The chemical energy of food is the main resource of energy required by all living organisms. This energy istransfer to various trophic levels follow me the food chain. This power flow is based on two different laws the thermodynamics:

First legislation of thermodynamics, that says that power can no be produced nor destroyed, it can only adjust from one form to another.Second legislation of thermodynamics, that claims that as energy is transferred more and an ext of that is wasted.

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The power flow in the ecosystem is just one of the significant factors that support the survival of such a great number that organisms. For nearly all organisms on earth, the primary source of power is solar energy. The is amusing to find that we receive less than 50 every cent of the sun’s effective radiation on earth. Once we say efficient radiation, we mean the radiation, which have the right to be supplied by plants to bring out photosynthesis.

Also Read: Difference between food web and also food chain

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Most of the sun’s radiation that falls on the earth is commonly reflected back into room by the earth’s atmosphere. This efficient radiation is termed together the Photosynthetically active Radiation (PAR).

Overall, we receive around 40 come 50 percent that the energy having Photosynthetically active Radiation and only roughly 2-10 percent of the is used by plants because that the process of photosynthesis. Thus, this percent of PAR supports the entire people as plants room the producers in the ecosystem and all the various other organisms are either directly or indirectly dependent on castle for their survival.

The power flow takes location via the food chain and food web. During the process of energy flow in the ecosystem, plants being the producer absorb sunlight v the help of the chloroplasts and also a component of it is transformed into chemical power in the procedure of photosynthesis.

This energy is save on computer in miscellaneous organic assets in the plants and also passed on come the main consumers in the food chain when the herbivores consume (primary consumers) the plants as food. Climate conversion of chemical energy stored in plant assets into kinetic energy occurs, degradation of power will occur through that conversion right into heat.

Then complied with by the second consumers. When these herbivores room ingested through carnivores that the an initial order (secondary consumers) further deterioration will occur. Finally, as soon as tertiary consumers consume the carnivores, power will again it is in degraded. Thus, the energy flow is unidirectional in nature.

Moreover, in a food chain, the power flow adheres to the 10 percent law. Follow to this law, only 10 percent of power is transferred from one trophic level come the other; remainder is lost right into the atmosphere. This is clearly explained in the adhering to figure and also is represented as an power pyramid.


The producers and consumers in the ecosystem have the right to be arranged into different feeding groups and also are recognized as trophic level or the feeding level.

The producers (plants) stand for the an initial trophic level.Herbivores (primary consumers) existing the 2nd trophic level.Primary carnivores (secondary consumers) stand for the third trophic levelTop carnivores (tertiary consumers) stand for the last level.

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There space basically three different varieties of food chain in the ecosystem, specific –

Grazing food chain (GFC) – This is the common food chain that us observe in which plants are the producers and also the power flows native the producer to the herbivores (primary consumers), climate to carnivores (secondary consumers) and also so on.Saprophytic or Detritus food chain (DFC) – In this kind of food chain, the dead organic issue occupies the lowermost level that the food chain, adhered to by the decomposers and also so on.Parasitic food chain (PFC) – In this form of food chain, huge organisms one of two people the producer or the customer is exploited and therefore the food passes to the smaller sized organism.

In nature, we greatly observe food web as there are many organisms which room omnivores. As a result, they accounting multiple trophic levels.

Also Read: Ecosystem

This was a short idea around the energy flow in the ecosystem. For an ext information on power flow, store visiting BYJU’S website or download BYJU’S app for further reference.
The power flow is the quantity of power that moves follow me the food chain. This energy flow is also known as calorific flow.


The energy flow in the ecosystem is necessary to preserve an environmental balance. The producers synthesise food by the process of photosynthesis. A component of the energy is stored in ~ the plants. The remaining energy is utilised by the tree in your growth and also development. This stored energy is transferred to the major consumers once they feed on the producers. This energy is more passed on come the second consumers when they feed on the main consumers, and also so on.

See more: How Much Does The Average Dairy Cow Weigh T Of Cow, Weight Of Cow


The 10 percent law of energy flow says that when the energy is pass on indigenous one trophic level to another, just 10 percent the the power is passed on to the following trophic level.