Disturbances alter the population dynamics of "Dioon edule" populations. If a population is heavily dominated by adult plants, the disturbance will be minimal as compared to the population consisting of younger plants. This is due to their ability to survive harsh conditions. "D. edule" exemplifies a Type III survivorship curve and clumped distributions. It is found mostly on shallow, rocky soils due to competition with other, faster growing species for water, nutrients and seed dispersal. In response, they have developed a selective advantage for growing in these harsh climates including vigorous tap roots for anchorage and water conduction. Furthermore, it is harder for rodents to reach the plant and seeds if they are established in difficult locations to reach. In addition to competition, causal agents of "D. edule's" random, clumped distribution include predation, variations in temperature and precipitation, and measures of seed dispersal.