PHOTO: http://travelandtourismtoday.blogspot.com/2011/05/sahara-desert-hottest-desert-in-world.html
CYCLES
The Nitrogen Cycle describes the routes that nitrogen atoms take through the environment.The nitrogen cycle relies on bacteria that make nitrogen useful to organisms and bacteria that can return it to the atmosphere. This diagram shows that the atmosphere (nitrogen gas) goes through the fixation of lightning and the fixation of the organisms and into the soil organic matter (ammonia). From there the organic matter converts by bacteria to ammonium then to nitrification to nitrite ions and into denitrification. Or it could go from ammonium and then its used by plants and goes into the land plants and into consumers then to decomposition and waste back to the soil. Because the sahara has so few plants the soil has so few nutrients, i see this in all three of the cycles
The Phosphorus Cycle describes the routs that phosphorus atoms take through the environment. Plants take up phosphorus through their roots only when it is dissolved in water. Consumers acquire phosphorus from the water they drink and the organisms they eat. The waste of consumers contains phosphorus that decomposers return to the soil. In this cycle soil has phosphorus and it is uptake and it goes into the land plants and then into the consumers and then to the decomposers and keeps doing that.
The carbon cycle describes the routes that carbon atoms take as they move through the environment. Producers play vital roles in he cycling of carbon through the environment. Limestone and other sedimentary rock make up the largest reservoir of carbon. Sedimentary rock releases some of its carbon through erosion and eruptions. The mountain range is where the process of carbon is and it moves to the atmosphere. There is carbon in land plants, consumers, and they go into the decomposition and then into the soil. Then it goes into cellular respiration and back into the atmosphere. Carbon is also in the process of photosynthesis.