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.
Why is desertification a 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 desertification and how is it affecting Africa?
Desertification is, “land degradation in arid, semi-arid, and dry sub-humid areas resulting from various factors, including climatic variations and human activities“. Excluded in the definition are areas that have a hyper-arid or a humid climate. … Desertification processes affect about 46% of Africa.
What are the impacts 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.
How can desertification affect humans?
Land degradation and desertification can affect human health through complex pathways. As land is degraded and deserts expand in some places, food production is reduced, water sources dry up and populations are pressured to move to more hospitable areas. … the spread of infectious diseases as populations migrate.
How does desertification affect wildlife?
Plants, animals and other organisms that live in deserts have evolved to survive harsh conditions, scarce water and barren landscapes. … This desertification is exacerbated by human exploitation of ecosystems that border deserts, causing land degradation, soil erosion and sterility, and a loss of biodiversity.
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 countries is desertification the most serious problem?
Africa is the worst affected continent; with two-thirds of its land either desert or drylands. Almost a third of land in the U.S. is affected by desertification; and one quarter of Latin America and the Caribbean, and one fifth of Spain. * Desertification is mainly a problem of sustainable development.
What are people doing to stop desertification in Africa?
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 can desertification be prevented?
Strategies to reduce desertification
- Planting more trees – the roots of trees hold the soil together and help to reduce soil erosion from wind and rain.
- Improving the quality of the soil – this can be managed by encouraging people to reduce the number of grazing animals they have and grow crops instead.