Ecology

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SAMPLING

RANDOM SAMPLING

  • Representative sample of study area wanted
  • Involves 2 measuring tapes placed along 2 sides of area like axes
  • Random number generator (e.g a calculator) used to get coordinates for sampling points
  • Large number of samples- to minimise skewed sample and increase reliability 

SYSTEMATIC SAMPLING

  • Choose where to take sample as you are investigating a specific pattern in ecosystem
  • Most common kind is using a transect 
  • Line transect- organisms touching the transect are recorded (unrepresentative)
  • Belt transect- quadrats placed at intervals, organisms within each quadrat recorded…

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