Question

Name a physical quantity which circulates through the ecosystem. Mention its direction in an ecosystem in terms of trophic levels. which trophic level will possess largest amount of this quantity?

Answer 1

Energy flow is always unidirectional starting from producers.According to 10% law producers have maximum amount of energy.

Answer 2

A physical quantity that circulates through the ecosystem is ENERGY.

It flows UNIDECTIONALLY amongst trophic levels.

The trophic level will possess largest amount of this quantity will be PRODUCERS.

Trophic Level - It is a pyramid or arrangement of organisms on the basis of different parameters like biomass, energy, etc.

Pyramid of Energy:

• It is the organisation of organisms in the order of amount of energy they gain.
• Energy transferred is governed by "Lindman's law of energy transfer".
• Primary producers devour only 1% of sunlight energy.
• Organisms at other trophic levels consume 10% energy.

Since energy is lost at each tropic level, the pyramid of energy is always UPRIGHT.