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प्रश्न
What will happen if we kill all the organisms in one trophic level?
उत्तर १
If we kill all the organisms at one trophic level, it will create an imbalance in the ecosystem. For example, in a food chain, Grass → Deer → Lion, if we remove all lions, then the population of deer will increase, which will cause overgrazing. This will lead to deforestation. It may even lead to soil erosion, causing the further conversion of fertile land into barren deserts.
उत्तर २
If we kill all the organisms in one trophic level, the transfer of food energy to the next trophic level will stop. This will cause a break in the food chain, resulting in an imbalance in the ecosystem. As a result, the organisms of the higher trophic level will also die, while the individuals of the lower trophic level will exhibit enormous growth in their population. Both conditions will result in an ecological upset.
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संबंधित प्रश्न
What will be the amount of energy available to the organisms of the 2nd trophic level of a food chain if the energy available at the first trophic level is 10,000 joules?
Will the impact of removing all the organisms in a trophic level be different for different trophic levels? Can the organisms of any trophic level be removed without causing any damage to the ecosystem?
What is biological magnification?
What name has been given to those organisms which break down the complex organic compounds present in dead animals and plants?
Which of the following belong to the same trophic level?
Goat ; Spider ; Plants ; Hawk ; Rat
Name the organisms belonging to the second and the fourth trophic levels in the food chain comprising the following :
Frogs, Plants, Snakes, Hawk, Insects
A student went to study a local pond. In one part of the pond she noticed tadpoles scraping at some pond weed. In another part she saw a water beetle holding a tadpole in its jaws.
(a) Construct a food chain for the pond.
(b) How many links are there in this chain?
Give two differences between food chain and food web.
Organisms which synthesise carbohydrates from inorganic compounds by using radiant energy are called ______.
One of the following is not a consumer. This one is :
(a) giraffe
(b) antelope
(c) algae
(d) alligator
Which of the following is not a producer?
(a) grass
(b) zooplankton
(c) phytoplankton
(d) paddy
What would happen to the number of rabbits and grass plants if the number of foxes decreased?
What would happen to the number of grass plants and foxes if the number of rabbits decreased?
Fill in the following blank with suitable word :
Pesticides enter the food chain at the ...........level
Will the levels of biological magnification be different at different levels of the ecosystem?
A food chain consists of fish, larvae, phytoplanktons and birds. The level of pesticides in water in which the fish, larvae and phytoplanktons live is quite high.
(a) In which organisms the pesticides enter from the polluted water? What is this level of organisms known as?
The process of accumulation of harmful chemical substances like pesticides, in the body of living organisms at each trophic level of a food chain is known as ______.
A food chain comprising birds, green plants, fish and man. The concentration of harmful chemical entering the food chain will be maximum in ______.
Each level in the food chain is called a ______ level.
DDT was sprayed in a lake to regulate breeding of mosquitoes. How would it affect the trophic levels in the following food chain associated with a lake? Justify your answer.
