Quadrats + transects

• What is the aim of the field investigation?

  Estimate plant population size and distribution
• What is the purpose of random sampling in this investigation?

  To estimate the population size of a plant species
• What does continuous sampling with a transect line investigate?

  The effect of variation in a factor on distribution
• What equipment is needed for the field investigation?

  • Frame quadrat (25 cm by 25 cm)
  • Tape measures
  • Clipboard
  • Pen
  • Paper
• What is the first step in Method A for estimating population size?

  Use a random number generator for coordinates
• How many samples should be taken in Method A?

  Ten samples
• What formula is used to estimate the population size?

  Total area / area of quadrat x mean number of individuals
• What should be written down before starting Method B?

  A hypothesis about an abiotic factor's effect
• Where should the tape measure be laid in Method B?

  From the base of a tree to an open area
• How is the quadrat positioned along the tape measure?

  One corner touches the '0' mark
• What should be done after counting the plants in the quadrat?

  Record the number in a table
• How often should the quadrat be moved along the tape measure?

  Every 5 meters
• What should be plotted on the graph in Method B?

  Number of plants against ecological gradient
• What are the controlled variables in the investigation?

  • Size of quadrats
  • Number of repetitions in each site
  • Method of counting
  • Coordinate system at each site
• What should be considered in the extension of the investigation?

  Other factors affecting plant distribution
• What is a potential source of error in the investigation?

  Some species may be too small to see
• What is the risk assessment for handling certain plants?

  They may cause allergic reactions or cuts