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 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.
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 is the impact of desertification on the environment?
Desertification has caused major environmental and socioeconomic problems in many arid and semiarid areas of the world1. It causes soil degradation and severely reduces potential land productivity2–4, which causes degradation of the ecosystem and its associated ecosystem services.
Why is desertification so bad 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 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 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.
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.
How does desertification affect human health?
The result is crop failure, soil erosion, famine and hunger: people are then less able to work when their need is greatest. It becomes a vicious circle and can result in many deaths, especially among infants and the elderly.
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 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.