Sensitivity of the immigration parameter <i>I˜</i>, as predicted from Gaussian and Cauchy dispersal kernels, to dispersal distance and local community radius.

<p>Isolines of are functions of the community radius <i>R_c</i> (10<<i>R_c</i> <600 m) and of the 95% quantile, (1<<600 m), for the Gaussian (left) and Cauchy (right) dispersal kernels. The null isoline of <i>x</i> represents the limit (equal sensitivity to the variation in <i>R_c</i> and ) between the dispersal dependent (DD, <i>x</i><0) and size dependent (SD, <i>x</i> > 0) zones (see main text). We displayed field plot locations (using the codes in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0072497#pone-0072497-t001" target="_blank">Table 1</a>) by calculating the values corresponding to each plot size. Most of the plots fall into the DD and SD zones for the Gaussian Cauchy kernel, respectively.