Empirical models tested for mahogany (Swietenia macrophylla) seed dispersal expressed in one dimension and two dimensions downwind of 25 isolated trees at the Marajoara forest in Pará, Brazil.

r is the distance from the stem of the source tree.1Cousens et al. [4] (see Table 5.2 therein).2see Clark et al. 1999 [20].3Cousens et al. [4] (see Table 5.1 therein).4see Greene et al. 2004 [21].5see reference of Whelan 1988 in [4]; this is not the modified Wald equation by Katul et al. 2005 in which both parameters are estimated from wind speed and plant attributes.6see Higgins & Richardson 1999 in [4]; also see [21] and [33].