Question:

Which of the following is expected to have the highest value (gm/m2/yr) in a grassland ecosystem

Updated On: Jul 11, 2024
  • Tertiary production
  • Gross production (GP)
  • Net production (NP) 
  • Secondary production
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The Correct Option is B

Solution and Explanation

Gross primary productivity, or GPP, represents the speed at which producers synthesize organic matter within a specific area over a given time. The portion of this productivity that remains available for heterotrophs is termed net primary productivity, or NPP. NPP serves as a measure of the energy or biomass that remains after producers have covered their respiration and maintenance costs. Secondary productivity, on the other hand, signifies the rate at which new biomass is generated by heterotrophic organisms or consumers. In a grassland ecosystem, GPP is likely to be at its highest because abundant grass, as the primary producers, incurs relatively low expenses in terms of respiration and metabolic needs.
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Concepts Used:

Ecosystem

An ecosystem is a structural and functional unit of ecology where the living organisms come in to interact with each other and the surrounding environment.

Structure of the Ecosystem:

The structure of an ecosystem is distinguished by the organization of both biotic and abiotic components. This involves the distribution of energy in our environment. It also comprises the climatic conditions prevailing in that particular environment. 

There are two main components of the structure of an ecosystem, namely: 

  • Biotic Components
  • Abiotic Components

The biotic and abiotic components are interconnected in an ecosystem. It is an open system where the energy and components can flow through the boundaries.