competition and interdependence

• What is the key concept in ecology regarding organisms?

  All organisms have relationships with each other
• What types of relationships do mice have?

  With other mice, plants, predators, and environment
• How do mice interact with their environment?

  They breathe oxygen and burrow in soil
• What happens if the mouse population decreases?

  Predators have less food and soil quality decreases
• What is a habitat?

  • The place where an organism lives
  • Examples: field, forest, basement
• What is a population in ecology?

  All organisms of a particular species in a habitat
• What constitutes a community in ecology?

  All populations of different species in a habitat
• What are biotic factors?

  Living factors like food availability and predators
• What are abiotic factors?

  Non-living factors like temperature and soil pH
• What is an ecosystem?

  • Interaction of a community of living organisms
  • With the non-living parts of their environment
• What is the main focus of ecology?

  Understanding how ecosystems function and change
• What resources do animals need to survive?

  • Space (territory)
  • Food
  • Water
  • Mates for reproduction
• What resources do plants need to survive?

  • Light
  • Space
  • Water
  • Mineral ions from soil
• Why do organisms compete with each other?

  Resources are limited and need to be shared
• What is interdependence in ecology?

  All species depend on other species in some way
• How does a food web illustrate interdependence?

  • Shows feeding relationships within a community
  • Changes in one species affect others
• What happens if the mouse population increases?

  Grass decreases, affecting rabbits and grasshoppers
• What might happen to hawk populations if mice increase?

  Hawk populations may increase but not significantly
• What are the knock-on effects of changes in species populations?

  • Changes affect food availability
  • Can lead to population declines in other species
• Is it necessary to remember specific examples in ecology?

  No, understanding relationships is sufficient
• What should you focus on in ecology studies?

  Understanding relationships and predicting effects