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Photosynthesis
Producers – Consumers – Decomposers
Ecology is the study of the interactions among plants and animals and their interrelationships with the physical environment. Since biologists agree that no organism can exist as a separate entity, each is therefore dependent on the other as well as on the non-living environment. In a community, which is all the plant and animal populations of a given area, many interactions take place between the living and non-living things. When this community system becomes a self-contained, interdependent and stable unit, it is called an ecosystem. The ecosystem is the basic or “lowest level of organization in ecology in which all living and non-living environmental factors exist and interact.” An example of an ecosystem is a terrarium.
The interactions that occur in an ecosystem are both biotic (living) and abiotic (non-living). They both depend on a constant energy source, which can be converted into organic compounds, and must be able to cycle and recycle materials. The energy must be able to flow from one population or organism to another. Terrarium
