Figure 7. Species-area curves for different values of dispersal parameter.
Number of species 
is plotted against area for 
and speciation rate 
. The symbols denote diferrent set of parameter values : 
and 
(circles), 
and 
(triangles up), 
and 
(diamonds), 
and 
(left triangles). The line is the theoretical prediction for the species-area curve if dispersal is not limited as given by Eq. (5). The data points represent an average over 
independent runs. The error bars correspond to one standard error.