Competition

• What is a habitat?

  The place where an organism lives
• What is a population?

  All of the organisms of one species living in a habitat
• What is a community?

  The populations of different species living in a habitat
• What are abiotic factors?

  Non-living factors in the environment e.g. temperature
• What are biotic factors?

  Living factors of the environment e.g. food
• What is an ecosystem?

  The interaction of a community of living organisms (biotic) with the non-living (abiotic) parts of their environment
• Organisms compete for resources to survive
• Plants need light and space, as well as water and nutrients from soil
• Animals need space/territory, food, water and mates
• Changes in environments can have knock-on effects
• What is the term for species depending on each other for food and shelter etc.?

  Interdependance
• Interdependence means major changes can have far-reaching effects
• Are effects easy or difficult to predict in food webs?

  Difficult
• What is the term for a community where the species and environmental factors are in balance so populations are roughly constant?

  Stable community
• 2 examples of stable communities

  • Tropical rainforests
  • Ancient oak woodlands