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.
How have people contributed to the desertification of 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 the 3 main causes of desertification in Africa?
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 natural event do scientists blame for the desertification taking place in South Africa?
Overgrazing and woodcutting are responsible for most of the desertification of rangelands, cultivation practices inducing accelerated water and wind erosion are most responsible in the rain-fed croplands, and improper water management leading to salinization is the cause of the deterioration of irrigated lands.
What are 2 human causes of desertification?
‘Climatic variations’ and ‘Human activities’ can be regarded as the two main causes of desertification. removal of the natural vegetation cover（by taking too much fuel wood）, agricultural activities in the vulnerable ecosystems of arid and semi-arid areas, which are thus strained beyond their capacity.
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.
What are the signs of desertification?
The signs, magnitude and severity of desertification can be established through such hydrological indicators as reduced area of water bodies, increased runoff and consequently decreased rainwater infiltration, accelerated soil erosion and sedimentation, and deteriorated ground-water resources.
Which countries are most affected by desertification?
Africa and Asia are the most affected areas in the world by desertification. The impact of climate change and human activities are present in these areas with high levels of desertification compared to other areas in the world.
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.
What are the 3 main causes of desertification?
The main causes of desertification include:
- Population growth – the population in some desert areas is increasing. …
- Removal of wood – in developing countries, people use wood for cooking. …
- Overgrazing – an increasing population results in larger desert areas being farmed.
Who is impacted 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 examples of desertification?
Additional savannas, grasslands, and woodlands are common indications of desertification in arid and semi-arid areas. Well-known examples of this occurrence include, Europe’s Adriatic Sea, the Middle-East’s Saharan desert, and China’s Taklamakhan Desert. Sand dunes are formed in the Sahara Desert in the image above.
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 does desertification affect economy?
World Atlas of Desertification
As the world develops economically and its population increases, pressure on land resources is increasing. … Land degradation causes a decline in land productivity and is therefore likely to lead to increased levels of poverty.
Does overgrazing cause desertification?
Overgrazing is one of the several causes for desertification, in arid areas the vegetation is necessary because the soil needs it to stay moist and fertile.