Table 4 Estimates of the initial curvature of kinship-distance graphs including d, the coefficient of (ln(x))³ of the polynomial regression of third degree of residuals (F_ij−F_{ij exp}) on the logarithm of distance (y=a+b^*ln(x)+c^*(ln(x))²+d^*(ln(x))³) and k, the second derivative of this equation at the average distance of the first distance class (1st DC), or at a distance of 2 m, which corresponds to neighbouring individuals

From: Within-population spatial genetic structure in four naturally fragmented species of a neotropical inselberg radiation, Alcantarea imperialis, A. geniculata, A. glaziouana and A. regina (Bromeliaceae)