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What is desertification short answer?

2022-08-07 14:00:03
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What is desertification short answer?

desertification, also called desertization, the process by which natural or human causes reduce the biological productivity of drylands (arid and semiarid lands).

What are 3 causes of desertification?

Various Causes of Desertification

  • Overgrazing. ...
  • Deforestation. ...
  • Farming Practices. ...
  • Excessive Use of Fertilizers and Pesticides. ...
  • Overdrafting of groundwater. ...
  • Urbanization and Other Types of Land Development. ...
  • Climate Change. ...
  • Stripping the Land of Resources.

What is desertification explain with example?

Desertification is the degradation process by which a fertile land changes itself into a desert by losing its flora and fauna, this can be caused by drought, deforestation, climate change, human activities or improper agriculture.

What is desertification in basic science?

Desertification is the degradation of land in any dry land.It is caused by a variety of factors, such as climate change and human activities. Desertification is a significant global ecological and environmental problem.

What is desertification in Africa?

Vulnerability to desertification in Africa is assessed using the information on soils, climate, and the previously evaluated land resource stresses. Desertification is, "land degradation in arid, semi-arid, and dry sub-humid areas resulting from various factors, including climatic variations and human activities".

What are the effects of desertification?

CONSEQUENCES OF DESERTIFICATION

Loss of biodiversity by worsening the living conditions of many species. Food insecurity due to crop failure or reduced yields. The loss of vegetation cover and therefore of food for livestock and humans. Increased risk of zoonotic diseases, such as COVID-19.

Where is desertification occurring today?

Africa is the simple answer to the question: where is desertification happening? More specifically, desertification plays its largest role in the grasslands of East Africa, the Kalahari Desert and the Sahara Desert. These regions span over 65 percent of the land.

What is desert encroachment in geography?

Desert encroachment as a degradation of land in arid, semi-arid and sub-humid dry areas caused mainly by climatic changes and human activities; In Nigeria, the dry land parts of the country are more prone to desertification.

What are the five main causes of desertification?

From Climatic Variations To Human Activities, Here Are 5 Major Causes Of Desertification

  • Deforestation. Image source: Wikimedia commons. ...
  • Overgrazing. ...
  • Climatic Variations. ...
  • Excessive Use Of Fertilizers And Pesticides. ...
  • Over Drafting Of Groundwater.

Oct 29, 2020

Why is desertification a threat?

A slow process in which land productivity and resilience steadily decline, overgrazing, deforestation and unsustainable agricultural practices are the main causes of desertification. Mining and climate change are also major causes.

What are the control of desertification?

By pounding the soil with their hooves, livestock compact the substrate, increase the proportion of fine material, and reduce the percolation rate of the soil, thus encouraging erosion by wind and water. Grazing and the collection of firewood reduce or eliminate plants that help to bind the soil.

Which desert is known as man made desert?

Answer: Aralkum desert is most recent one, formed entirely due to anthropogenic factors. It is located in Uzbekistan and Kazakhstan in central Asia.

Did humans cause the Sahara desert?

At a Glance

Humans helped to keep the Sahara green for at least 500 years longer than expected before the region fully transformed into a dry, barren desert, scientists say.

Why are deserts expanding?

Deserts are expanding – every year they grow by an area around the size of Ireland. But it's not a natural process; it's manmade. Overgrazing, increasing agriculture, deforestation and a growing use of water are eroding the land. And it is particularly affecting parts of Africa, America or Asia.

What are the types of desertification?

The classification system used in the preparation of continental desertification maps is based on four classes of desertification: slight, moderate, severe, and very severe.

Can we reverse desertification?

Repair degraded land

Restoring some natural vegetation and planting drought resistant shrubs is another way to reverse some of the effects of desertification. The Great Green Initiative in the Sahel and Sahara aims to restore 100 million hectares of degraded land.

How do you stop degradation?

What Can We Do to Control Environmental Degradation?

  1. By planting more trees.
  2. Rainwater harvesting.
  3. Reduce, Reuse, and Recycle.
  4. By reducing the use of chlorofluorocarbons.
  5. Reduce fuel consumption.
  6. Treating the industrial effluents before dumping them in water bodies.
  7. Reducing the use of fertilizers.
  8. Control population growth.

Oct 18, 2020

Why is the Sahel at risk of desertification?

Where the vegetation cover is lost, there is more evaporation and the soil is exposed to erosion by wind and rain. It is estimated that over-grazing is the main cause of desertification for 65% of affected land in the Sahel.

What is the difference between drought and desertification?

Drought is natural phenomenon when one area receives no water and becomes barren with no vegetation. Desertification is a process of turning out a productive fertile land to a non-productive land and in severe cases the drylands are termed as desertification.

What was the Sahel?

In pure geographic terms the Sahel, or Sahil in Arabic, meaning coast or shore, is a vast region that stretches along the Sahara desert's southern rim from the Atlantic to the Red Sea. Wedged between the desert to the north and tropical forests and savannah to the south, the belt has a tropical semi-arid climate.

What is soil depletion?

Soil depletion occurs when the components which contribute to fertility are removed and not replaced, and the conditions which support soil's fertility are not maintained. This leads to poor crop yields. In agriculture, depletion can be due to excessively intense cultivation and inadequate soil management.

What are the solutions to soil degradation?

You can reduce soil erosion by:

  • Maintaining a healthy, perennial plant cover.
  • Mulching.
  • Planting a cover crop – such as winter rye in vegetable gardens. ...
  • Placing crushed stone, wood chips, and other similar materials in heavily used areas where vegetation is hard to establish and maintain.

What are the activities that destroy soil?

Explanation: Soil erosion is the main activity to destroy the soil that is, it occurs naturally by wind or harsh climatic conditions human activities include overgrazing , overcropping, and deforestation. Overgrazing occurs when farmers stock too man animals sheep cattle or goats on their land.