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Food chain and Food Web

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Food chain and Food Web

  1. 1. FOOD CHAIN The sequence of the eaters being eaten is called food chain OR The transfer of food energy from producers, through a series of organisms (herbivores to carnivores to decomposers ) with repeated eating and being eaten, is known as a food chain
  2. 2. Plant Insects Fish Frog Bear People FOODCHAIN
  3. 3. PRODUCERS HERBIVOURS CARNIVORES
  4. 4. PRODUCERS The organisms which carry out photosynthesis constitute the producers of an ecosystem. E.g. Plants , algae and bacteria CONSUMER Consumers are organisms which eat other organisms. All animals are consumer. DECOMPOSERS The decomposers are organisms that break up the dead bodies of plants and their waste products. The decomposers are fungi and certain bacteria.
  5. 5. FOOD CHAIN TROPIC LEVEL The various steps in a food chain is called TROPIC LEVEL ENERGY FLOW The energy is transferred from one trophic level to another trophic level is called energy flow.
  6. 6. Green heron Algae (small green Plants ) Water fleas Guppy (small fish) Bass (large fish)
  7. 7. GRAZING FOODCHAIN MAN
  8. 8. In predator food chain ,one animal capture and devours another animal . The animal which is eaten is called PRAY. Some omnivores and carnivores are also pray to other animals.
  9. 9. The animals which eats other animals is called PREDATOR
  10. 10. The plants and animals of the grazing food chain are infected by parasites. The parasites derive their energy form their hosts. Thus the parasitic chain is formed within the grazing food chain FOOD CHAINN IN A GRASS LAND
  11. 11. Certain groups of organisms which feed exclusively on the dead bodies of animals and plants. These organisms are called DETRITIVOURES. The detritivoures include algae , bacteria, fungi, protozoan, insects, millipedes, centipedes ,etc . Some amount of energy trapped and the reminded is excreted in the from of simple organic compounds.
  12. 12. These are again used by another set of detritivores until the organic compounds are converted into CO2 and water. DEAD ORGANIC MATTER DETRITIVOURES CO2+ H2O
  13. 13. The various food chain are interconnected with each other to form a network called food web OR The interlocking of many food chain is called food web
  14. 14. Simple food chain are very rare in nature. This is be cause each organisms may obtain food from more than one trophic level . FALLEN LEAVES LIVING LEAVES GRASS SEEDS SNAILS WOODLICE WORMS RATS MICE SQUIRRELS HAWK STARLING OWL TERTIARY CONSUMER SECONDARY CONSUMER PRIMARY CONSUMER PRODUCER

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