sampling organsims

• Quadrat


  A wooden or plastic square used to sample organisms in an area
• Random sampling


  1. Place quadrat at random locations

  2. Count organisms inside quadrat

  3. Repeat at multiple random locations
• Fewer ferns found in light conditions

  Compared to dark conditions
• Transect


  A line (e.g. tape measure) used to sample organisms at intervals across a habitat
• Sampling along a transect

  1. Place transect across habitat

  2. Place quadrat at intervals along transect

  3. Count organisms in each quadrat

  4. Repeat transect at multiple locations
• Carrying out sampling multiple times is important to get valid results