Describe the use of quadrats as a technique for sampling the distribution of organisms in their habitat
• The quadrat sample that you take has to be random so there is no bias, and has to be representative (large enough) so that the estimate is as close to the true population as possible
• A grid system would be set up across the field. There would be an x and y axis, as well as numbers running across the sides of the graph
• Then random numbers would be generated for the x and y coordinate so we know where we want to place our quadrat
• Then we would count the number of whatever species we are counting.
• Your representative sample would be ideally around 10 quadrats or 10% of the whole area.
• The number of that species would be recorded into a table, then
total of species = number of species/m2
number of quadrats
• The quadrat sample that you take has to be random so there is no bias, and has to be representative (large enough) so that the estimate is as close to the true population as possible
• A grid system would be set up across the field. There would be an x and y axis, as well as numbers running across the sides of the graph
• Then random numbers would be generated for the x and y coordinate so we know where we want to place our quadrat
• Then we would count the number of whatever species we are counting.
• Your representative sample would be ideally around 10 quadrats or 10% of the whole area.
• The number of that species would be recorded into a table, then
total of species = number of species/m2
number of quadrats
very nice notes, well done
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