Figure 2. A in Beetle species diversity in the Lesser Antilles islands: How many species are really there?

Figure 2. A theoretical relationship between increasing island area and the increase in beetle species which should be on individual islands in the Lesser Antilles. Data points are for present day island areas and published species records. The regression line slope with a z value of 0.301 indicates a natural saturation number of species which could be expected to occur on an island of a designated area. The line is anchored on the island of Montserrat, which, through the work of Ivie et al. (2008), is the only well-known island in the Lesser Antilles. The difference between the regression line and a datum point suggests how many additional species might be expected with a complete knowledge of each island's fauna.