User:Saeedghalati/sandbox

Quantifying the differences between Species Abundance Distributions (SAD)
There are many ways of plotting and visualizing SADs like

- A simple histogram of number of species vs. abundance on an arithmetic scale.

- A histogram with abundance on a log-scale. Note the traditional format is to use log2.

- A rank-abundance diagram (sometimes called a RAD). Log abundance is plotted against the rank (1 = highest abundance out to S = number of species for the lowest abundance).

- An empirical cumulative distribution function (ECDF). Note that both the x- and y- axes are scaled into percentages.

Rank Abundance Diagrams (RADs), Frequency histogram (Preston Plot),