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Energy Flow Through an Ecosystem. Food Chains, Food Webs, Energy Pyramids. Begins with the SUN Photosynthesis. 6CO 2 + 6H 2 O + sunlight & chlorophyll  C6H 12 O 6 + 6O 2. The chemical reaction by which green plants use water and carbon dioxide and light from the sun to make glucose.

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energy flow through an ecosystem

Energy Flow Through an Ecosystem

Food Chains, Food Webs, Energy Pyramids

slide2

Begins with the SUN

  • Photosynthesis

6CO2 + 6H2O + sunlight & chlorophyll C6H12O6 + 6O2

slide3
The chemical reaction by which green plants use water and carbon dioxide and light from the sun to make glucose.
  • ENERGY is stored in glucose; glucose is stored as starch.
slide8

The energy that is not used by producers can be passed on to organisms that cannot make their own energy.

consumers that eat producers to get energy
Consumers that eat producers to get energy:
  • Are first order or primary consumers
  • Ex. herbivores (plant-eaters)
slide13

Some energy in the primary consumer is not lost to the atmosphere or used by the consumer itself.This energy is available for another consumer.

a consumer that eats another consumer for energy
A consumer that eats another consumer for energy:
  • Is called a secondary or second order consumer
  • May be a carnivore
  • May be an omnivore
  • May be a predator
  • May be a scavenger
slide15

Most of the energy the secondary consumer gets from the primary consumer is used by the secondary consumer.

slide16

Some of the energy is lost as heat, but some energy is stored and can be passed on to another consumer.

a consumer that eats a secondary consumer
A consumer that eats a secondary consumer:
  • Is called a third order or tertiary consumer
  • May be a carnivore
  • May be an omnivore
  • May be a predator
  • May be a scavenger
consumers that eat producers other consumers
Consumers that eat producers & other consumers
  • Are called omnivores
  • Omnivores eat plants and animals
slide19
Consumers that hunt & kill other consumers are called predators.The animals that are hunted & killed are called prey.
slide21

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 pyramids show
Energy 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
food webs
Food Webs:
  • Are interconnected food chains
  • They show the feeding relationships in an ecosystem