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प्रश्न
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?
उत्तर
Yes. Depending on the trophic level, various organisms will be affected differently if all of them are eliminated. For instance, eliminating all of the producers (T1) will negatively impact both herbivores and carnivores as well as all other consumer types, whereas eliminating all of the herbivores will negatively impact only the carnivores while increasing the number of producers.
No. The removal of any organism at any trophic level will always have a negative impact on the ecosystem. For example, eliminating tigers and lions, two of the top carnivores will quickly increase the number of deer, which will then quickly consume the available vegetation, leading to a shortage of vegetation and a deer population crash.
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संबंधित प्रश्न
What are trophic levels? Give an example of a food chain and state the different trophic levels in it.
What will happen if we kill all the organisms in one trophic level?
In the following food chain, 100 J of energy is available to the lion. How much energy was available to the producer?
Plants → Deer → Lion
The following statement is true or false :
In biology, human beings are called producers.
Define decomposers.
Give an example of a four step food chain operating in grassland. Name the secondary consumer in this food chain
Consider the food chain :
Grass → Deer → Lion
What will happen if all the lions are removed from the above food chain?
Write down a food chain which ends with humans.
Write down a food chain with five links in it.
Write one or two word for the following statement/definition :
Each level of food chain where transfer of energy takes place
Which of the following are decomposers of dead organisms?
| Bacteria | Fungi | Viruses |
| (a) no | yes | yes |
| (b) yes | no | yes |
| (c) yes | yes | no |
| (d) yes | yes | yes |
In a food chain, the third trophic level is always occupied by :
(a) carnivores
(b) herbivores
(c) decomposers
(d) producers
Organisms of a higher trophic level which feed on several types of organisms belonging to a number of lower trophic levels constitute the ______.
The sea water contains water beetles, tadpole, fish and weeds.
Which organisms can trap solar energy to make food?
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?
"Energy flow in food chains is always unidirectional". Justify this statement. Explain how the pesticides enter a food chain and subsequently get into our body.
We should reduce the use of the plastic bags, bottles etc. because ______.
In the given food chain, suppose the amount of energy at the fourth trophic level is 5 kJ, what will be the energy available at the producer level?
Grass → Grasshopper → Frog → Snake → Hawk
Which group of organisms are not constituents of a food chain?
- Grass, lion, rabbit, wolf
- Plankton, man, fish, grasshopper
- Wolf, grass, snake, tiger
- Frog, snake, eagle, grass, grasshopper
