Explanation:
I think this answers:
This is done by making an inventory of the DIFFERENT species Versus all the species present per square unit of distance in representative habitats of the studied territory.
There is the diversity index to have a quick idea. It is obtained by dividing the number of species found in the area studied by the amount of individuals of any species found within that area. If the result is close to 1 , we are in presence of a very high biodiversity because every counted individual is of a different species. If the result of this division is near to 0, then almost all the counted individuals are of the same species, so the biodiversity is very low.
The biodiversity index must then be compared to the biodiversity index of other habitats in similar climates to judge if the studied ecosystem is of high or low biodiversity
