Answer:

Ecological efficiency can be calculated using the formula NPP (Net Primary Productivity)/GPP (Gross Primary Productivity)*100. Let's understand the meaning of each term and how they are related to ecological efficiency.

Gross Primary Productivity (GPP)
GPP is the amount of energy that plants capture and store as organic compounds through photosynthesis. It is the total amount of energy produced by plants in a given area or ecosystem.

Net Primary Productivity (NPP)
NPP is the energy that is left after plants have used some of the energy produced through photosynthesis for their own growth and maintenance. It is the energy that is available to consumers in the ecosystem. NPP is the difference between GPP and plant respiration.

Ecological Efficiency
Ecological efficiency is the percentage of energy transferred from one trophic level to the next. It is the efficiency with which energy is transferred from one organism to another in an ecosystem.

Calculation of Ecological Efficiency
Ecological efficiency can be calculated using the formula NPP/GPP*100. The higher the ecological efficiency, the more efficient the energy transfer is between trophic levels.

Significance of Ecological Efficiency
Ecological efficiency is an important concept in ecology as it helps us understand the energy flow in an ecosystem. It tells us how much energy is transferred from one trophic level to another and how much energy is lost as heat during the transfer. Ecological efficiency also helps us understand the structure and dynamics of the ecosystem and the impact of human activities on the ecosystem.

In conclusion, ecological efficiency is the percentage of energy transferred from one trophic level to the next and is calculated using the formula NPP/GPP*100. It is an important concept in ecology as it helps us understand the energy flow in an ecosystem and the impact of human activities on the ecosystem.