2. Primary consumer, herbivore
  3. Secondary Consumer, snake eating a frog
  4. Tertiary Consumer, hawk eating a snake that consumed a frog..
  5. Decomposer-who ami?
  6. Decomposer-who am i?
  7. Ask how many snakes must the hawk consume? Questions like that. Will propose more.