Density Independent
- Invasive Species: Due to fragile relationships between organisims a invasive species in thsi region would be horrible. A plant that would absorb water faster than cacti could reduce producer biomass and decrease energy levels and biomass for all populations.
- Human Invasion: Our encroachment has meant less and less area for the desert animals to survive. We have destroyed many cacti and habitats. Our pollutants have also decreased clean watering holes and could have an affect on killing cacti with chemicals.
- Natural Disasters: A forest fire or flash flood is not affected by population. As explained in Succession these disasters are potentially fatal for shelters of organisms.
Density Dependent
- Crowding: Most organisims in the biome