Desertification often causes rural lands to become unable to support the same sized populations that previously lived there. A growing body of evidence suggests that a closer look at the social system and the role of its components is critical to understanding this frequent outcome. In modern times, the use of fences has prevented domestic and wild animals from moving in response to food availability, and overgrazing has often resulted. Desertification occurs mainly in semi-arid areas average annual rainfall less than 600 mm bordering on deserts. Archived from on June 25, 2013. Agree, The government itself is the problem.
Some soils for example, clay , due to lack of water can become rather than porous as in the case of sandy soils. For example, destruction of agricultural fields makes the fields defenceless. A shepherd guiding his sheep through the high desert outside , Scientists agree, that there is a natural cause for the existence of desert in the place where is now the : a natural climate cycle cause a lack of water in this area from time to time. In many other cases, it is the interaction of human activity and climate variation that is important. The root cause of desertification is poor soil conservation leading to soil degradation.
Round the decay Of that colossal wreck, boundless and bare The lone and level sands stretch far away. Overgrazing destroys valuable plant species, leaving mostly u … npalatable ones. Key 1 is to stop herding animals on high ground, else no trees can root there. The Roman Empire The Roman Empire was affected to no small degree by the effects of land degradation, soil erosion, and desertification. Famine, poverty and political instability While desertification certainly leads to these problems, they can also be a cause of desertification.
During most of these times, deserts have grown and shrunk independent of human activities. This simple and low-cost method has enabled farmers to regenerate some 30,000 square kilometers in Niger. Larger and more frequent dust storms also result. Degradation of the soil is caused in part by over usage driven by the expansion of land being used for farming, overgrazing, and precipitation patterns. How can you identify and explain them? The loss of fertile land to desertification has brought an end to many majestic civilizations throughout human history and continues to threaten the existence of 1. Overgrazing is the major cause of desertification worldwide.
The Bantu were originally nomadic herders who traveled throughout Africa caring for their flock. It is believed that the Sahara desert was once fertile ground but now it is dried up. Desertification is a process of land-degradation by which a region becomes progressively drier and drier — eventually becoming desert. The primary cause of drought is abnormally low rainfall. Continued degradation of soil negatively affects the ability of Sahelian farmers to grow crops, results in less grazing land for livestock, and can have considerable impacts for people that live not only, but near, the degraded areas. Desertification is the process by which fertile land is transformed into desert as it becomes progressively drier and unable to support any plant growth for food production. In this area, the level of desertification is very high compared to other areas in the world.
Desertification is a huge problem that needs to be addressed accordingly, and if we take the time to do it now, we can prevent other problems from happening with it in the future. Between July 2011 and mid-2012, a severe drought affected the entire East Africa region, considered the worst in 60 years, and it caused a severe food crisis across Somalia, Djibouti, Ethiopia and Kenya that threatened the livelihood of 9. Right now there are about 20,000 Has. When animals are allowed to graze recklessly, they remove all of the native grasses, exposing the topsoil to destructive erosion forces like winds and sudden thunderstorms. Policies leading to an use of resources and the lack of adequate infrastructures are major contributors to land. Without the plants especially the trees around, the cannot thrive. Studies have shown that, in many environments, the rate of erosion and runoff decreases exponentially with increased vegetation cover.
The use of boreholes and windmills also allows livestock to stay all-year round in areas formerly grazed only during the rains when seasonal pans held water. Here are some facts about desertification and drought that you should know. Trees play a crucial role in anchoring down topsoil and slowing down the force of winds. It must be possible to reverse the process, but I suspect it would be a long term project and require a lot of resources. What will happen if the six-year drought continues? Polluted sources of drinking water Vegetation plays an important role in cleaning our water. Some statistics have shown that since 1900 the Sahara has expanded by 250 km to the south over a stretch of land from west to east 6,000 km long. The biggest one in popular theory appears to be natural Climatic changes which are being sped up by man-made causes.
Early human pastoralists living in semi-arid areas copied this natural system. Not banning grazing animals high up otherwise perpetuates the no trees high up situation, as the grazing animals eat all the shoots. Unless climate change is slowed down, huge areas of land will become desert; some of those areas may even become uninhabitable as time goes on. Critics of both say, however, that central planning would not be as effective as supporting local sustainable farming methods, since such. Klausmeier attributes this patterning to dynamics in plant-water interaction.
Currently, photos show that the Gobi Desert has expanded to the point the entire nation of Croatia could fit inside its area. Then, the same cycle takes place again. There also has to be an overall shortage of water in the area in the form of shallow aquifers, otherwise it won't become a desert. Activities like deforestation, overgrazing, poor conservation of soil, etc. The removal of plants and the reduction of plant cover lead to advanced soil erosion and increase the chance of raindrop impact and runoff. Animal grazing may also cause the lack of natural vegetation fo … rest , and, hence, lack of plant roots to bind the soil particles together, and this will cause soil erosion. This usually strips the soil of nutrients, which in turn kills the plant life, which in turn starts the process toward becoming a desert biome as time goes on.