Ecosystems and Energy Flow
- Created by: Qiao-Chu
- Created on: 18-09-14 08:57
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- Ecosystems and Energy Flow
- Ecosystem - all the organisms living in a certain area and all the non-living conditions
- Biotic - living features of an ecosystem
- Abiotic - non-living features of an ecosystem
- Habitat - place where an organism lives within an ecosystem
- Energy transfer - main route by which energy enters an ecosystem is photosynthesis
- Alternative energy route is when bacteria use chemicals from deep sea vents
- Producers - plants convert sunlight energy to form that can be used by other organisms
- Energy transferred when organisms eat other organisms (consumer)
- Producers are eaten by primary consumers (herbivores)
- Primary consumers are eaten by secondary consumers
- Secondary consumers eaten by tertiary consumers (carnivores)
- Food chains/webs show energy transfer in an ecosystem
- Trophic level - stage in a food chain occupied by a particular group of organisms
- Energy locked up in bones and faeces are recycled back into the ecosystem by decomposers
- Decomposers - organisms that break down dead or undigested organic material e.g. bacteria and fungi
- Ecosystem - all the organisms living in a certain area and all the non-living conditions
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