What does the pyramid of energy mean?

What does the pyramid of energy mean?

The Pyramid of Energy is a graphical representation that shows energy accumulation patterns at different tropical levels in an ecosystem.

  1. The energy flow moves from the bottom up through the layers of the energy pyramid. The energy is high at the bottom of the pyramid but gradually decreases as the energy is used by the organism at each level.
  2. It is one of three types of ecological pyramids, along with the pyramid of numbers and the pyramid of biomass.
  3.   The pyramid of energy represents the energy flow in the ecosystem. It helps to quantify energy transfer from one organism to another along a food chain.
  4. The number and weight of organisms at any given stage depends on the rate at which food is being produced, not just below a certain amount of energy present at any one time.
  5. The pyramid shape is used because of how energy is used and lost at each tropical level when organisms use it.

What are the examples Pyramid of Energy?

  1. Suppose a deer eats a plant that contains 100 calories of edible energy.
  2. Only 10 calories are stored as food energy because deer use part of it for their metabolism. A lion that eats a deer gets very little energy.
  3. As a result, useful energy decreases as it passes from the sun to the producer, from herbivores to carnivores.
  4. As a result, the energy pyramid will remain upright at all times.

What are the Characteristics of the Pyramid of Energy

  1. How the energy pyramid is constructed is determined by the rate at which food material (in the form of energy) moves through the food chain.
  2. Although some species have low biomass, the energy they use and give off is much higher than organisms with higher biomass.
  3. Energy pyramids are usually skewed because less energy is transmitted through each trophic level than is put into them.
  4. When it comes to open-water ecosystems, for example, producers have less bulk biomass than consumers.
  5. However, the amount of energy saved and passed must be greater than the previous level.

What are the main Levels of an energy pyramid?

 Levels of an energy pyramid

What does the pyramid of energy mean?

Level 1: Producers

  1. Level 1 includes the producers and the energy available within them. They are found at the base of an energy pyramid.
  2. Most producers are autotrophs, organisms that synthesize their food from abiotic substances. Plant regions can manufacture their own food by photosynthesis. Plants and algae are included in level 1.
  3. The chlorophyll pigment is contained inside the chloroplasts in plants and algae. Chlorophyll can absorb light energy.
  4. Some autotrophs do not get their energy directly from the sun, but they get their energy from the soil. Such autotrophs are earthworms and mushrooms.

Level 2: Primary Consumer

  1. The second level includes primary consumers, which are organisms or animals that feed on producers.
  2. The primary consumers are usually herbivores (an animal that feeds on plant material). They depend only on the plant for their survival and nutrition.
  3. Plants get their energy from the sun and then the plants give energy to the primary consumers. It facilitates the transfer of solar energy from one tropical level to another.
  4. Primary consumers have anatomical and physiological characteristics that make them adapted to plant food. For example, they have wide flat teeth for grinding and gut flora (bacteria and protozoans) that help with cellulosic material digestion. Examples of vegetarians are goats, cattle, horses, etc.

Level 3: Secondary Consumers

  1. Secondary consumers are located at the third level of the energy pyramid. Secondary consumers eat primary consumers. They are commonly known as carnivores (animals that eat other animals).
  2. Secondary consumers have anatomical and physiological characteristics that make them adapted to animal feed.
  3.   The carnivorous or secondary consumers are dependent on the primary consumers. Without primary consumers, they would have nothing to eat and therefore would not exist.
  4. At this stage, the energy from producers to primary consumers is now transmitted to secondary consumers. It facilitates the smooth flow of energy for effective utilization.
  5. Examples of secondary consumer animals are foxes, spiders, etc.

Level 4: Tertiary Consumers

  1. Tertiary consumers are included in the last level of the energy pyramid. Tertiary consumers are also known as secondary carnivores which eat both primary and secondary consumers.
  2. At this stage, the energy level of the ecosystem is exhausted.
  3. Typically, energy not used by the plant goes back into the environment, which includes the atmosphere, soil, and water bodies.
  4. It is extremely important that all the different levels of the energy pyramid receive enough energy to keep the earth stable.
  5. Tertiary consumers include leopards, hawks, etc.

What is the Role of decomposers in the pyramid of energy?

  1. Decomposers (which include bacteria, worms, and fungi) play an essential role in the entire pyramid of energy. They break down tissues and organic matter that has not been consumed by the higher organisms in the pyramid. They also use a small amount of energy that resides in the tissue of the dead organism. Decomposers recycle nutrients and minerals back into the soil and help with the carbon cycle and nitrogen cycle.
  2. When decomposers break down tissue and organic matter, the energy released is eventually taken up by plants and used in photosynthesis. This mechanism ensures that energy is being cycled in the ecosystem.

What is the Process of energy transfer through the food chain?

  1. The initial energy is obtained from the sun, and plants produce metabolic energy by photosynthesis, with only 10% of the energy stored in their tissue, meaning that about 10% of the energy is consumed by grazing herbivores. is available. The plant, in its metabolism, uses the remaining solar energy, either lost as heat or lost as waste.
  2. Of the 10% eaten by herbivores, about 10% are stored in their tissue to be fed by carnivores. Herbivores use the remaining 90% of their metabolic energy to do work.
  3. This process continues up to the pyramid, with each subsequent carnivore inheriting only 10% of the previous energy level.
  4. As time passes, about 0.1% of the solar energy that hits the top of the pyramid is consumed by the apex predator, and the rest is lost to metabolic activities.
  5. Decomposers (bacteria, fungi, and insects) obtain small amounts of energy left over in dead plant and animal tissues.
  6. The 10% rule states that “approximately 90% of the energy from food is used for bodily processes or is lost as heat, making 10% of the original energy available to feed the next consumer”.

What is the Importance of the pyramid of energy?

  1. Based on the pyramid of energy, it is possible to characterize the nature of the relationship or interaction between different groups of organisms.
  2. The energy pyramid indicates the introduction of solar energy into the ecosystem by photosynthesis.
  3. The magnitude of energy in different tropical levels of an ecosystem can be compared using the energy pyramid.
  4. The rate and effectiveness of an ecosystem’s output can be assessed using the energy pyramid. It refers to the efficiency of energy transfer.

Limitation of the pyramid of energy

  1. It is still difficult to place organisms into a specific tropic level because of the complexity of their biology.
  2. There is an issue with assigning the decomposer and detritivores to a specific level within the food chain.


Depending on the amount of energy supplied to producers, different percentages of energy are actually delivered to different ecological levels. The pyramid of energy is limited to four or five levels because there is no energy left for the higher organisms in the trophic levels. The notion of the pyramid of energy is important when introducing the concept of biological magnification.


What does the pyramid of energy mean?

Leave a Comment

%d bloggers like this: