Ecosystem–What are its Components?
Ecosystem–What are its Components?: Overview
This topic describes the types of ecosystems. It discusses the components of the ecosystem by explaining the three types of organisms such as producers, consumers and decomposers in the biotic component.
Important Questions on Ecosystem–What are its Components?
Hawks in an ecosystem are
The only lake in a small village was dried up and used as a construction ground for a hospital and community buildings. That year the number of patients suffering from malaria increased in the village. What could be the reason behind it? Explain with the help of a food chain.
What is ? in the following flow chart of the food chain?
What will happen if predators are removed from the food chain?
"Energy flow in a food chain is unidirectional”. Justify this statement. Explain how the pesticides enter a food chain and subsequently get into our body?
What is meant by food chains? ” The number of trophic levels in a food chain is limited”. Give a reason to justify this statement.
Explain the phenomenon of ”biological magnification". How does it affect organisms belonging to different trophic levels, particularly the tertiary consumers?
Why bacteria and fungi are called decomposers? List any two advantages of decomposers to the environment.
Observe the food chain:
(a) If autotrophs occupying the first trophic level are called producers, what are herbivores called as?
(b) How much energy does the lion get in the above food chain?
List two reasons to show that the existence of decomposers is essential in ecosystem.
What are decomposers? List two important roles they play in the environment.
“The maximum concentration of harmful chemicals accumulates in human beings"? State the phenomenon involved and justify this statement.
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In this food chain which organisms will have (i) Maximum available energy, (ii) Maximum concentration of pesticides.
Construct an aquatic chain showing four trophic levels.
A geographical area contains organisms like snake, grasshopper, peacock, grass, and frog. If pesticides were used in this area to kill insects, which among the organisms will have the maximum amount of pesticide. Name the phenomenon involved.
Identify producers from the following: Frog, Blue-green algae, Grasshopper, Fish, Grass.
In a certain study conducted on the occurrence of DDT along food chains in an ecosystem, the concentration of DDT in the grass was found to be 0.5 ppm. ln sheep, it was 2 ppm and in man, it was 10 ppm. Why was the concentration of DDT maximum in the case of man?
In a food chain comprising frogs, insects, birds and grass, which one of the organisms is likely to have maximum concentration of harmful non-biodegradable chemicals in the body.
Explain “biological magnification” with the help of an example.
Define Biomass.
