Ecology

• how does Biotic factors affect the community?

  • new predators
  • new pathogens
  • species outcompeting
  • food availability
  • water availability
  • cannot breed
• How does non biotic factors affect the community?

  • light intensity
  • temperature
  • moisture levels
  • carbon dioxide levels
  • wind intensity
  • soil pH
• Describe the water cycle

  • water is evaporated by the suns heat
  • the heat warms up the ground water which turns to water vapour
  • water condensates and cools down to form a cloud
  • precipitation happens when it rains
• atmosphere

  • 78% nitrogen
  • 21% oxygen
  • 0.04 co2
• Community

  all luving organisms, different species living in the same area
• population

  group of organisms of the same species living in the same are
• ecosystem


  selft contained system, consists of all non living and living things in the same area
• species

  a group of organisms who are so genetically similar they can interbreed
• using a quadrat make an investigation

  • use a quadrat in a given area 1m x 1m
  • quadrats are places randomly
  • use random coordinat on the calculator
  • repeat 10 times
  • count the number of plants in each quadrat
  • calculate the mean per quadrat