Question:

The first trophic level in an ecosystem consists of

Updated On: Aug 15, 2022
  • Primary producers
  • Primary consumers
  • Secondary producers
  • Secondary consumers
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The Correct Option is A

Solution and Explanation

Trophic level is the specific place occupied by an organism in a food chain on the basis of its source of nutrition or food. Primary producers (green plants) belong to the first trophic level, they prepare the food by photosynthesis by utilising radiant energy of sun. Plant eating herbivores (e.g., cow, grasshopper) are primary consumers and occupy second trophic level. Secondary consumers are carnivores (e.g., frogs, lizards) which feed on herbivores and occupy third trophic level in a food chain. Tertiary consumers or top carnivores (e.g., lion, man) feeding on secondary consumers are present at next higher trophic level.
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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.