Pérez-Villafaña M. G., Valiente-Banuet A., Effectiveness of Dispersal of an Ornithocorous Cactus Myrtillocactus geometrizans (Cactaceae) in a Patchy Environment, The Open Biology Journal, 2009, 2:101-113, doi: 10.2174/1874196700902010101
The study near Zapotitlán de las Salinas combines observations of fruit consumers with germination experiments and analysis of bird movements. It identifies the importance of seed deposition sites and bird behaviour after feeding. Phainopepla nitens had the highest estimated dispersal effectiveness within the vegetation patch studied.