energy flow through an ecosystem
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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. Photosynthesis

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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
Photosynthesis
  • Chemical reaction where green plants usewater & carbon dioxide to store the sun’s energy in glucose
  • ENERGY is stored in glucose
  • Glucose is stored as starch in plants
cellular respiration is the chemical reaction that releases the energy in glucose

CELLULAR RESPIRATION is the chemical reaction that releases the energy in glucose.

6O2 + C6H12O6 -->  6H2O + 6CO2 + energy

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 (1st) or primary consumers
  • Are herbivores (plant-eaters)
slide13

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

a consumer that eats another consumer for energy
A Consumer that Eats Another Consumer for Energy:
  • Is called a secondary or 2nd order consumer
  • May be a carnivore or a 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.

a consumer that eats a consumer that already ate a consumer
A consumer that eats a consumer that already ate a consumer:
  • 3rd order or tertiary consumer
    • carnivore
    • omnivore
    • predator
    • scavenger
    • detritivore
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
Detritivores
  • -Organisms that obtain their energy from organic wastes and dead bodies
slide22

The transfer of energy from the sun to producer to primary consumer then to higher order consumers can be shown in a FOOD CHAIN.

energy pyramids show
Energy Pyramids Show
  • Amount of available energy decreases for higher consumers
  • 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
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