What is the main cause of desertification. Desertification 2019-01-28

What is the main cause of desertification Rating: 4,8/10 1720 reviews

Desertification in Africa (Google / Edennis)

what is the main cause of desertification

The soil the birch forest stood in was typically 6 feet deep. It reduces the depth of soil where it takes place, depletes the ground water table, limits the moisture storage capacity and feeding zones of the crops, deteriorates the soil organic matter, destroys soil structure and impairs fertility due to nutrient losses. Advancements could help us find more ways to prevent the issue from becoming epidemic. Landsat images ofthe same area, taken several years apart but during the same point in the growingseason, may indicate changes in the susceptibility of land to desertification. If the rains fail it can cause drought.

Next

Land Degradation: 9 Main Causes of Land Degradation

what is the main cause of desertification

Round the decay Of that colossal wreck, boundless and bare The lone and level sands stretch far away. In turn, this phenomenon affects both people and wildlife, sometimes in an irreversible way. In 1988 Ridley Nelson pointed outin an important scientific paper that the desertification problem and processesare not clearly defined. By taking that critical look at desertification, we have the tools that we need in order to get through the processes effectively. Water scarcity in drylands limits the production of wood, crops, forage and other services that ecosystems provide to our community.

Next

Desertification

what is the main cause of desertification

Technology Advances Unfortunately, preventing desertification is not always possible. Desertification is defined as a process of in arid, semi-arid and sub-humid areas due to various factors including climatic variations and human activities. Salt encroachment of surface areas that turn into deserts due to a rise in underground salt water tables, and, overuse, damming and pollution of natural waterways and aquifers. Human induced activities are also responsible for landslides. Migrations and refugees would become less of a problem to neighbouring countries when sustainable agriculture is practised in formerly barren areas. 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. The Sahel region of Africa has been suffering from drought on a regular basis since the early 1980s.

Next

What Are the Main Causes of Desertification?

what is the main cause of desertification

During the dust bowl period, millions of people were forced to abandon theirfarms and livelihoods. Grasses are essential to anchoring arid topsoil in a dryland region. This increases loose soil movement and seeds have little or no chance of germinating. Lad-slides are common in mountainous regions especially those which are situated along the river banks or near the coastline. Causes of desertification include overgrazing and removal ofvegetation cover.

Next

Causes and Effects of Desertification

what is the main cause of desertification

Overgrazing: Increase in livestock population results in overexploitation of pastures. Since rainfall is infrequent in semiarid regions, the land is not built to support huge fields of crops or supply grazing land for hundreds of thousands of cattle. Similarly, many rural people's perception of the environment and their relationship with it is changing, or has already changed in some places. It is called sheet 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.

Next

Desertification: 4. What are the major causes of desertification?

what is the main cause of desertification

I have spent the past couple of hours watching them and related videos. Other factors that cause desertification include urbanization, , overdrafting of groundwater, , natural disasters and tillage practices in agriculture that place soils more vulnerable to wind. Additionally, if the land is used for grazing at this stage, it only results in a quicker loss of plant species and total degradation. Afforestation is sometimes considered as a method for stopping or slowing desertification. In those cases, there needs to be research and advancements in technology that push the limits of what we currently know.

Next

Africa's Environmental Issues Flashcards

what is the main cause of desertification

It is caused by a variety of factors, such as climate change and human activities. Selective production and export , such as those in the European Union and the U. Famine, poverty, and starvation Due to drought conditions and a loss of productive land, local people find themselves experiencing famine and poverty, as well as potentially the starvation of themselves and their livestock. Adverse changes in physical, chemical or biological characteristics of the soil result in reduced fertility and soil erosion. Such activities and variations are droughts and floods.

Next

Africa's Environmental Issues Flashcards

what is the main cause of desertification

The agricultural sector consists of two main subsector, these are crop production and livestock production. Control and security does not necessarily require private property rights; and collective and -based management practices have proven quite effective. Overgrazing Many areas that are now turning into desert biomes deal with the huge problem of animal grazing. Over farming - crops use up so much of the lands nutrients that new plants cannot grow. Mass migration to Europe from the Middle East is well underway, due to the wars in Afghanistan, Iran, Irak, Syria, Sudan, Eritrea, and unrest in other areas of Africa. Perhaps the greatest cause of soil degradation and desertification is an explosion in world , particularly in developing countries.

Next