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2.1.2 Principles and concepts
2.1.2 Principles and concepts
The characteristic features of an ecosystem are the flow of energy, the food supply and the production of all biological resources to drive the ecosystem. Light energy from the sun is captured by green plants and converted to chemical energy. Organisms use and convert this chemical energy for growth and life activities through food chain. A food chain is a succession of organisms in a community that constitutes a feeding sequence in which food energy is transferred from one organism to the other. At the bottom of the chain is a photosynthesizing plant, followed by an herbivore, a successions of carnivores, and finally decomposers. At each step, some of the chemical energy is assimilated and used by the organism and the rest is released in respiration and waste products in an ecosystem.
The characteristic features of an ecosystem are the flow of energy, the food supply and the production of all biological resources to drive the ecosystem. Light energy from the sun is captured by green plants and converted to chemical energy. Organisms use and convert this chemical energy for growth and life activities through food chain. A food chain is a succession of organisms in a community that constitutes a feeding sequence in which food energy is transferred from one organism to the other. At the bottom of the chain is a photosynthesizing plant, followed by an herbivore, a successions of carnivores, and finally decomposers. At each step, some of the chemical energy is assimilated and used by the organism and the rest is released in respiration and waste products in an ecosystem.
Last modified: Friday, 30 March 2012, 9:48 AM