Question 6: Given below is a list of autotrophs and heterotrophs. With your knowledge about food chain, establish various linkages between the organisms on the principle of ‘eating and being eaten’. What is this inter-linkage established known as?
Algae, hydrilla, grasshopper, rat, squirrel, crow, maize plant, deer, rabbit, lizard, wolf, snake, peacock, phytoplankton, crustaceans, whale, tiger,
lion, sparrow, duck, crane, cockroach, spider, toad, fish, leopard, elephant, goat, Nymphaea, Spirogyra.
Answer:
The complicated network of the food chains which are interconnected at the different trophic levels to form a number of feeding connections is known as food web. Food webs provide the pattern of basic ecological interactions among the species and the trophic levels. They consume producer, primary consumer/ carnivores and so on levels which are interconnected with each other. Some names are given in question in which some are producers, herbivores and others are carnivores and top carnivores.
Producers (first trophic level): Algae, Hydrilla, Maize Plant, Phytoplanktons, Nymphaea, Spirogyra.
Primary carnivores/ primary consumers (second trophic level): Grasshopper, Crustaceans, deer, rat, squirrel, rabbit, elephant, Goat, ducks.
Secondary carnivores/ secondary consumers (third trophic level): Spider, cockroach, lizard, wolf, snake, toad, fish, crane, predatory birds like crow or sparrow, whale, peacock.
Tertiary carnivores/ tertiary consumers (fourth trophic level): Lion, tiger.
Diagram of food web:
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