Competiton

• Organisms compete for resources to survive

  • plants need light and space as well as water and mineral ions from the soil
  • animals need space territory, food, water and mates
  • Organisms compete with other species for the same resources
• Any change in the environment can have an effect

  • in the community each species depends on other species for things such as food, shelter, pollination and seed dispersal (interdependence)
  • the interdependence of all the living things in an ecosystem means that any major change in the ecosystem can have far-reaching effects
  • the diagram on the right shows part of a food web from a stream