practicals

• what is the purpose of random sampling?

  to estimate the size of a population in an area
• what is a quadrat?

  a frame with a known area
• to estimate population size you must

  1. use 10 or more quadrats and place them randomly
  2. count organisms in each quadrat
  3. use mean number of organisms and multiply by area of field
  4. repeat in different areas
• what is systematic samplings purpose?

  to see how populations and communities change over a distance
• distribution using transects (systematic )?

  1. place tape measure across area
  2. place quadrats next to tape at regular intervals
  3. count number of organisms in each quadrats