Ecology

• Biosphere

  regions of surface or atmosphere of earth where organisms live
• Niche

  role an organism plays
• Population

  group of individuals of one species which occupy the same habitat at the same time and have the ability to interbreed
• Community

  populations of different species form this within a particular place and time
• Carrying Capacity

  the size of the population an ecosystem can support
• Mark-Release-Recapture

  Capture sample

  mark in a non-harmful and non identifiable way and release

  after enough time for marked to disperse into habitat, recapture 2nd sample

  see how mant of 2nd sample are marked and repeat
• Sampling non-motile organisms

  set out a grid

  use random number generator to create coordinates to avoid bias

  place a quadrat at the coordinate

  count the number of individuals of species / number of species

  repeat many times eg 10