Agriculture in Africa tends to result in low productivity, as most of the land is characterized as a semi-desert. Clearing the land of trees also reduces the structure of the soil. Coupled with wind erosion, the topsoil blows away and leaves a desert-like land.
What are three effects of desertification in Africa?
Desertification affects topsoil, groundwater reserves, surface runoff, human, animal, and plant populations. Water scarcity in drylands limits the production of wood, crops, forage, and other services that ecosystems provide to our community.
What are the effects of desertification in South Africa?
South Africa is losing about 300 to 400 million tons of topsoil every year. Areas such as the Northern Cape are especially prone to desertification. To halt desertification the number of animals on the land must be reduced, allowing plants to regrow.
What are three effects of desertification?
Higher food prices, water availability, violent conflicts for land, migration, increasing poverty, pollution from wind-blown dust particles coming from distant lands, could be the outcomes of desertification if we let it consume more of our planet.
What are the main effects of desertification?
“In many countries, desertification means a decline in soil fertility, a reduction in vegetation cover – especially grass cover – and more invasive shrub species. Practically speaking, the consequences of this are less available land for grazing, and less productive soils.
Why is desertification a huge problem in Africa?
It has been estimated that 319 million hectares of Africa are vulnerable to desertification hazards due to sand movement. … Deforestation exposes the soil to high temperatures which break down the organic matter, increase evaporation and make the soils vulnerable to erosion.
What is the main cause of desertification in Africa?
Poverty-related agricultural practices are a major contributor to desertification. Continuous cultivation without adding supplements, overgrazing, lack of soil and water conservation structures, and indiscriminate bushfires aggravate the process of desertification.
What is the importance of droughts and desertification in South Africa?
The significance of these problems in the region is demonstrated by outlining the impact that drought and desertification have on economic growth and poverty reduction, agriculture and food security, water, biodiversity, energy and migration.
How is desertification caused?
Human activities that contribute to desertification include the expansion and intensive use of agricultural lands, poor irrigation practices, deforestation, and overgrazing. These unsustainable land uses place enormous pressure on the land by altering its soil chemistry and hydrology.
Why is desertification a problem?
* Desertification is mainly a problem of sustainable development. Its causes include over-cropping, over-grazing, improper irrigation practices, and deforestation. Poor land management practices such as these often stem from the socioeconomic conditions in which the farmers live, and can be prevented.
What are the harmful effects of desertification quizlet?
Population increase, cutting trees, over-cultivation, overgrazing and opening up marginal land. Change in ecological system, effect on human activities, decrease in crop yield, sandstorms and flooding. Desertification not only affects the local people, but also the rest of the world.
How can desertification be prevented?
Preventive actions include:
- Integrating land and water management to protect soils from erosion, salinization, and other forms of degradation.
- Protecting the vegetative cover, which can be a major instrument for soil conservation against wind and water erosion.
How does desertification affect Africa’s economy?
Desertification affects about 46 percent of Africa. … Agriculture in Africa tends to result in low productivity, as most of the land is characterized as a semi-desert. Clearing the land of trees also reduces the structure of the soil. Coupled with wind erosion, the topsoil blows away and leaves a desert-like land.
Who is affected by desertification?
Desertification occurs on all continents except Antarctica and affects the livelihoods of millions of people, including a large proportion of the poor in drylands.
What are the causes and effects of deforestation?
The loss of trees and other vegetation can cause climate change, desertification, soil erosion, fewer crops, flooding, increased greenhouse gases in the atmosphere, and a host of problems for indigenous people.
How does overgrazing affect desertification?
Overgrazing – an increasing population results in larger desert areas being farmed. Sheep, cattle and goats are overgrazing the vegetation. This leaves the soil exposed to erosion. Soil erosion – this is made worse by overgrazing and the removal of wood.