TuesdayThe analysis of species richness in grid cells from four regions
(Table 1), shows that not only recorded but also F3-estimated
species richness follows the GIS-estimated pattern indicated
in fig. 1A. The unusual relation between latitude and species
richness is therefore not the consequence of erroneous range
estimates in Beck & Kitching (2004). F3 estimates are
generally higher than range map-based figures from Beck &
Kitching (2004), a property that was also found in
comparisons in other regions (Beck & Kitching, in press).