a) Distinguish between primary productivity and secondary productivity of an ecosystem.
b) Define food web.

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Solution

Primary productivity Secondary productivity
This is the production of the organic matter by the producers. This is the production of the organic matter by the consumers.
The energy is obtained from the sunlight and food is produced. The energy is obtained by the transfer of the energy through food chain.
The process of production is fast. The process of production is quite slow.
b) The food web is the network of organisms which are connected to each other for food and energy. There are many food chains which are interconnected with each other for the transfer of food.

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Similar questions

Distinguish between:

(a) Grazing food chain and detritus food chain

(b) Production and decomposition

(d) Food chain and food web

(e) Litter and detritus

(f) Primary and secondary productivity

Column I	Column II
A. Gross primary productivity	(i) Green plants
B. Secondary productivity	(ii) Rate of synthesis of organic matter by consumers
C. Transducers	(iii) Total organic matter produced from solar energy
D. Food web	(iv) Interconnection of food chains

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Primary productivity	Secondary productivity
This is the production of the organic matter by the producers.	This is the production of the organic matter by the consumers.
The energy is obtained from the sunlight and food is produced.	The energy is obtained by the transfer of the energy through food chain.
The process of production is fast.	The process of production is quite slow.