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Ecosystems are dynamic, and continually changing.

All organisms occupy a specific niche within an ecosystem. A niche is an organism's role within its ecosystem, encompassing its food source, physiology, and behaviour. Natural selection ensures that organisms are adapted to a specific niche.
Overlap between the niche's of two species in the same ecosystem results in interspecific competition.

Succession is the gradual change in a community over time. During succession, the organisms within an ecosystem change its abiotic


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