Question

(a) Define trophic level. Draw the food chain with four trophic levels.
(b) What will happen if we kill all the organisms in one trophic level?

Answer 1

Answer:

TROPHIC LEVEL

• Trophic level is the any sequential in a food chain.
• Trophic level represent functional role not such as species.
• Trophic level 1 is primary producer (PP).
• Trophic level 2 is called primary consumer.
• Trophic level 3 is called secondary consumer.
• Trophic level 4 is called Top carnivores.
• Energy transfer from one trophic level to other trophic level according to 10% rule.

b) When we kill the all organism in one trophic level then, energy transfer will stop to the next trophic level , disturbs the food chain and may leads to the collapsing of an ecosystem.

Explanation:

FOOD CHAIN

• Food chain is the community of organisms where each member is eaten by another member.
• Generally, food chain have four trophic level.
• Energy flow in food chain is unidirectional (Producers to consumers).
• There are three types of food chain

1. G.F.C / Grazing food chain / Predator food chain.
2. P.F.C / Parasitic food chain / Axillary food chain.
3. D.F.C / Detritus food chain.