The populations of different species living in a habitat.
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Ecosystem
Front
The interaction of a community of living organisms (biotic) with the non-living (abiotic) parts of their environment.
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Population
Front
All the organisms of one species living in a habitat.
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Habitat
Front
The place where an organism lives.
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Abiotic
Front
Non-living factors of the environment, e.g. temperature.
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Biotic
Front
Living factors of the environment, e.g. food.
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Stable Community
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When all the species and environmental factors are in balance so that the population sizes are roughly constant, e.g. tropical rainforests and ancient oak woodlands.