Diversity in climate, vegetation and people. Consequently, the shift to goat keeping is putting increasing pressure on the pasturelands in Mongolia, threatening to accelerate pasture degradation and processes of desertification. The vulnerability to desertification of land is determined by current climate, relief, and the state of the soil and natural vegetation. Mass migration Desertification events have been a major driver behind the migration of large human populations throughout history. Most species are closely tied to their ecological niches, and to the wider environment that they live in. Earlier desertification was only a natural formation but day by day humans are becoming responsible for it because of land mismanagements.
Rarely is there a single direct cause for deforestation. These survival strategies are often accompanied by breakdowns in the integrity of communities and sometimes of families. By taking that critical look at desertification, we have the tools that we need in order to get through the processes effectively. The area naturally experiences alternating wet and dry seasons. Loose soil bury plants, or their roots become exposed and cannot fulfill their function. Where there are too many animals — livestock and otherwise — in one spot, the land takes longer to regenerate the plants.
Drylands that suffer from water scarcity are also very limited in terms of wood and crop production, as well as forage and other ecosystem services. Causes of desertification include overgrazing and removal ofvegetation cover. Which brings in the problem of overgrazing. With this region now under Roman control or destroyed, more accurately it became known as Africa Proconsularis — a province ruled by a Roman Proconsul. If done correctly, creating forestland in areas in danger of desertification can slow erosion and reduce its spread.
The irrigation scheme has rapidly increased according to the intensification of the crop production during the last ten years Thomas and Middleton, 71. Overgrazing Many areas that are now turning into desert biomes deal with the huge problem of animal grazing. Unfortunately, an area undergoing desertification is brought topublic attention only after the process is well underway. Desertification is now widespread across much of the island, though, the island was at one time mostly forested. We have indeed responded in both ways you outline above — acceptance which often leads to collapse via the over-stressing of established infrastructure and systems as seen in Sweden , or the closing off of borders which almost invariably leads to war, insurgencies, and persistent endemic irregular warfare as seen in Croatia, Serbia, Hungary and others. Plants can't grow when soil is allowed to degrade. In areas where some water is available forirrigation, shrubs planted on the lower one-third of a dune's windward side willstabilize the dune.
Desertification is the deterioration of land in arid climates due to loss of vegetation and soil moisture. Unfortunately, some of them also become extinct for their inability to cope with a sudden change of their environment. Taking a critical look at desertification will help us spur initiatives of reversal and prevention in an effective way. As in China, no sheep or grazing animals allowed up there until trees are strong enough to no be eaten. Forced to attend to the most urgent things first, populations resort to survival strategies that unfortunately make desertification worse and prevent any development. Over time, many of these areas could become uninhabitable.
Other factors that cause desertification include urbanization, climate change, overdrafting of groundwater, deforestation, natural disasters and tillage practices in agriculture that place soils more vulnerable to wind. Drylands are characterized by water scarcity stemming from the conjunction of low water offer i. On the other hand, unculturable wastelands include barren rocky areas, steep slopes, snow-capped mountains and glaciers. 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. Although their success in controlling pests on a short-term basis cannot be denied, but their long-term effectiveness in controlling pests or their overall effects on ecosystems including human health and environment has to be seriously questioned on two major grounds. However, removing international trade barriers without regulation at national level may also encourage agricultural practices. Thus, the use of pesticides leads to decline in the fertility status of soil.
If we are to stop and reverse the degradation of arid and semiarid lands, we mustunderstand how and why the rates of climate change, population growth, and foodproduction adversely affect these environments. Causes of Desertification Desertification results in continued degradation of land and of fragile ecosystems. Unprotected, dry soil surfaces then blow away with the wind or are washed away by flash floods, leaving infertile lower soil layers that bake in the sun and become an unproductive hardpan. This breakdown of the equilibrium and of the physical, chemical and biological processes that sustain it, represents the start of a process of self-destruction for all elements of the life system. For example, destruction of agricultural fields makes the fields defenceless.
They are: a Deforestation in hilly areas; b Excessive mining in hilly areas; c Construction of dams; d Infrastructure; and e Means of transport, especially construction of roads. In China, at least 3,600 square kilometers of land is taken over by sands from the Gobi Desert every year. 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. 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. If people are using land to get natural resources or they are developing it for people to live on, then the policies that govern them should be ones that will help the land to thrive instead of allowing them to harm the land further. How can desertification be managed? They bring with them their native farming grazing practices, which can be highly unsuitable for their new home.
Population pressure, however, has led to the extension of cultivated lands in. In these cases, scientists claim that rehabilitating the land after natural damage is hardly possible. Cyclical climate changes and ocean currents also affect an area's susceptibility to desertification. Deserts, semi-arid lands, and dry woodlands also constitute a large potential source of carbon emissions into the atmosphere. When topsoil is depleted of humus, it's either too loose or too compacted, both of which can lead to destructive erosion.
It extended from around what is today northeast Afghanistan to Pakistan and northwest India an area of 1. Both the human population and livestock population had tripled and the cultivated area had doubled from 1961 to 2000, suggesting that socio-economic factors might have contributed more significantly to the desertification. And try to do everything in our power to help protect natural resources we have. Hot and dry weather causes drought,that is harmful for crops and valuable plants. Urbanization can also cause soil issues thanks to the chemicals and other toxic agents people use that may harm the ground. The poorer the peoples and the less developed the countries involved, the more profound will be the future effects of desertification, and the greater the potential for tragedy when natural conditions, especially climatic, become difficult.