Question

What is ecosystem? Explain the structure of the ecosystem and draw a diagram of trophic levels of ecosystem.

Answer 1

Hint:Trophic level of an organism is the position of that organism in the food web. Food web is the network of food chains. The trophic level of an organism is the number of steps it is from the start of the chain. A food web starts from the trophic level 1 (producers), trophic level 2 (herbivores), trophic level 3 (carnivores), trophic level 4 (top carnivores) and so on.

Complete answer:
Ecosystem : An ecosystem is a geographical area where plants, animals, bacteria and other organisms live together and perform various functions. Ecosystem describes the relation between the biotic (living) and abiotic (non living) components.
Structure of the ecosystem:
Ecosystems consist of the two components. That are-
i) Abiotic components
ii) Biotic components

Abiotic components:-Abiotic components of the ecosystem include basic inorganic elements and compounds such as soil, water, oxygen, phosphates and a variety of organic compounds. Abiotic components also include solar radiations, wind current, moisture, etc.
Biotic components:-The biotic components of the ecosystem include all the living organisms such as plants, animals and microorganisms. On the basis of mode of nutrition the biotic components of the ecosystem can be grouped into three categories. That are-
Producers (Autotrophic components )– The autotrophic components include green algae and plants who can make their own food with the help of the process photosynthesis (a process by which plants make their own food with the help of carbon dioxide, water and sunlight) .
Consumers – Consumers are those living organisms which can not make their own food, they consume the food which is synthesised by the producers. Consumers can be primary consumers (purely herbivores), secondary consumers (carnivores), tertiary consumers (top carnivores).
Decomposers – Decomposers are the living organisms that feed on the dead and decayed organic matter. Decomposers are mainly fungi and bacteria.

Note:Ecosystems are too necessary for all the living beings existing on this Earth. We as humans totally depend on a healthy ecosystem in order to survive or remain healthy. For example – we need pure air in order to breathe, clean water to drink, healthy food to eat that we obtain from the plants, etc.