Advertisements
Advertisements
Question
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?
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
List two biotic components of a biosphere.
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 :
Secondary consumers and tertiary consumers, both are carnivores.
Which of the following belong to the same trophic level?
Goat ; Spider ; Plants ; Hawk ; Rat
Fill in the following blank with suitable word :
Decomposer organisms are..........in their action.
At which trophic level a person is feeding when he is eating roasted chicken.
Construct a long food chain.
Give one example of a simple food chain.
What is a 'food web'? Show its formation.
In a food chain, the third trophic level is always occupied by :
(a) carnivores
(b) herbivores
(c) decomposers
(d) producers
What would happen to the number of grass plants and foxes if the number of rabbits increased?
Will the levels of biological magnification be different at different levels of the ecosystem?
What does garbage consist of?
The harmful chemical which is accumulating in human beings through food chain is :
(a) benzenehexachloride
(b) dichlorodiphenyltrichloroethane
(c) chlorofluorocarbon
(d) abscisic acid
| Human body is made up of five important components, of which water is the main component. Food, as well as potable water, are essential for every human being. The food is obtained from plants through agriculture. Pesticides are being used extensively for a high yield in the fields. These pesticides are absorbed by the plants from the soil along with water and minerals and from the water bodies these pesticides are taken up by the aquatic animals and plants. As these chemicals are not biodegradables, they get accumulated progressively at each trophic level. The maximum concentration of these chemicals gets accumulated in our bodies and greatly affects the health of our mind and body. |
- Why is the maximum concentration of pesticides found in human beings? (1)
- Give one method which could be applied to reduce our intake of pesticides through food to some extent. (1)
- Various steps in a food chain represent: (1)
- Food web
- Trophic level
- Ecosystem
- Biomagnification
- With regard to various food chains operating in an ecosystem, man is a: (1)
- Consumer
- Producer
- Producer and consumer
- Producer and decomposer
Food chains are very important for the survival of most species.
Matter and energy are two fundamental inputs of an ecosystem. Movement of:
Each level in the food chain is called a ______ level.
Why are shorter food chains considered more energy-efficient according to the principle of efficiency?
