Biotic factors are those relating to living organisms, while abiotic factors are not associated with or derived from living organisms. Measuring change in these systems can easily be found by using the quadratic method and then calculating the diversity index for the biotic factors and only comparing for the abiotic factors. The biotic factor used to look upon will be the amount of blueberries and birches and the abiotic factors used to look upon will the change in humidity, which means the changes from wet and dry land. These are the variables that will be looked upon.

Creating squares to find the population and how much from different places will give you different values. To get the most approximate value is to add all the blueberries found in all the squares and then take the mean out of it. Later on the same thing with the birches has to be done. After that we proceed in doing the diversity index for them and afterwards we compare the