GCSE Combined Science (AQA)

622 videos | 38 hours

Communities & Ecosystems

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Ecology Adaptations, Interdependence and Competition

Communities & Ecosystems

1:36 Communities
Spec 4.7.1.1
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  • Ecology requires defining terminology to describe different levels of ecosystem organization.
  • Habitats, where organisms live within an ecosystem, include deserts, ponds, and woodlands.
  • The term "habitat" should be familiar from key stage three education.
  • A population consists of all organisms of the same species living in a specific area, such as a pond.
  • A community is made up of two or more populations of different species within an ecosystem.
  • An ecosystem involves the interaction between a community of living organisms (biotic) and the non-living (abiotic) parts of their environment.
  • Ecosystem interactions include dependencies for food and the impact of environmental elements like weather on organisms.
  • Examples of ecosystem interactions: bees need pollen and nectar from plants, which in turn rely on bees for pollination; birds eat mulberries and help in seed dispersal while also controlling mouse populations to protect plant life.
  • Further details on biotic and abiotic factors are provided elsewhere.

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