Ecological Pyramid | CBSE | HINDI

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Ecological pyramid
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What is a pyramid ?
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What is ecological pyramid ?
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Primary producers

• Primary producers convert an abiotic source of
  energy (e.g. light) into energy stored in organic
  compounds, which can be used by other organisms
  (e.g. heterotrophs)
• The primary producers can convert the energy in
  the light (phototroph and photoautotroph) or the
  energy in inorganic chemical compounds
  (chemolithotrophs) to build organic molecules,
  which is usually accumulated in the form
  of biomass and will be used as carbon and energy
  source by other organisms
• level 1 on Pyramid.

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examples
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Primary consumers

• A primary consumer is an organism that feeds on
  primary producers.
• Primary consumers are those members of a food
  chain that eat producers or plants.
•  Primary consumers are always herbivores, or
  organisms that only eat autotrophic plants
• Level 2 on Pyramid.

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Examples
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Secondary consumers

• Secondary consumers are organisms that eat
  primary consumers for energy.
• Secondary Consumers are always Carnivorous.
• Level 3 on Pyramid.

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examples
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Tertiary consumers/ apex predators

• A tertiary consumer is an animal that obtains its
  nutrition by eating primary consumers and
  secondary consumers
• Usually tertiary consumers are carnivorous
  predators, although they may also be omnivores,
  which are animals that feed on both meat and
  plant material
• Level 4 on Pyramid.

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examples
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decomposers

• An organism, especially a soil bacterium, fungus,
  or invertebrate, that decomposes organic material.