The species diversity of plants (22 per cent) is much less than that of animals (72 per cent). What could be the explanations to how animals achieved greater diversification?
The slope of regression (Z) is very important for determining species-area relationship. The smaller areas tend to have the similar value of Z that is in the range of 0.1 to 0.2 regardless of the taxonomic group or the region. But, if a larger area is taken into account then the slope of regression is found to be steeper and has the value in the range of 0.6 to 1.2. Thus we can determine from the slope of regression if the area taken into account is large or small.